CN104764975B - Earth detector - Google Patents
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- CN104764975B CN104764975B CN201510184300.4A CN201510184300A CN104764975B CN 104764975 B CN104764975 B CN 104764975B CN 201510184300 A CN201510184300 A CN 201510184300A CN 104764975 B CN104764975 B CN 104764975B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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Abstract
A kind of earth detector that can identify common electric leakage and lightning surge as early as possible is provided.This earth detector possesses：Zero phase current transformer (ZCT) (10), alternating current circuit penetrate through the zero phase current transformer；Integration calculation unit (20) integrates the output voltage of zero phase current transformer (10)；Integrated value comparing section (30) in the case where the operation result of integration calculation unit (20) is more than prescribed limit, exports the first signal；Waveform judegment part (40) detects inflection point and the counting of the output voltage waveforms of zero phase current transformer, secondary signal is exported in the case where the quantity of inflection point reaches stated number；And detection of electrical leakage portion (50),, in the case where exporting above-mentioned first signal by integrated value comparing section (30) and exporting above-mentioned secondary signal by waveform judegment part (40), output represents to generate the detection of electrical leakage signal of electric leakage in alternating current circuit for it.
Description
The application be the applying date on 03 22nd, 2012, (international application no is Application No. 201280014407.9
The divisional application of the application of PCT/IB2012/000560), entitled " earth detector ".
Technical field
The present invention relates to a kind of earth detectors.It exports to sentence according to the detection of zero phase current transformer more particularly to a kind of
Determine whether to generate the earth detector of electric leakage in alternating current circuit.
Background technology
Electrical leakage breaking device has the line of anchor ring (toroidal) shape by cricoid iron core (core) and on the core
The zero phase current transformer (ZCT) formed is enclosed, wherein, which is formed by the magnetic body such as soft magnetic material, forms the more of alternating current circuit
A Primary Conductor penetrates through the iron core, which exports i.e. defeated according to the detection at the coil both ends of the zero phase current transformer
Go out voltage, to judge electric leakage whether is generated in the plurality of Primary Conductor.
In the case of generating electric leakage in some Primary Conductor, alternating current circuit along toward road direction flowing electric current with
Difference is generated between the electric current flowed along return road direction, so as to generate the leakage current based on the difference.Also, due to multiple one
The electrical current of partial conductor is uneven on the whole, therefore, because by magnetic flux caused by the leakage current, zero phase current transformer
The state of the magnetic flux of core changes.As a result, sensing corresponding with leakage current is detected at the coil both ends of zero phase current transformer
Voltage.
In addition, in the case where any one Primary Conductor is all without generating electric leakage, in so-called equilibrium state, i.e., this is more
The vector sum of the electrical current of a Primary Conductor is zero.In the equilibrium situation, although there are magnetic flux at the core of zero phase current transformer,
But these magnetic fluxs are cancelled out each other, and foregoing induced voltage will not be detected by zero phase current transformer.Thus, by by zero
The output voltage at the coil both ends of phase current transformer is exported as detection output, can determine that leakage whether is generated in alternating current circuit
Electric current.
As the situation for the electric leakage for detecting leakage current, consider the state commonly leaked electricity and lightning surge (Lei サ ー ジ) shape
State.Common electric leakage refers to the electric leakage that the current value of leakage current periodically occurs.Lightning surge refers to the current value ratio of leakage current
The electric leakage that the larger and current value temporarily occurs.
In the case of common electric leakage in two kinds of electric leakages, it is contemplated that electric leakage can be generated for a long time, it is therefore preferred to as early as possible
Cut through the power supply of alternating current circuit progress.On the other hand, in the case of lightning surge, electric leakage is simply temporarily generated,
Therefore the power supply that alternating current circuit progress is all cut through in each lightning surge is undesirable.
As previous earth leakage breaker, it is known that a kind of electric leakage that can prevent the unnecessary cut-out caused by lightning surge is cut
Disconnected device (referring for example to patent document 1).The earth leakage breaker utilize with detect leakage current first comparator compared with threshold value more
The second big comparator, by lightning surge or (the commonly larger leakage of the current value ratio of the particularly leakage current in electric leakage of serious ground connection
Electricity) caused by earth current be distinguish between with leakage current.Also, start monostable in the output according to the second comparator
In a period of time gate (time gate) made by state multivibrator, detect whether to compare from first by 3 ripple counters
Device outputs pulses more than 3 ripples, so as to be distinguish between to lightning surge and serious ground connection.As a result, only general including what is be seriously grounded
In the case of logical electric leakage shutoff signal is exported from shutoff signal output circuit.
Patent document 1：Japanese Unexamined Patent Publication 10-094161 publications
However, in the earth leakage breaker shown in patent document 1, in order to distinguish lightning surge and common electric leakage, according to circumstances
Difference is, it is necessary to which the leakage current larger to current value ratio is counted three times.That is, in alternating current circuit, leakage current
It is generated with the waveform of AC power, generates pulse when the leakage current of positive side or negative side is more than specified value, pass through company
It is continuous to count this pulse to be three times judged to leaking electricity.Like this by carrying out counting to be determined as electric leakage three times to leakage current
The detection of electrical leakage time is long in method.In the case of particularly serious ground connection in common electric leakage, bigger leakage current has
May constant flow, therefore from viewpoints such as protecting human bodies, preferably determine more as soon as possible be common electric leakage also
It is lightning surge.
But although the earth leakage breaker shown in patent document 1 carries out electrical leakage breaking, not according to zero phase current transformer
Output voltage shown virtual value etc. to be utilized to carry out electric leakage.Thus, the None- identifieds such as manager go out to generate any degree
Electric leakage.In addition, if to implement electrical leakage breaking simultaneously and electric leakage is shown, then it is desirable to be set to simple structure as far as possible and realizes
Cost reduction.
The present invention has been made in view of the above-described circumstances, provides a kind of leakage that can be identified and commonly leak electricity with lightning surge as early as possible
Electric detection means.
The present invention has been made in view of the above-described circumstances, provide it is a kind of can with simple and cheap structure come and meanwhile implement
Electrical leakage breaking and the earth detector of electric leakage display.
The content of the invention
Earth detector based on an embodiment of the invention possesses：Zero phase current transformer, alternating current circuit perforation should
Zero phase current transformer；Integration calculation unit integrates the output voltage of above-mentioned zero phase current transformer；Integrated value comparing section,
In the case that the operation result of above-mentioned integration calculation unit is more than prescribed limit, the first signal is exported；Waveform judegment part, in detection
The inflection point of the output voltage waveforms of zero phase current transformer and counting are stated, is exported in the case where the quantity of above-mentioned inflection point reaches stated number
Secondary signal；And detection of electrical leakage portion, above-mentioned first signal is being exported by above-mentioned integrated value comparing section and is being sentenced by above-mentioned waveform
In the case that other portion exports above-mentioned secondary signal, output represents to generate the detection of electrical leakage signal of electric leakage in above-mentioned alternating current circuit.
It is desirable that, above-mentioned waveform judegment part from the output voltage of above-mentioned zero phase current transformer be positive voltage or negative voltage when
Act the detection for starting above-mentioned inflection point.
Additionally it may be desirable to the output electricity of above-mentioned zero phase current transformer is obtained using integral operation for above-mentioned integration calculation unit
The virtual value of pressure.
In addition, the output voltage of above-mentioned zero phase current transformer can also be obtained in above-mentioned integration calculation unit using integral operation
Average value.
Above-mentioned waveform judegment part can also possess：Pulses generation portion, the output voltage ripple based on above-mentioned zero phase current transformer
Shape generates pulse；And step-by-step counting portion, the quantity of the pulse to being generated by above-mentioned pulses generation portion counts, upper
State pulse quantity reach stated number in the case of export above-mentioned secondary signal.
It is desirable that, above-mentioned pulses generation portion is more than the situation of prescribed limit in the output voltage of above-mentioned zero phase current transformer
Under, generate above-mentioned pulse.
In addition, above-mentioned pulses generation portion can also be more than the state of prescribed limit in the output voltage of above-mentioned zero phase current transformer
In the case of continuing more than the stipulated time, above-mentioned pulse is generated.
Additionally it may be desirable to above-mentioned pulses generation portion after starting to generate above-mentioned pulse above-mentioned zero phase current transformer it is defeated
Go out in the case that voltage becomes less than assigned voltage, stop the generation of above-mentioned pulse.
In addition, above-mentioned pulses generation portion can also be configured to have passed through the stipulated time from starting to generate above-mentioned pulse
In the case of, stop the generation of above-mentioned pulse.
In addition, above-mentioned pulses generation portion can also be configured to from being generated the first pulse stop before by the stipulated time
The generation of two pulses.
It is desirable that, above-mentioned step-by-step counting portion carries out the quantity of the rising edge of the pulse generated by above-mentioned pulses generation portion
It counts, above-mentioned secondary signal is exported in the case where the quantity reaches stated number.
It is that regulation is wide that above-mentioned step-by-step counting portion, which can also be configured in the pulsewidth of the pulse generated by above-mentioned pulses generation portion,
It is counted in the case of more than degree, above-mentioned secondary signal is exported in the case where its quantity reaches stated number.
In addition, above-mentioned step-by-step counting portion can also be configured to the trailing edge of the pulse to being generated by above-mentioned pulses generation portion
Quantity is counted, and above-mentioned secondary signal is exported in the case where the quantity reaches stated number.
In addition, above-mentioned step-by-step counting portion can also be from counting the first pulse to being generated by above-mentioned pulses generation portion
By the counting for stopping the second pulse before the stipulated time.
Above-mentioned waveform judegment part can also possess count value changing unit, and the count value changing unit by above-mentioned pulse based on being produced
The pulse output width for the pulse that life portion generates is in the case of more than Rack, to being counted to get by above-mentioned step-by-step counting portion
Count value change.
It is desirable that, above-mentioned pulse output width is the output time started from the pulse generated by above-mentioned pulses generation portion
Point arrives the time width at end of output time point.
When above-mentioned pulse output width can also be since the output of the first pulse generated by above-mentioned pulses generation portion
Between point to time width with the output sart point in time of continuous second pulse of above-mentioned first pulse.
In addition, above-mentioned pulse output width can also be the output knot from the first pulse generated by above-mentioned pulses generation portion
Beam time point is to the time width at the end of output time point with continuous second pulse of above-mentioned first pulse.
In addition, above-mentioned pulse output width can also be opened from the output of the first pulse generated by above-mentioned pulses generation portion
The time width at time point to the end of output time point of the second pulse beginning.
In addition, earth detector can also be also equipped with pulses generation condition changing unit, the pulses generation condition changing unit
Based on the count value counted to get by above-mentioned step-by-step counting portion, to change the Production conditions of the pulse in above-mentioned pulses generation portion.
It is desirable that, above-mentioned pulses generation condition changing unit becomes at least one party in voltage threshold and pulse width threshold
More, wherein, which uses when judging whether above-mentioned pulses generation portion generates pulse, which is to sentence
Determine what is used when whether being counted to pulse.
In addition, above-mentioned pulses generation portion can also generate positive side pulse and negative side pulse, which is based on above-mentioned
The pulse of the output voltage of the positive side of zero phase current transformer, the negative side pulse are the output electricity of the negative side based on above-mentioned zero phase current transformer
The pulse of pressure, above-mentioned step-by-step counting portion count above-mentioned positive side pulse and above-mentioned negative side pulse, in above-mentioned positive side pulse
At least one party in quantity and the quantity of above-mentioned negative side pulse is in the case of more than stated number, exports above-mentioned secondary signal.
In addition, earth detector can also be also equipped with signal input part, which inputs to make above-mentioned product
Score value comparing section exports above-mentioned first signal or makes the signal output indication signal of the above-mentioned secondary signal of waveform judegment part output.
It is desirable that, above-mentioned signal input part inputs above-mentioned signal output indication signal from non-essential resistance.
In addition, earth detector can also be also equipped with：Integration part carries out the output voltage of above-mentioned zero phase current transformer
Integration；And operation result output section, progress is corresponding with the operation result of above-mentioned integration part to be exported, wherein, above-mentioned computing
As a result output section can also be by a module composition with above-mentioned detection of electrical leakage portion.
It is desirable that, above-mentioned integration part is used as above-mentioned integration calculation unit by above-mentioned detection of electrical leakage portion.
In addition, above-mentioned integration part can also be configured to, compared with above-mentioned integration calculation unit, to above-mentioned zero during longer
The output voltage of phase current transformer averagely calculates average value, which is integrated.
It is desirable that, above-mentioned operation result output section is more than in the operation result of above-mentioned integration part than following voltage threshold
Caution signal is exported in the case of the prescribed limit of narrow range, wherein, which determined whether through above-mentioned integration
Value comparing section exports what is used during above-mentioned first signal.
In addition, above-mentioned operation result output section can also be configured to the operation result according to above-mentioned integration part, in output
Way of output when stating caution signal changes.
Earth detector can also be also equipped with operation result storage part, the operation result storage part store predetermined time quantum
Above-mentioned integration part operation result information.
Additionally it may be desirable to which earth detector is also equipped with external terminal portions, which is used to export above-mentioned fortune
Calculate the information for the operation result that result storage part is stored.
Alternatively, it is also possible to be also equipped with information output part, which is stored above-mentioned operation result storage part
The information of operation result is output to storage medium.
Alternatively, it is also possible to be also equipped with information sending part, which is stored above-mentioned operation result storage part
The information of operation result is sent to external server.
The earth detector of other embodiments of the present invention possesses：Zero phase current transformer, alternating current circuit penetrate through zero phase
Current transformer；First integral operational part integrates the output voltage of above-mentioned zero phase current transformer；Detection of electrical leakage portion, is based on
The operation result of above-mentioned first integral operational part, output represent to generate the detection of electrical leakage signal of electric leakage in above-mentioned alternating current circuit；
Second integral operational part integrates the output voltage of above-mentioned zero phase current transformer；And operation result output section, it carries out
It is corresponding with the operation result of above-mentioned second integral operational part to export, wherein, above-mentioned operation result output section and above-mentioned electric leakage inspection
Survey portion is by a module composition.
It is desirable that, above-mentioned second integral operational part is used as above-mentioned first integral operational part by above-mentioned detection of electrical leakage portion.
In addition, above-mentioned second integral operational part can also be configured to, compared with above-mentioned first integral operational part, to longer-term
The output voltage of interior above-mentioned zero phase current transformer averagely calculates average value, which is integrated.
It is desirable that, possessing integrated value comparing section, the integrated value comparing section is in the computing knot of above-mentioned first integral operational part
In the case that fruit is more than prescribed limit, the first signal is exported, above-mentioned operation result output section is in above-mentioned second integral operational part
Operation result exports caution signal in the case of being more than the prescribed limit than the narrow range of following voltage threshold, wherein, the voltage
Threshold value is used when determining whether and exporting above-mentioned first signal by above-mentioned integrated value comparing section.
In addition, above-mentioned operation result output section can also be configured to the operation result according to above-mentioned second integral operational part,
Way of output when exporting above-mentioned caution signal is changed.
Earth detector can also be also equipped with operation result storage part, the operation result storage part store predetermined time quantum
Above-mentioned second integral operational part operation result information.
Additionally it may be desirable to which earth detector is also equipped with external terminal portions, which is used to export above-mentioned fortune
Calculate the information for the operation result that result storage part is stored.
Alternatively, it is also possible to be also equipped with information output part, which is stored above-mentioned operation result storage part
The information of operation result is output to storage medium.
Alternatively, it is also possible to be configured to be also equipped with information sending part, the information sending part is by above-mentioned operation result storage part institute
The information of the operation result of storage is sent to external server.
Alternatively, it is also possible to be also equipped with：Integrated value comparing section is more than rule in the operation result of above-mentioned first integral operational part
In the case of determining scope, the first signal is exported；And waveform judegment part, the output voltage waveforms of the above-mentioned zero phase current transformer of detection
Inflection point and counting, export secondary signal in the case where the quantity of above-mentioned inflection point reaches stated number, wherein, above-mentioned detection of electrical leakage
Portion is exporting above-mentioned first signal by above-mentioned integrated value comparing section and the feelings of above-mentioned secondary signal is exported by above-mentioned waveform judegment part
Under condition, above-mentioned detection of electrical leakage signal is exported.
It is desirable that, above-mentioned waveform judegment part from the output voltage of above-mentioned zero phase current transformer be positive voltage or negative voltage when
Act the detection for starting above-mentioned inflection point.
Additionally it may be desirable to the defeated of above-mentioned zero phase current transformer is obtained using integral operation for above-mentioned first integral operational part
Go out the virtual value of voltage.
In addition, the output electricity of above-mentioned zero phase current transformer can also be obtained in above-mentioned first integral operational part using integral operation
The average value of pressure.
Above-mentioned waveform judegment part can also possess：Pulses generation portion, the output voltage ripple based on above-mentioned zero phase current transformer
Shape generates pulse；And step-by-step counting portion, the quantity of the pulse to being generated by above-mentioned pulses generation portion counts, upper
State pulse quantity reach stated number in the case of export above-mentioned secondary signal.
It is desirable that, above-mentioned pulses generation portion is more than the situation of prescribed limit in the output voltage of above-mentioned zero phase current transformer
Under, generate above-mentioned pulse.
In addition, above-mentioned pulses generation portion can also be more than the state of prescribed limit in the output voltage of above-mentioned zero phase current transformer
In the case of continuing more than the stipulated time, above-mentioned pulse is generated.
Additionally it may be desirable to above-mentioned pulses generation portion after starting to generate above-mentioned pulse above-mentioned zero phase current transformer it is defeated
Go out in the case that voltage becomes less than assigned voltage, stop the generation of above-mentioned pulse.
In addition, above-mentioned pulses generation portion can also be configured to have passed through the stipulated time from starting to generate above-mentioned pulse
In the case of, stop the generation of above-mentioned pulse.
In addition, above-mentioned pulses generation portion can also be configured to from being generated the first pulse stop before by the stipulated time
The generation of two pulses.
It is desirable that, above-mentioned step-by-step counting portion carries out the quantity of the rising edge of the pulse generated by above-mentioned pulses generation portion
It counts, above-mentioned secondary signal is exported in the case where the quantity reaches stated number.
It is that regulation is wide that above-mentioned step-by-step counting portion, which can also be configured in the pulsewidth of the pulse generated by above-mentioned pulses generation portion,
It is counted in the case of more than degree, above-mentioned secondary signal is exported in the case where its quantity reaches stated number.
In addition, above-mentioned step-by-step counting portion can also be configured to the trailing edge of the pulse to being generated by above-mentioned pulses generation portion
Quantity is counted, and above-mentioned secondary signal is exported in the case where the quantity reaches stated number.
In addition, above-mentioned step-by-step counting portion can also be from counting the first pulse to being generated by above-mentioned pulses generation portion
By the counting for stopping the second pulse before the stipulated time.
Above-mentioned waveform judegment part can also possess count value changing unit, and the count value changing unit by above-mentioned pulse based on being produced
The pulse output width for the pulse that life portion generates is in the case of more than Rack, to being counted to get by above-mentioned step-by-step counting portion
Count value change.
It is desirable that, above-mentioned pulse output width is the output time started from the pulse generated by above-mentioned pulses generation portion
Point arrives the time width at end of output time point.
When above-mentioned pulse output width can also be since the output of the first pulse generated by above-mentioned pulses generation portion
Between point to time width with the output sart point in time of continuous second pulse of above-mentioned first pulse.
In addition, above-mentioned pulse output width can also be the output knot from the first pulse generated by above-mentioned pulses generation portion
Beam time point is to the time width at the end of output time point with continuous second pulse of above-mentioned first pulse.
In addition, above-mentioned pulse output width can also be opened from the output of the first pulse generated by above-mentioned pulses generation portion
The time width at time point to the end of output time point of the second pulse beginning.
In addition, earth detector can also be also equipped with pulses generation condition changing unit, the pulses generation condition changing unit
Based on the count value counted to get by above-mentioned step-by-step counting portion, to change the Production conditions of the pulse in above-mentioned pulses generation portion.
It is desirable that, above-mentioned pulses generation condition changing unit becomes at least one party in voltage threshold and pulse width threshold
More, wherein, which uses when judging whether above-mentioned pulses generation portion generates pulse, which is to sentence
Determine what is used when whether being counted to pulse.
In addition, above-mentioned pulses generation portion can also generate positive side pulse and negative side pulse, which is based on above-mentioned
The pulse of the output voltage of the positive side of zero phase current transformer, the negative side pulse are the output electricity of the negative side based on above-mentioned zero phase current transformer
The pulse of pressure, above-mentioned step-by-step counting portion count above-mentioned positive side pulse and above-mentioned negative side pulse, in above-mentioned positive side pulse
At least one party in quantity and the quantity of above-mentioned negative side pulse is in the case of more than stated number, exports above-mentioned secondary signal.
In addition, earth detector can also be also equipped with signal input part, which inputs to make above-mentioned product
Score value comparing section exports above-mentioned first signal or makes the signal output indication signal of the above-mentioned secondary signal of waveform judegment part output.
It is desirable that, above-mentioned signal input part inputs above-mentioned signal output indication signal from non-essential resistance.
The effect of invention
In accordance with the invention it is possible to common electric leakage and lightning surge are identified as early as possible.
Description of the drawings
By the explanation of following attached drawing and preferred embodiment come the clear and definite purpose of the present invention and feature.
Fig. 1 is the circuit block diagram of the configuration example of the earth detector in the first embodiment for represent the present invention.
Fig. 2 is the circuit block diagram of the detailed construction example of the waveform judegment part in the first embodiment for represent the present invention.
Fig. 3 is for illustrating the time diagram of the 1st action example of the earth detector in the first embodiment of the present invention.
Fig. 4 is for illustrating the time diagram of the 2nd action example of the earth detector in the first embodiment of the present invention.
Fig. 5 is for illustrating the time diagram of the 3rd action example of the earth detector in the first embodiment of the present invention.
Fig. 6 is for illustrating the time diagram of the 4th action example of the earth detector in the first embodiment of the present invention.
Fig. 7 is for illustrating the time diagram of the 5th action example of the earth detector in the first embodiment of the present invention.
Fig. 8 is the circuit block diagram for the detailed construction example for representing the waveform judegment part in second embodiment of the present invention.
Fig. 9 is for illustrating the time diagram of the action example of the earth detector in second embodiment of the present invention.
Figure 10 is the circuit block diagram for the detailed construction example for representing the waveform judegment part in third embodiment of the present invention.
Figure 11 is for illustrating the time diagram of the action example of the earth detector in third embodiment of the present invention.
Figure 12 is the circuit block diagram of the detailed construction example of the waveform judegment part in the 4th embodiment for represent the present invention.
Figure 13 is for illustrating the time diagram of the action example of the earth detector in the 4th embodiment of the present invention.
Figure 14 is the circuit block diagram of the configuration example of the earth detector in the 5th embodiment for represent the present invention.
Figure 15 is the block diagram of the 1st configuration example of the earth detector in the sixth embodiment for represent the present invention.
Figure 16 is the block diagram of the 2nd configuration example of the earth detector in the sixth embodiment for represent the present invention.
Figure 17 is the block diagram of the 3rd configuration example of the earth detector in the sixth embodiment for represent the present invention.
Figure 18 is the block diagram of the 4th configuration example of the earth detector in the sixth embodiment for represent the present invention.
Figure 19 is the block diagram of the 5th configuration example of the earth detector in the sixth embodiment for represent the present invention.
Figure 20 is the block diagram of the 6th configuration example of the earth detector in the sixth embodiment for represent the present invention.
Specific embodiment
In the following, the attached drawing with reference to the part for forming this specification is described in more detail embodiments of the present invention.
Same reference marker is added to same or similar part in all attached drawings and is omitted the description.
(first embodiment)
Fig. 1 is the block diagram of the configuration example of the earth detector in the first embodiment for represent the present invention.It is shown in FIG. 1
Earth detector 100 is configured to zero phase current transformer 10, integration calculation unit 20, integrated value comparing section 30, waveform judegment part
40th, detection of electrical leakage portion 50.
Zero phase current transformer 10 is made of the coil of cricoid iron core (core) and the anchor ring shape on the core, wherein, it should
Iron core is formed by the magnetic body such as soft magnetic material, and the multiple Primary Conductors for forming the alternating current circuit for the electrical current for flowing through three-phase are passed through
Lead to the iron core.In alternating current circuit difference is generated along between the electric current flowed toward road direction and the electric current flowed along return road direction
In the case of, the leakage current based on the difference is generated in zero phase current transformer 10.Moreover, it is generated at the both ends of coil and the electricity that leaks electricity
Flow corresponding induced voltage.Zero phase current transformer 10 is exported the induced voltage as the output voltage of zero phase current transformer 10, i.e. ZCT
Voltage output is to integration calculation unit 20 and waveform judegment part 40.Though in addition, do not illustrated, in order to from zero phase current transformer 10
Voltage output is obtained, with zero phase current transformer 10 in parallel inserted with resistive element.
Integration calculation unit 20 is made of integrating circuit etc., and ZCT output voltages are added up, by the voltage of accumulative gained
(accumulation voltage) is output to integrated value comparing section 30 as output voltage.
In addition, the virtual value of ZCT output voltages can also be obtained in integration calculation unit 20 using integral operation.It is for example, right
The square values of ZCT output voltages carry out the integration of a cycle amount and divided by a cycle time, the square root of its value is obtained.
In this case, leakage current can be more precisely detected, so as to improve the detection of electrical leakage performance to distorted wave.In addition,
The average value of ZCT output voltages can also be obtained in integration calculation unit 20 using integral operation.For example, to ZCT output voltages
Absolute value carry out a cycle amount integration and divided by a cycle time, be averaged to calculate absolute value.The absolute value is averaged
Value in integrated value comparing section 30 for being compared.In this case, can be dropped compared with the situation that virtual value is obtained
Low operand, so as to be formed earth detector 100 with low cost.
Integrated value comparing section 30 is made of comparison circuit etc., integration calculation unit 20 operation result, that is, integrated value it is absolute
In the case of being worth for more than the integrated value decision threshold th1 as specified value, to 50 output voltage H of detection of electrical leakage portion (with reference to figure
3).Here, integrated value decision threshold th1 is positive number.On the other hand, it is less than integrated value decision threshold in the absolute value of aggregate-value
In the case of th1, to 50 output voltage L of detection of electrical leakage portion.The output voltage of integrated value comparing section 30 is that the situation of voltage H is suitable
The situation of specified signal (the first signal) is exported in integrated value comparing section 30.In addition, voltage H is higher than voltage L.
Waveform judegment part 40 detects the inflection point of the voltage waveform of ZCT output voltages and counting, reaches in the quantity of the inflection point
In the case of stated number, to 50 output voltage H of detection of electrical leakage portion.On the other hand, the feelings of stated number are not up in the quantity of inflection point
Under condition, to 50 output voltage L of detection of electrical leakage portion.The output voltage of waveform judegment part 40 is equivalent to waveform for the situation of voltage H and sentences
Other portion 40 exports the situation of specified signal (secondary signal).Stated number is, for example, " 2 ", " 3 " etc. herein.In addition, waveform judegment part
40 detailed construction is described below.
In addition, waveform judegment part 40 both can be above-mentioned since ZCT output voltages is positive voltages inflection point detection,
The detection of inflection point that can also be above-mentioned since ZCT output voltages is negative voltages.Thereby, it is possible to carry out inflection point at high speed
Detection can cut off alternating current circuit to higher speed in the case of common electric leakage.
Detection of electrical leakage portion 50 is made of " with (AND) " circuit etc., integrated value comparing section 30 output voltage for voltage H and
In the case that the output voltage of waveform judegment part 40 is voltage H, output voltage H.The output voltage in detection of electrical leakage portion 50 is voltage H
Situation be equivalent to output represent alternating current circuit in generate electric leakage detection of electrical leakage signal situation.In addition, detection of electrical leakage is believed
Number it is sent to disconnection as disconnecting (for cut off alternating current circuit) shutoff signal of the circuit contact of alternating current circuit
State the breaking coil (not shown) of circuit contact.As a result, the circuit contact of alternating current circuit is disconnected.
Then, the detailed construction of waveform judegment part 40 is illustrated.Fig. 2 is the frame for the detailed construction example for representing waveform judegment part 40
Figure.Waveform judegment part 40 shown in Fig. 2 is configured to pulses generation portion 41, step-by-step counting portion 42.
Pulses generation portion 41 is made of pulse-generating circuit etc., and pulse is generated based on ZCT output voltages.In the example of Fig. 3
, it is specified that the voltage of the short time of voltage value (voltage H) is output as pulse in son.
Step-by-step counting portion 42 is made of pulse counter etc., and the quantity of the pulse to being generated by pulses generation portion 41 is counted
Number, in the case where the quantity of pulse reaches stated number, is set to voltage H by output voltage, exports above-mentioned secondary signal.It is another
Output voltage in the case where the quantity of pulse is not up to stated number, is set to voltage L by aspect, does not export the second above-mentioned letter
Number.
Then, the action of the earth detector 100 of present embodiment is illustrated.Fig. 3 is for illustrating present embodiment
The time diagram of 1st action example of earth detector 100.
In the example in figure 3, it is assumed that pulses generation portion 41 is leakage current detection threshold value in the absolute value of ZCT output voltages
The narrow pulse of width is generated in the case of more than th2.Here, leakage current detection threshold value th2 is positive number.This pulses generation portion
41 pulses generation action is equivalent to the inflection point of detection output voltage waveforms.It will not be malfunctioned as a result, due to lightning surge, energy
It is enough to be acted in the case of desired leakage current value, detect to leak electricity to higher speed.On the other hand, electricity is exported in ZCT
In the case that the absolute value of pressure is less than leakage current detection threshold value th2, pulse is not generated.In addition, here, when pulse rises by
Step-by-step counting portion 42 is counted.
" leakage current " of Fig. 3 represents the electric leakage generated in the zero phase current transformer 10 in each situation (common electric leakage, lightning surge)
Electric current.As shown in figure 3, generate periodic leakage current in the case of common electric leakage generates electric current in the case of lightning surge
It is worth bigger and temporary leakage current.
" the ZCT outputs " of Fig. 3 represent with respectively in the case of the corresponding zero phase current transformer 10 of leakage current output voltage
(ZCT output voltages).
The output voltage in the pulses generation portion 41 in the case of " output of pulses generation portion " expression respectively of Fig. 3.In the example of Fig. 3
In, it generates 3 wave impulses in the case of the common electric leakage of same period and 2 wave impulses is generated in the case of lightning surge, common
More pulses are generated during electric leakage.
The count value that step-by-step counting portion 42 in the case of " counter " expression respectively of Fig. 3 is kept.
The output voltage in the step-by-step counting portion 42 in the case of " counter output " expression respectively of Fig. 3.In the example in figure 3,
When generating the pulse of the 3rd ripple, the output voltage in step-by-step counting portion 42 becomes voltage H.
The output voltage of integration calculation unit 20 in the case of " integral operation output " expression respectively of Fig. 3.
The output voltage of integrated value comparing section 30 in the case of " integrated value compares output " of Fig. 3 representing each.
The output voltage in the detection of electrical leakage portion 50 in the case of " detection of electrical leakage signal output " expression respectively of Fig. 3.
According to this 1st action example, common electric leakage and lightning surge can be identified as early as possible.
Fig. 4 is for illustrating the time diagram of the 2nd action example of the earth detector 100 of present embodiment.
In the example in fig. 4, it is assumed that pulses generation portion 41 is leakage current detection threshold value in the absolute value of ZCT output voltages
The state of more than th2 generates the narrow pulse of width in the case of continue for more than the stipulated time.On the other hand, electricity is exported in ZCT
It is leakage current in the case that the absolute value of pressure is less than leakage current detection threshold value th2 or in the absolute value of ZCT output voltages
In the case that the state of more than detection threshold value th2 does not continue more than the stipulated time, pulse is not generated.
As shown in figure 4, consider to also consider continuing for stipulated time while the voltage value of ZCT output voltages, therefore, with figure
3 compare, and the timing of " output of pulses generation portion " after delay stipulated time is output.In the present embodiment, step-by-step counting portion
42 count pulse in the rising edge of pulse.Correspondingly, " counter ", " counter output ", " detection of electrical leakage signal
The timing of output " also postpones.It will not be malfunctioned as a result, due to lightning surge, it can be in the situation of desired leakage current value
Under acted, detect to leak electricity to higher speed.Also, also strong to antimierophonic ability, robustness improves.
In addition, " integral operation output ", " integrated value compares output ", " detection of electrical leakage signal output " in Fig. 4, is omitted
Diagram.
Fig. 5 is for illustrating the time diagram of the 3rd action example of earth detector 100.
In the example of fig. 5, it is assumed that the absolute value of ZCT output voltages after generation pulse is started of pulses generation portion 41 becomes
The generation of stop pulse during less than pulse stopping decision threshold th3.On the other hand, it is pulse in the absolute value of ZCT output voltages
In the case of stopping more than decision threshold th3, continue to generate pulse.Here, th2>th3>0.
Thus, as shown in " output of pulses generation portion " of Fig. 5, become leakage current inspection from the absolute value of ZCT output voltages
It surveys more than threshold value th2 and plays the absolute value and become less than until pulse stops decision threshold th3, generate a pulse.In addition,
This, is counted when pulse declines by step-by-step counting portion 42.Thus, compared with situation about being counted when pulse rises,
" counter ", " counter output ", the constant time lag of " detection of electrical leakage signal output ".
In addition, " integral operation output ", " integrated value compares output ", " detection of electrical leakage signal output " in Figure 5, is omitted
Diagram.
In addition, here, show a case that determine pulse dwell time point and consider voltage, but it is also contemplated that
Time replaces voltage.For example, pulses generation portion 41 can also as be described hereinafter as shown in Figure 6, from starting to generate pulse
Stop pulse when have passed through stipulated time (Rack) t2.If this mode, then when starting to generate postimpulse regulation
Between in a period of, noise does not interfere with detection of electrical leakage.
Fig. 6 is for illustrating the time diagram of the 4th action example of the earth detector 100 of present embodiment.
In the example of fig. 6, it is assumed that pulses generation portion 41 is when after generating the pulse with Rack t2 in regulation
It is interior not generate next pulse.I.e., it is assumed that pulses generation portion 41 from being generated the first pulse by the stipulated time before stop
The generation of second pulse.In the example of fig. 6, it is only applied to situation about commonly leaking electricity during pulse output shielding.
In the example of fig. 6, in common electric leakage, one is included during as the pulse of stipulated time output shielding
The generation timing of pulse.In this case, it should by the second pulse that pulses generation portion 41 generates and weight during output shielding
It is folded, thus second pulse during the output shields after generate.Thus, the count value of step-by-step counting can postpone an arteries and veins
It rushes and is counted.
In addition, in example shown in lightning surge in Fig. 6, it is assumed that the is generated during being shielded by pulses generation portion 41 without output
One pulse and the second pulse, step-by-step counting portion 42 count pulse in pulse falling edge, are counted to the first pulse
It rises by before the stipulated time, stopping the counting of the second pulse.In the example of fig. 6, it is only applied to thunder during counting shielding
Situation about gushing.
In the example shown in lightning surge, the counting for including a pulse during the counting shielding as the stipulated time is determined
When.In this case, it should it is be overlapped with during counting shielding by the second pulse that step-by-step counting portion 42 is counted, therefore should
Second pulse the counting shield during after be counted.Thus, the count value of step-by-step counting can postpone a pulse and by
It counts.Thus, the constant time lag of " counter ", therefore corresponding to which, " counter output ", " detection of electrical leakage signal output "
Timing also postpones.
In addition, " integral operation output ", " integrated value compares output ", " detection of electrical leakage signal output " in figure 6, is omitted
Diagram.
In this way, during pluse shielding by setting the stipulated time or during counting shielding, arteries and veins can be correctly carried out
Punching generates or carries out step-by-step counting.It can particularly prevent the error detection of lightning surge, can prevent the mistake of earth detector 100
Action.In addition, in the present embodiment, the generation timing of a pulse is included during pulse output shielding, is shielded counting
The counting and timing of a pulse is included during covering, therefore, when second pulse is counted, the output electricity in step-by-step counting portion 42
Buckling is voltage H.
Fig. 7 is for illustrating the time diagram of the 5th action example of the earth detector 100 of present embodiment.
In the example of fig. 7, the absolute value of pulses generation portion 41 from ZCT output voltages becomes leakage current detection threshold value
More than th2 is played until the absolute value becomes less than leakage current detection threshold value th2, generates a pulse.In addition, it is assumed that pulse
Count section 42 is counted in the case of being more than Rack A in the pulsewidth (time width) of the pulse generated by pulses generation portion 41
Number.On the other hand, in the case where the pulsewidth of pulse is less than Rack A, counted not as pulse.
In addition, it here, is counted when pulse declines by step-by-step counting portion 42.Thus, with being carried out when pulse rises
The situation of counting is compared, " counter ", " counter output ", the constant time lag of " detection of electrical leakage signal output ".
In addition, " integral operation output ", " integrated value compares output ", " detection of electrical leakage signal output " in the figure 7, is omitted
Diagram.According to this action example, easily lightning surge and common electric leakage can be distinguish between being detected.
(second embodiment)
As shown in figure 8, the earth detector 100 of second embodiment possesses waveform judegment part 40B to replace first in fact
Apply the waveform judegment part 40 shown in mode.In addition, to the earth detector 100 of present embodiment and first embodiment institute
The identical structure of the earth detector 100 that shows assigns same tag, omits the description.
Fig. 8 is the block diagram for the configuration example for representing the waveform judegment part 40B in second embodiment of the present invention.Shown in Fig. 8
Waveform judegment part 40B in addition to possessing pulses generation portion 41 and step-by-step counting portion 42, be also equipped with count value changing unit 43.
Count value changing unit 43 is made of control circuit etc., detects the pulse based on the pulse generated by pulses generation portion 41
Width is exported, in the case where pulse output width is more than Rack or less than Rack, pulse count portion
42 count value changes.For example, can be exported in pulse in the case that width is more than Rack increases count value
1, in the case of being below Rack in pulse output width count value is made to reduce 1.
In the present embodiment, pulses generation portion 41 is leakage current detection threshold value th2 in the absolute value of ZCT output voltages
Pulse is generated in above section.In addition, the trailing edge in each pulse counts pulse.Here, " pulse output width "
As follows (with reference to aftermentioned Fig. 9).
(A) from the output sart point in time (rise time point) of the pulse P1 as the first pulse to end of output time point
The time width A1 (using threshold value T1 in this case) of (fall time point)
(B) from the output sart point in time of the pulse P1 as the first pulse to as with continuous second arteries and veins of the first pulse
The time width A2 (using threshold value T2 in this case) of the output sart point in time of the pulse P2 of punching
(C) the time width A3 at the end of output time point from the end of output time point of pulse P1 to pulse P2 is (in this feelings
Threshold value T3 is used under condition)
(D) the time width A4 at the end of output time point from the output sart point in time of pulse P1 to pulse P2 is (in this feelings
Threshold value T4 is used under condition)
Fig. 9 is for illustrating the time diagram of the action example of the earth detector 100 of present embodiment.
In the example of figure 9, when pulse output width A3 is more than threshold value T3 Counter Value is made to increase 1.Thereby, it is possible to
Flexibly set the timing for changing count value.Thus, by the way that some in each time width A1~A4 being set as, pulse is defeated
Go out width, the actuation time of earth detector 100 will not postpone, and can prevent from malfunctioning.
Pulsewidth A3 in example shown in Fig. 9 in the case of common electric leakage between pulse P1 and P2 is more than threshold value T3,
Therefore at the trailing edge time point of pulse P2, count value increases to 3 from 1, and voltage is generated from step-by-step counting portion 42 at the time point
H。
In addition, " integral operation output ", " integrated value compares output ", " detection of electrical leakage signal output " in fig.9, is omitted
Diagram.
(the 3rd embodiment)
The earth detector 100 of 3rd embodiment possesses waveform judegment part 40C to replace shown in first embodiment
Waveform judegment part 40.In addition, the earth detector 100 of present embodiment is examined with the electric leakage shown in first embodiment
It surveys the identical structure of device 100 and assigns same tag, omit the description.
Figure 10 is the block diagram for the configuration example for representing the waveform judegment part 40C in third embodiment of the present invention.Figure 10 institutes
The waveform judegment part 40C shown is also equipped with the change of pulses generation condition in addition to possessing pulses generation portion 41 and step-by-step counting portion 42
More portion 44.
Pulses generation condition changing unit 44 is made of control circuit etc., based on the counting counted to get by step-by-step counting portion 42
Value, the step-by-step counting condition of Production conditions and/or step-by-step counting portion 42 to the pulse in pulses generation portion 41 change.
As the Production conditions of pulse, there is voltage threshold, which made when judging whether pulses generation portion 41 generates pulse
, as step-by-step counting condition, there is pulsewidth (time width) threshold value etc..Pulses generation condition changing unit 44 is for example to the voltage threshold
(such as " the leakage current detection threshold value th2 " illustrated in first embodiment) and pulse width threshold (such as in first embodiment
" the Rack A " illustrated) at least one party change.
Figure 11 is for illustrating the time diagram of the action example of the earth detector 100 of present embodiment.
Trailing edge in the example of Figure 11 in the case of the peak pulse duration A long of the first pulse and the second pulse in pulse
It is counted, pulses generation condition changing unit 44 is in the pulse in the time point pulse count portion 42 that the output of counter is " 2 "
Time threshold when generating judgement changes.That is, counting down to for 2 time point, for pulses generation portion 41 when
Between threshold value, be changed to instantaneously detect.That is, the rising edge in pulse is counted.Thereby, it is possible to prevent that lightning surge etc. from being led
The malfunction of the earth detector 100 of cause, and can cut off alternating current circuit to higher speed in the case of common electric leakage.
In addition, in fig. 11, be omitted " integral operation output ", " integrated value compares output ", " detection of electrical leakage signal is defeated
Go out " diagram.
(the 4th embodiment)
The earth detector 100 of 4th embodiment possesses waveform judegment part 40D to replace shown in first embodiment
Waveform judegment part 40.In addition, the earth detector 100 of present embodiment is examined with the electric leakage shown in first embodiment
It surveys the identical structure of device 100 and assigns same tag, omit the description.
Figure 12 is the block diagram of the configuration example of the waveform judegment part 40D in the 4th embodiment for represent the present invention.Figure 12 institutes
The waveform judegment part 40D shown possess positive side pulses generation portion 41A, negative side pulses generation portion 41B, positive side step-by-step counting portion 42A with
And negative side step-by-step counting portion 42B.
Positive side pulses generation portion 41A generates positive side pulse, which is the arteries and veins of the ZCT output voltages based on positive side
Punching.Negative side pulses generation portion 41B generates negative side pulse, which is the pulse of the ZCT output voltages based on negative side.This
Outside, the condition that positive side pulse or negative side pulse are generated based on ZCT output voltages is identical with what is illustrated before.
Positive side step-by-step counting portion 42A counts positive side pulse, will in the case where the count number is more than stated number
Output voltage is set to voltage H, exports secondary signal.Negative side step-by-step counting portion 42B counts negative side pulse, in the count number
In the case of more than stated number, output voltage is set to voltage H, exports secondary signal.Thus, positive side pulse quantity and
At least one party in the quantity of negative side pulse is exports secondary signal in the case of more than stated number.In addition, to positive side pulse or
The condition that person's negative side pulse is counted is identical with what is illustrated before.
Figure 13 is for illustrating the time diagram of the action example of the earth detector 100 of present embodiment.
The output voltage of positive side pulses generation portion 41A in the case of " output of positive side pulses generation portion " expression respectively of Figure 13.
2 ripple positive side pulses are generated in the case of the common electric leakage of same period and produced in the case of lightning surge in the example of Figure 13
Raw 1 ripple positive side pulse generates more pulses in common electric leakage.
The count value that positive side step-by-step counting portion 42A in the case of " positive side counter " expression respectively of Figure 13 is kept.
The output voltage of negative side pulses generation portion 41B in the case of " output of negative side pulses generation portion " expression respectively of Figure 13.
In the case of the common electric leakage of same period generate 1 ripple negative side pulse in the example of Figure 13 and in the case of lightning surge
Generate 1 ripple negative side pulse.
The count value that negative side step-by-step counting portion 42B in the case of " negative side counter " expression respectively of Figure 13 is kept.
" counter output " expression of Figure 13 considers the output of positive side counter and negative side counter.In the example of Figure 13
In, at least one party in positive side step-by-step counting portion 42A and negative side step-by-step counting portion 42B will be in positive side pulse and negative side pulse
In the case that at least one party count down to more than 2 ripples, the output voltage of counter output becomes voltage H.Thus, in the example of Figure 13
In, only in the case of common electric leakage, counter output becomes voltage H.Though it in addition, is not illustrated, positive side step-by-step counting portion
The output of 42A, negative side step-by-step counting portion 42B are output to electric leakage output section 50 by OR-gate (OR gate).
In addition, in fig. 13, be omitted " integral operation output ", " integrated value compares output ", " detection of electrical leakage signal is defeated
Go out " diagram.
In such manner, it is possible to the positive side of ZCT output voltages and negative side are distinguish between to carry out pulses generation and step-by-step counting, by
This can easily detect half-wave electric leakage.
(the 5th embodiment)
Figure 14 is the block diagram of the configuration example of the earth detector E in the 5th embodiment for represent the present invention.Electric leakage inspection
It surveys device 100E and possesses zero phase current transformer 10, integration calculation unit 20, integrated value comparing section 30, waveform judegment part 40, detection of electrical leakage
Portion 50E and multiple logical operation sections as integrated circuit.It is patrolled here, instantiating and possessing the first logical operation section 60 and second
Situation of the operational part 70 as multiple logic circuit units is collected, but be not restricted to that this.In addition it is also possible to the ripple illustrated before use
Shape judegment part 40B~40D replaces waveform judegment part 40.To the earth detector 100E of present embodiment and the first~the
The identical structure of earth detector 100 shown in four embodiments assigns same tag, omits the description.
First logical operation section 60 and the second logical operation section 70 have the function of as signal input part, signal input
Portion inputs to make the output voltage of integrated value comparing section 30 for voltage H (its is that is made to export the first signal) and be used for
Make signal output indication signal of the output voltage of waveform judegment part 40 for voltage H (it is that is made to export secondary signal).
Thus, by these circuit portions, the polyalgorithm illustrated in the embodiment of first embodiment~the 4th can be changed.
That is, basis is from external signal respectively for the first logical operation section 60 and the second logical operation section 70, with integrated value ratio
Output compared with portion 30 and waveform judegment part 40 independently exports the first signal and the second signal to detection of electrical leakage portion 50E.
First logical operation section 60 is made of " or (OR) " circuit etc., in the output voltage of integrated value comparing section 30 and external
In the case that at least one party in the output voltage in circuit portion is voltage H, output voltage H.
Second logical operation section 70 is made of " or (OR) " circuit etc., output voltage and external electricity in waveform judegment part 40
In the case that at least one party in the output voltage in road portion is voltage H, output voltage H.
In addition, the outer circuits portion as the first logical operation section 60 and the second logical operation section 70, considers low capacity
Chip-R.The Chip-R is connected with the input pin (pin) of the first logical operation section 60, the second logical operation section 70.By
This, can inexpensively form the circuit that outer circuits portion is included.It is also possible that it is exported from non-essential resistance input signal
Indication signal.
Detection of electrical leakage portion 50E is made of " with (AND) " circuit etc., is voltage in the output voltage of the first logical operation section 60
In the case that the output voltage of H and the second logical operation section 70 is voltage H, output voltage H.The output electricity of detection of electrical leakage portion 50E
Situation about pressing as voltage H is equivalent to output and represents to generate the situation of the detection of electrical leakage signal of electric leakage in alternating current circuit.In addition, leakage
Power detection signal is sent as disconnecting (for cutting off alternating current circuit) shutoff signal of the circuit contact of alternating current circuit
To the breaking coil (not shown) for disconnecting foregoing circuit contact.As a result, the circuit contact of alternating current circuit is disconnected.
According to the earth detector 100E of this present embodiment, if making to be connected with the first logical operation section 60 outer
The output voltage in circuits portion is voltage H, then defeated with the integrated value comparing section 30 of the embodiment of first embodiment~the 4th
Go out voltage be always voltage H situation it is equivalent, therefore the function of integrated value comparing section 30 can be made invalid.Similarly, if made
The output voltage in the outer circuits portion being connected with the second logical operation section 70 is voltage H, then real with first embodiment~4th
The output voltage for applying 40 grade of waveform judegment part (40, in 40B~40D some) of mode is always that the situation of voltage H is equivalent,
Therefore the function of 40 grade of waveform judegment part can be made invalid.I.e. it is capable to make the function of folk prescription using outer circuits portion
It is invalid.
In addition, it here, illustrates to fill detection of electrical leakage using the first logical operation section 60 and the second logical operation section 70
The invalid situation of the part of functions of 100E is put, but these circuit portions can not also be used.For example, it is also possible to it is configured to never
The external device (ED) of diagram inputs to change in integration calculation unit 20, integrated value comparing section 30 and waveform judegment part 40 at least
Each threshold value such as voltage threshold, the time threshold of one or the change signal for changing count value.For example, changing each threshold
In the case of value, the value that measurement voltage, time of measuring are more than the threshold value always can also be changed to.It in addition, for example, it is also possible to will
Count value is changed to always more than the value of count threshold.According to this structure, it can similarly make earth detector 100E's
Part of functions is invalid.
(sixth embodiment)
Figure 15 is the block diagram of the configuration example of the earth detector 100F in the sixth embodiment for represent the present invention.This reality
The earth detector 100F for applying mode has zero phase current transformer 10, the first system (levels of leakage test section 80) and the second system
System, the first system have as the dress of the detection of electrical leakage in addition to zero phase current transformer 10 illustrated in the first~the 5th embodiment
The function of 100,100E is put, which integrates the output voltage (ZCT output voltages) of zero phase current transformer 10, carries out
It is corresponding with integral result to export.That is, the first system realizes the function related with electrical leakage breaking, second system, which is realized, to be used
In the function of informing the user electrical leakage quantity (leakage current value).
Levels of leakage test section 80 as the first system has foregoing integration calculation unit 20, integrated value comparing section
30th, waveform judegment part 40, detection of electrical leakage portion 50 etc..Wherein, levels of leakage test section 80 at least possesses integration calculation unit 20 and leakage
Electro-detection portion 50.In the case where levels of leakage test section 80 only possesses integration calculation unit 20 and detection of electrical leakage portion 50, electric leakage inspection
Survey portion 50 exports detection of electrical leakage signal based on the operation result of integration calculation unit 20.
Second system possesses integration part 91 and operation result output section 92.Integration part 91 integrates ZCT output voltages,
With the structure identical with the integration calculation unit 20 illustrated before.Operation result output section 92 carries out the computing knot with integration part 91
Fruit (integrated value) exports accordingly.Operation result output section 92 exports various such as by display (not shown), loud speaker
Information.Here, the ZCT output voltages obtained illustrating as operation result, such as output as before using integral operation
Virtual value (virtual value operation result), average value (the average value computing knot of the ZCT output voltages obtained using integral operation
Fruit).
Here, each structural portion of the first system and second system is formed in an integrated circuit (module).Thus,
It, being capable of cost of implementation reduction by forming earth detector 100F like this in same packaging body.I.e. it is capable to
Simple and cheap structure implements simultaneously electrical leakage breaking and electric leakage is shown.
In addition, as shown in figure 16, integration part 91 can also be used as the integration calculation unit 20 illustrated in first embodiment.
That is, levels of leakage test section 80 can also be made not possess integration calculation unit 20, and by the output of integration part 91 by integrating
Value comparing section 30 inputs.In this way, by sharing for the structure integrated, it being capable of cost of implementation reduction.Further, since it shares
The hardware such as integrating circuit are influenced thus without the difference by hardware, the computing mode for integral operation, are accordingly used in leaking electricity
The horizontal detected value of detection and error will not be generated between the show value of electric leakage degree for showing, therefore can be between the two
The mode for not generating contradiction is adjusted.
In addition, operation result output section 92 can also be exported averages institute to the integrated value calculated by integration part 91
The value (average value) obtained.In addition, integrated value comparing section 30 can also will carry out the integrated value calculated by integration calculation unit 20
The value (average value) of gained is equalized compared with specified value (integrated value decision threshold th1).Average value for example refers to the time
It is average.At this time, it is preferred that put down during when averaging operation result output section 92 than integrated value comparing section 30
It is long during during homogenizing.Alternatively, it is also possible to compared with integration calculation unit 20, integration part 91 exports electricity to the ZCT during longer
Pressure averagely calculates the average value of ZCT output voltages, which is integrated to obtain integrated value.Thereby, it is possible to
Integrated value is correctly exported from the influence of the variation of the ZCT output voltages caused by the noises such as surge voltage (with electric leakage electricity
Flow valuve is suitable) etc..
In addition, here, be illustrated as average value, but average value can also be replaced using virtual value.
In addition, operation result output section 92 can also be more than threshold in the absolute value of the operation result (integrated value) of integration part 91
In the case of value th4, caution signal (alarm) is exported, wherein, threshold value th4 in levels of leakage test section 80 than leaking electricity
Small (the th2 of leakage current detection threshold value th2 of detection>th4>0).On caution signal herein, it may be considered that believed using sound
The warning of breath utilizes warning for showing information etc..That is, can also be more than in the operation result of integration part 91 is in judgement
In the case of the threshold value th2 used during no the first signal of output by integrated value comparing section 30, caution signal is exported.Exist as a result,
Before the electric leakage for detecting the degree of alternating current circuit to be cut off, user can identify the state of electric leakage in advance.
In addition, operation result output section 92 can also according to the operation result of integration part 91 come to output caution signal when
The way of output changes.In this case it is possible, for example, to consider that the absolute value in the operation result of integration part 91 is more than leakage
LED is lighted in the case of the 50% of the absolute value of electric current detection threshold th2, exhausted more than leakage current detection threshold value th2
To exporting alarm tone in the case of the 80% of value.Thereby, it is possible to correctly notify the urgency (level) away from electrical leakage breaking, so as to
It can avoid the state of affairs for causing electrical leakage breaking suddenly.
In addition, as shown in figure 17, earth detector 100F can also possess operation result storage part 93, the operation result
Storage part 93 stores the operation result of integration part 91.Operation result storage part 93 is such as store predetermined time quantum (the amount of one week)
Operation result information.At this time it is also possible to it is written over by coverage information after the stipulated time.In addition, computing knot
The information of fruit refers to integrated value (virtual value, average value) of ZCT output voltages etc..As a result, by storage until electrical leakage breaking is
The operation result of set time only becomes prone to determine cut-out reason.
In addition, as shown in figure 18, earth detector 100F can also possess external terminal portions 94, the external terminal portions 94
For exporting the letter of the operation result of the information of the operation result of integration part 91, operation result storage part 93 by external terminal
Breath.External terminal portions 94 are, for example, USB (Universal Serial Bus：Universal serial bus) terminal etc..It is outer by possessing
Portion's portion of terminal 94 can easily export the information of operation result, become prone to determine cut-out reason.
In addition, as shown in figure 19, earth detector 100F can also possess information output part 95, the information output part 95
The information of the information of the operation result of integration part 91, the operation result of operation result storage part 93 is output to storage medium.It deposits
Storage media is, for example, USB storage, SD card etc..As a result, for example, by by the computing of the set time until electrical leakage breaking
As a result storage medium is output to, the movement of data becomes easy, becomes prone to determine cut-out reason.
In addition, as shown in figure 20, earth detector 100F can also possess information sending part 96, the information sending part 96
The information of the information of the operation result of integration part 91, the operation result of operation result storage part 93 is sent to external server.
As a result, for example, by the operation result of the set time until electrical leakage breaking is output to external server, using long-range
Sensor etc. also can easily grasp electric leakage situation, become prone to determine cut-out reason.
Illustrate that example and variation can enough be mutually combined to use in above-mentioned all embodiments, embodiment.With
On, it illustrates the preferred embodiment of the present invention, but the present invention is not limited to these particular implementations, power can not departed from
Carry out numerous variations and deformation, these changes and deformation fall within scope of the invention the scope of sharp claim.
Claims (51)
1. a kind of earth detector, possesses：
Zero phase current transformer, alternating current circuit penetrate through the zero phase current transformer；
Levels of leakage test section；
Second integral operational part integrates the output voltage of above-mentioned zero phase current transformer；And
Operation result output section, progress is corresponding with the operation result of above-mentioned second integral operational part to be exported,
Wherein, above-mentioned operation result output section and above-mentioned levels of leakage test section be by a module composition,
Above-mentioned levels of leakage test section possesses：
First integral operational part integrates the output voltage of above-mentioned zero phase current transformer, virtual value or average value is obtained；
Integrated value comparing section, in the case where the operation result of above-mentioned first integral operational part is more than prescribed limit, output the
One signal；
Waveform judegment part detects inflection point and the counting of the output voltage waveforms of above-mentioned zero phase current transformer, in the number of above-mentioned inflection point
Amount exports secondary signal in the case of reaching stated number；And
Detection of electrical leakage portion is being exported above-mentioned first signal by above-mentioned integrated value comparing section and is being exported by above-mentioned waveform judegment part
In the case of stating secondary signal, output represents to generate the detection of electrical leakage signal of electric leakage in above-mentioned alternating current circuit,
Wherein, above-mentioned waveform judegment part possesses：
Pulses generation portion generates pulse based on the output voltage waveforms of above-mentioned zero phase current transformer；And
Step-by-step counting portion, the quantity of the pulse to being generated by above-mentioned pulses generation portion counts, in the quantity of above-mentioned pulse
Above-mentioned secondary signal is exported in the case of reaching stated number,
Above-mentioned waveform judegment part possesses count value changing unit, and the count value changing unit is based on being generated by above-mentioned pulses generation portion
The pulse output width of pulse in the case of more than Rack, to by the count value that above-mentioned step-by-step counting portion counts to get into
Row change.
2. earth detector according to claim 1, which is characterized in that
Above-mentioned second integral operational part is used as above-mentioned first integral operational part by above-mentioned detection of electrical leakage portion.
3. earth detector according to claim 1 or 2, which is characterized in that
Compared with above-mentioned first integral operational part, above-mentioned second integral operational part is to the above-mentioned zero phase current transformer during longer
Output voltage averagely calculates average value, which is integrated.
4. earth detector according to claim 1 or 2, which is characterized in that
Operation result storage part is also equipped with, the above-mentioned second integral operational part of the operation result storage part store predetermined time quantum
The information of operation result.
5. earth detector according to claim 4, which is characterized in that
External terminal portions are also equipped with, which is used to export the operation result that above-mentioned operation result storage part is stored
Information.
6. earth detector according to claim 4, which is characterized in that
Information output part is also equipped with, the information for the operation result which is stored above-mentioned operation result storage part is defeated
Go out to storage medium.
7. earth detector according to claim 4, which is characterized in that
Information sending part is also equipped with, the information hair for the operation result which is stored above-mentioned operation result storage part
It is sent to external server.
8. earth detector according to claim 1 or 2, which is characterized in that
Above-mentioned operation result output section is more than the scope than following voltage threshold in the operation result of above-mentioned second integral operational part
Caution signal is exported in the case of narrow prescribed limit, wherein, which determined whether through above-mentioned integrated value ratio
It is used when exporting above-mentioned first signal compared with portion.
9. earth detector according to claim 8, which is characterized in that
Above-mentioned operation result output section is according to the operation result of above-mentioned second integral operational part, during to exporting above-mentioned caution signal
The way of output changes.
10. earth detector according to claim 1, which is characterized in that
Above-mentioned waveform judegment part since the output voltage of above-mentioned zero phase current transformer is positive voltage or negative voltage above-mentioned turn
The detection of point.
11. earth detector according to claim 1, which is characterized in that
Above-mentioned pulses generation portion generates above-mentioned arteries and veins in the case where the output voltage of above-mentioned zero phase current transformer is more than prescribed limit
Punching.
12. earth detector according to claim 11, which is characterized in that
Above-mentioned pulses generation portion above-mentioned zero phase current transformer output voltage be more than prescribed limit state continue the stipulated time with
In the case of upper, above-mentioned pulse is generated.
13. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
Above-mentioned pulses generation portion output voltage of above-mentioned zero phase current transformer after starting to generate above-mentioned pulse becomes less than regulation
In the case of voltage, stop the generation of above-mentioned pulse.
14. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
Above-mentioned pulses generation portion stops above-mentioned pulse in the case where have passed through the stipulated time from starting to generate above-mentioned pulse
It generates.
15. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
Above-mentioned pulses generation portion from being generated the first pulse by the stipulated time before stop the generation of the second pulse.
16. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
Above-mentioned step-by-step counting portion counts the quantity of the rising edge of the pulse generated by above-mentioned pulses generation portion, in the quantity
Above-mentioned secondary signal is exported in the case of reaching stated number.
17. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
Above-mentioned step-by-step counting portion the pulse generated by above-mentioned pulses generation portion pulsewidth to be more than Rack in the case of into
Row counts, and above-mentioned secondary signal is exported in the case where its quantity reaches stated number.
18. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
Above-mentioned step-by-step counting portion counts the quantity of the trailing edge of the pulse generated by above-mentioned pulses generation portion, in the quantity
Above-mentioned secondary signal is exported in the case of reaching stated number.
19. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
Above-mentioned step-by-step counting portion from counting the first pulse to being generated by above-mentioned pulses generation portion by the stipulated time it
The preceding counting for stopping the second pulse.
20. earth detector according to claim 1, which is characterized in that
Above-mentioned pulse output width is from the output sart point in time of the pulse generated by above-mentioned pulses generation portion to end of output
The time width at time point.
21. earth detector according to claim 1, which is characterized in that
Above-mentioned pulse output width be from the output sart point in time of the first pulse generated by above-mentioned pulses generation portion to it is upper
State the time width of the output sart point in time of continuous second pulse of the first pulse.
22. earth detector according to claim 1, which is characterized in that
Above-mentioned pulse output width be from end of output time point of the first pulse generated by above-mentioned pulses generation portion to it is upper
State the time width at the end of output time point of continuous second pulse of the first pulse.
23. earth detector according to claim 1, which is characterized in that
Above-mentioned pulse output width is from the output sart point in time of the first pulse generated by above-mentioned pulses generation portion to second
The time width at the end of output time point of pulse.
24. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
Pulses generation condition changing unit is also equipped with, which is based on being counted to get by above-mentioned step-by-step counting portion
Count value, to change the Production conditions of the pulse in above-mentioned pulses generation portion.
25. earth detector according to claim 24, which is characterized in that
Above-mentioned pulses generation condition changing unit changes at least one party in voltage threshold and pulse width threshold, wherein, the electricity
Pressure threshold value is used when judging whether above-mentioned pulses generation portion generates pulse, which determined whether to pulse
It is used when being counted.
26. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
It is the positive side based on above-mentioned zero phase current transformer that above-mentioned pulses generation portion, which generates positive side pulse and negative side pulse, the positive side pulse,
Output voltage pulse, which is the pulse of the output voltage of the negative side based on above-mentioned zero phase current transformer,
Above-mentioned step-by-step counting portion counts above-mentioned positive side pulse and above-mentioned negative side pulse, above-mentioned positive side pulse quantity and
At least one party in the quantity of above-mentioned negative side pulse is in the case of more than stated number, exports above-mentioned secondary signal.
27. according to the earth detector described in any one of claim 1,11 and 12, which is characterized in that
Be also equipped with signal input part, signal input part input for make above-mentioned integrated value comparing section export above-mentioned first signal or
Person makes the signal output indication signal of the above-mentioned secondary signal of waveform judegment part output.
28. earth detector according to claim 27, which is characterized in that
Above-mentioned signal input part inputs above-mentioned signal output indication signal from non-essential resistance.
29. a kind of earth detector, possesses：
Zero phase current transformer, alternating current circuit penetrate through the zero phase current transformer；
Levels of leakage test section；
Second integral operational part integrates the output voltage of above-mentioned zero phase current transformer；And
Operation result output section, progress is corresponding with the operation result of above-mentioned second integral operational part to be exported,
Wherein, above-mentioned operation result output section and above-mentioned levels of leakage test section be by a module composition,
Above-mentioned levels of leakage test section possesses：
First integral operational part integrates the output voltage of above-mentioned zero phase current transformer, virtual value or average value is obtained；
Integrated value comparing section, in the case where the operation result of above-mentioned first integral operational part is more than prescribed limit, output the
One signal；
Waveform judegment part detects inflection point and the counting of the output voltage waveforms of above-mentioned zero phase current transformer, in the number of above-mentioned inflection point
Amount exports secondary signal in the case of reaching stated number；And
Detection of electrical leakage portion is being exported above-mentioned first signal by above-mentioned integrated value comparing section and is being exported by above-mentioned waveform judegment part
In the case of stating secondary signal, output represents to generate the detection of electrical leakage signal of electric leakage in above-mentioned alternating current circuit,
Wherein, above-mentioned waveform judegment part possesses：
Pulses generation portion generates pulse based on the output voltage waveforms of above-mentioned zero phase current transformer；And
Step-by-step counting portion, the quantity of the pulse to being generated by above-mentioned pulses generation portion counts, in the quantity of above-mentioned pulse
Above-mentioned secondary signal is exported in the case of reaching stated number,
Above-mentioned earth detector is also equipped with pulses generation condition changing unit, which is based on by above-mentioned arteries and veins
The count value that count section counts to get is rushed, to change the Production conditions of the pulse in above-mentioned pulses generation portion.
30. earth detector according to claim 29, which is characterized in that
Above-mentioned second integral operational part is used as above-mentioned first integral operational part by above-mentioned detection of electrical leakage portion.
31. the earth detector according to claim 29 or 30, which is characterized in that
Compared with above-mentioned first integral operational part, above-mentioned second integral operational part is to the above-mentioned zero phase current transformer during longer
Output voltage averagely calculates average value, which is integrated.
32. the earth detector according to claim 29 or 30, which is characterized in that
Operation result storage part is also equipped with, the above-mentioned second integral operational part of the operation result storage part store predetermined time quantum
The information of operation result.
33. earth detector according to claim 32, which is characterized in that
External terminal portions are also equipped with, which is used to export the operation result that above-mentioned operation result storage part is stored
Information.
34. earth detector according to claim 32, which is characterized in that
Information output part is also equipped with, the information for the operation result which is stored above-mentioned operation result storage part is defeated
Go out to storage medium.
35. earth detector according to claim 32, which is characterized in that
Information sending part is also equipped with, the information hair for the operation result which is stored above-mentioned operation result storage part
It is sent to external server.
36. the earth detector according to claim 29 or 30, which is characterized in that
Above-mentioned operation result output section is more than the scope than following voltage threshold in the operation result of above-mentioned second integral operational part
Caution signal is exported in the case of narrow prescribed limit, wherein, which determined whether through above-mentioned integrated value ratio
It is used when exporting above-mentioned first signal compared with portion.
37. earth detector according to claim 36, which is characterized in that
Above-mentioned operation result output section is according to the operation result of above-mentioned second integral operational part, during to exporting above-mentioned caution signal
The way of output changes.
38. earth detector according to claim 29, which is characterized in that
Above-mentioned waveform judegment part since the output voltage of above-mentioned zero phase current transformer is positive voltage or negative voltage above-mentioned turn
The detection of point.
39. earth detector according to claim 29, which is characterized in that
Above-mentioned pulses generation portion generates above-mentioned arteries and veins in the case where the output voltage of above-mentioned zero phase current transformer is more than prescribed limit
Punching.
40. earth detector according to claim 39, which is characterized in that
Above-mentioned pulses generation portion above-mentioned zero phase current transformer output voltage be more than prescribed limit state continue the stipulated time with
In the case of upper, above-mentioned pulse is generated.
41. according to the earth detector described in any one of claim 29,39 and 40, which is characterized in that
Above-mentioned pulses generation portion output voltage of above-mentioned zero phase current transformer after starting to generate above-mentioned pulse becomes less than regulation
In the case of voltage, stop the generation of above-mentioned pulse.
42. according to the earth detector described in any one of claim 29,39 and 40, which is characterized in that
Above-mentioned pulses generation portion stops above-mentioned pulse in the case where have passed through the stipulated time from starting to generate above-mentioned pulse
It generates.
43. according to the earth detector described in any one of claim 29,39 and 40, which is characterized in that
Above-mentioned pulses generation portion from being generated the first pulse by the stipulated time before stop the generation of the second pulse.
44. according to the earth detector described in any one of claim 29,39 and 40, which is characterized in that
Above-mentioned step-by-step counting portion counts the quantity of the rising edge of the pulse generated by above-mentioned pulses generation portion, in the quantity
Above-mentioned secondary signal is exported in the case of reaching stated number.
45. according to the earth detector described in any one of claim 29,39 and 40, which is characterized in that
Above-mentioned step-by-step counting portion the pulse generated by above-mentioned pulses generation portion pulsewidth to be more than Rack in the case of into
Row counts, and above-mentioned secondary signal is exported in the case where its quantity reaches stated number.
46. according to the earth detector described in any one of claim 29,39 and 40, which is characterized in that
Above-mentioned step-by-step counting portion counts the quantity of the trailing edge of the pulse generated by above-mentioned pulses generation portion, in the quantity
Above-mentioned secondary signal is exported in the case of reaching stated number.
47. according to the earth detector described in any one of claim 29,39 and 40, which is characterized in that
Above-mentioned step-by-step counting portion from counting the first pulse to being generated by above-mentioned pulses generation portion by the stipulated time it
The preceding counting for stopping the second pulse.
48. earth detector according to claim 29, which is characterized in that
Above-mentioned pulses generation condition changing unit changes at least one party in voltage threshold and pulse width threshold, wherein, the electricity
Pressure threshold value is used when judging whether above-mentioned pulses generation portion generates pulse, which determined whether to pulse
It is used when being counted.
49. according to the earth detector described in any one of claim 29,39 and 40, which is characterized in that
It is the positive side based on above-mentioned zero phase current transformer that above-mentioned pulses generation portion, which generates positive side pulse and negative side pulse, the positive side pulse,
Output voltage pulse, which is the pulse of the output voltage of the negative side based on above-mentioned zero phase current transformer,
Above-mentioned step-by-step counting portion counts above-mentioned positive side pulse and above-mentioned negative side pulse, above-mentioned positive side pulse quantity and
At least one party in the quantity of above-mentioned negative side pulse is in the case of more than stated number, exports above-mentioned secondary signal.
50. according to the earth detector described in any one of claim 29,39 and 40, which is characterized in that
Be also equipped with signal input part, signal input part input for make above-mentioned integrated value comparing section export above-mentioned first signal or
Person makes the signal output indication signal of the above-mentioned secondary signal of waveform judegment part output.
51. earth detector according to claim 50, which is characterized in that
Above-mentioned signal input part inputs above-mentioned signal output indication signal from non-essential resistance.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-064686 | 2011-03-23 | ||
| JP2011064687A JP6065253B2 (en) | 2011-03-23 | 2011-03-23 | Earth leakage detector |
| JP2011-064687 | 2011-03-23 | ||
| JP2011064686A JP6065252B2 (en) | 2011-03-23 | 2011-03-23 | Earth leakage detector |
| CN201280014407.9A CN103430036B (en) | 2011-03-23 | 2012-03-22 | Earth detector |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280014407.9A Division CN103430036B (en) | 2011-03-23 | 2012-03-22 | Earth detector |
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|---|---|
| CN104764975A CN104764975A (en) | 2015-07-08 |
| CN104764975B true CN104764975B (en) | 2018-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201280014407.9A Active CN103430036B (en) | 2011-03-23 | 2012-03-22 | Earth detector |
| CN201510184300.4A Active CN104764975B (en) | 2011-03-23 | 2012-03-22 | Earth detector |
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| CN201280014407.9A Active CN103430036B (en) | 2011-03-23 | 2012-03-22 | Earth detector |
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| Country | Link |
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| CN (2) | CN103430036B (en) |
| TW (1) | TWI502208B (en) |
| WO (1) | WO2012127307A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3000315B1 (en) | 2012-12-20 | 2015-01-16 | Renault Sa | METHOD FOR CONTROLLING A MOTOR VEHICLE BATTERY CHARGER AND ASSOCIATED CHARGER. |
| CN103684409B (en) * | 2013-12-25 | 2016-06-22 | 上海艾为电子技术股份有限公司 | Method for transmitting signals |
| JP6708463B2 (en) * | 2016-04-01 | 2020-06-10 | ローム株式会社 | Earth leakage detection circuit and earth leakage circuit breaker |
| JP6725104B2 (en) * | 2016-04-04 | 2020-07-15 | 新日本無線株式会社 | Leakage detector |
| JP6697746B2 (en) | 2016-11-29 | 2020-05-27 | パナソニックＩｐマネジメント株式会社 | Leakage detector |
| KR102063097B1 (en) * | 2017-07-19 | 2020-01-07 | 이현창 | Electrical leak detecting apparatus and electrical leak detecting method for improving the electrical leak detecting accuracy |
| KR102017805B1 (en) | 2018-03-28 | 2019-09-03 | 엘에스산전 주식회사 | Earth leakage circuit breaker |
| KR102672226B1 (en) * | 2019-01-07 | 2024-06-05 | 엘에스일렉트릭(주) | Circuit leakage Breaker capable of output the type of the leaked current and method of control the same |
| CN110850194B (en) * | 2019-10-15 | 2020-10-30 | 上海交通大学 | Working condition simulation test circuit and method for cascaded converter submodule |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4422034A (en) * | 1980-01-22 | 1983-12-20 | Toyo Sushinki Kabushiki Kaisha | Method for measuring insulation resistance and device therefor |
| JPH0670662B2 (en) * | 1989-01-31 | 1994-09-07 | 中部電力株式会社 | Power cable ground fault prediction method |
| JPH07296708A (en) * | 1994-04-28 | 1995-11-10 | Matsushita Electric Works Ltd | Wiring breaker |
| JP3267900B2 (en) * | 1996-07-09 | 2002-03-25 | 富士電機株式会社 | Earth leakage breaker |
| KR100449959B1 (en) * | 1996-07-09 | 2004-12-08 | 후지 덴키 가부시끼가이샤 | Earth leakage breaker |
| JP2000102158A (en) * | 1998-07-24 | 2000-04-07 | Fuji Electric Co Ltd | Earth leakage circuit breaker |
| JP3788353B2 (en) * | 2002-01-24 | 2006-06-21 | 三菱電機株式会社 | Ground fault detection device for earth leakage breaker and phase control device |
| KR100638635B1 (en) * | 2005-06-02 | 2006-10-27 | (주)갑진 | Earth leakage circuit breaker |
| JP4935455B2 (en) * | 2007-03-27 | 2012-05-23 | 富士電機機器制御株式会社 | Earth leakage detector |
| JP2009081928A (en) * | 2007-09-26 | 2009-04-16 | Tempearl Ind Co Ltd | Apparatus for detecting leakage current |
| JP4931754B2 (en) * | 2007-10-03 | 2012-05-16 | 三菱電機株式会社 | Earth leakage breaker |
| JP5119063B2 (en) * | 2008-07-02 | 2013-01-16 | パナソニック株式会社 | Wiring equipment with leakage detection function |
| CN201408978Y (en) * | 2009-04-24 | 2010-02-17 | 北京Abb低压电器有限公司 | Electric leakage protector |
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2012
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| TW201245728A (en) | 2012-11-16 |
| WO2012127307A1 (en) | 2012-09-27 |
| CN103430036B (en) | 2016-03-30 |
| CN103430036A (en) | 2013-12-04 |
| TWI502208B (en) | 2015-10-01 |
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