CN104901089A - Switching voltage type leakage protection plug - Google Patents
Switching voltage type leakage protection plug Download PDFInfo
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- CN104901089A CN104901089A CN201510242011.5A CN201510242011A CN104901089A CN 104901089 A CN104901089 A CN 104901089A CN 201510242011 A CN201510242011 A CN 201510242011A CN 104901089 A CN104901089 A CN 104901089A
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- 238000000034 method Methods 0.000 claims description 38
- 230000008569 process Effects 0.000 claims description 38
- 230000008859 change Effects 0.000 claims description 23
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 21
- 229910052710 silicon Inorganic materials 0.000 claims description 21
- 239000010703 silicon Substances 0.000 claims description 21
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The present invention relates to a switching voltage type leakage protection plug which is characterized in that the switching voltage type leakage protection plug comprises a release JL, a test circuit, first and second fault current sensing circuits, an electronic switch, a fault voltage control circuit and a fault current control circuit. The first zero-sequence current transformer of the first fault current sensing circuit sleeves the zero line N and live line L of mains supply alternating current, and two ends of the transformer are electrically connected to two pins of one group of input ends of the fault current control circuit. The second zero-sequence current transformer of the second fault current sensing circuit sleeves the ground line E of the mains supply alternating current, two ends of the transformer are electrically connected to two pins of the other input end of the fault current control circuit, and two ends of the second transfer switch are electrically connected to two ends of the second zero-sequence current transformer. The output end of the electronic switch is electrically connected to the live line L of mains supply alternating current through the release JL. The input end of the fault voltage control circuit is electrically connected to the ground line E of the mains supply alternating current, and the output end of the the fault voltage control circuit and the output end of the fault current control circuit are electrically connected to the input end of the electronic switch. The switching voltage type leakage protection plug has the advantages of simple circuit structure and high safety and reliability.
Description
Technical field
The present invention relates to a kind of changing voltage type leakage protecting plug.
Background technology
Existing changing voltage type leakage protecting plug is the failure voltage signal responding to ground wire with voltage transformer; then disconnect by diverter switch and substitute the input that failure voltage signal is sent into amplification treatment circuit by current transformer; after amplifying process, be sent to control electronic switching circuit again, force the release action power-off of band three pairs of contacts.This circuit structure is complicated, also may occur that signal phase mutually superposes or offsets false voltage that (subtracting each other) cause or fault current drift and to exceed standard phenomenon, and failure voltage signal is easy to seal in other interference signal through multiple circuit such as amplifications, cause poor anti jamming capability, misoperation is serious.
Summary of the invention
The object of the invention is overcome the deficiencies in the prior art and provide a kind of circuit structure simple; i.e. property-line failure voltage signal Direct driver (need not the courses of work such as process be amplified); voltage transformer need not be increased and amplify the circuit such as process; accurately can sense the actual electrical leakage voltage of ground wire; other interference signal can also be filtered out; antijamming capability is strong, safe and reliable changing voltage type leakage protecting plug.
In order to achieve the above object, the present invention realizes like this, it is a kind of changing voltage type leakage protecting plug, it is characterized in that comprising the release JL of band three pairs of contacts, electronic switch, Fisrt fault current-sensing circuit, the second fault current sensor circuit, hookup, false voltage control circuit and fault current control circuit; Wherein
The output of described electronic switch is electrically connected with the live wire L of city's alternating current by release JL;
Three pairs of contacts of described release JL are connected on ground wire E, zero line N and live wire L respectively, and release JL also comprises the reset key that three pairs of contacts are resetted;
Described Fisrt fault current-sensing circuit comprises the first zero sequence current mutual inductor, on the zero line N that described first zero sequence current mutual inductor is set in city's alternating current and live wire L, the two ends of the first zero sequence current mutual inductor are electrically connected with the bipod of one group of input of fault current control circuit respectively;
Described second fault current sensor circuit comprises the second zero sequence current mutual inductor and the second change over switch, described second zero sequence current mutual inductor is set on the ground wire E of city's alternating current, the two ends of the second zero sequence current mutual inductor are electrically connected with the bipod of another input of fault current control circuit respectively, and the two ends of described second change over switch are electrically connected with the two ends of the second zero sequence current mutual inductor respectively;
Described electronic switch comprises rectifier diode, controllable silicon, the first electric capacity, the second electric capacity, current-limiting resistance, the second piezo-resistance and voltage stabilizing didoe; The positive pole of wherein said rectifier diode is electrically connected with the live wire L of city's alternating current by release JL, the negative pole of rectifier diode is electrically connected with one end of one end of the second piezo-resistance, controllable silicon positive pole and current-limiting resistance respectively, the other end of described current-limiting resistance is electrically connected with one end of the first electric capacity, one end of described second electric capacity and the negative pole of voltage stabilizing didoe all control pole with silicon controlled and are electrically connected, and silicon controlled controls pole and is also connected with the negative pole of the 3rd diode and the negative electricity of the 4th diode; The other end of the positive pole of silicon controlled negative pole, voltage stabilizing didoe, the other end of the first electric capacity and the second electric capacity is all electrically connected with zero line N.
In the technical program, also comprise the 4th resistance and the 6th electric capacity, the two ends after described 4th resistance and the 6th Capacitance parallel connection are connected electrically on the two ends of the first zero sequence current mutual inductor respectively.
In the technical program, also comprise the 5th resistance and the 7th electric capacity, the two ends after described 5th resistance and the 7th Capacitance parallel connection are connected electrically on two outputs of the second zero sequence current mutual inductor respectively.
Described false voltage control circuit comprises the first change over switch, the 7th resistance, the 8th electric capacity, the 3rd piezo-resistance, the 4th piezo-resistance and the 4th diode; Wherein said first change over switch, the 7th resistance, the 4th piezo-resistance and the 4th diode connect successively after one end be electrically connected with the ground wire E of city's alternating current, the other end is electrically connected with the input of electronic switch; One end electrical connection the 7th resistance and first change over switch of described 3rd piezo-resistance be connected in series a little, the other end of the 3rd piezo-resistance is electrically connected with zero line N; One end electrical connection the 7th resistance and the 4th piezo-resistance of the 8th electric capacity be connected in series a little, the other end of the 8th electric capacity is electrically connected with zero line N.
Described fault current control circuit comprises amplification process integrated package, the 3rd to the 5th electric capacity and the 3rd diode; Wherein said model of amplifying process integrated package is RT54123B, 1 pin and 2 pin that amplify process integrated package are electrically connected with the two ends of the first zero sequence current mutual inductor respectively, 2 pin and 3 pin that amplify process integrated package are electrically connected with the two ends of the second zero sequence current mutual inductor respectively, and 4 pin amplifying process integrated package are electrically connected with zero line N; The two ends of described 3rd electric capacity respectively with amplify 6 pin that process integrated package and 7 pin are electrically connected, the two ends of described 4th electric capacity respectively with amplify 4 pin that processs integrated package and 5 pin are electrically connected, the two ends of described 5th electric capacity process 2 pin of integrated package respectively with amplification and 4 pin are electrically connected; The positive pole of described 3rd diode and amplify 7 pin that process integrated package and output is electrically connected, the negative pole of the 3rd diode is electrically connected with the input of electronic switch.
Described hookup comprises Test Switchboard and test resistance, described Test Switchboard connect with test resistance after one end with pass the live wire L output of major loop instrument transformer and be electrically connected, the other end is electrically connected with zero line N input.
The present invention's advantage is compared with prior art: circuit structure is simple, voltage transformer need not be increased and amplify the circuit such as process, and ground wire voltage signal is directly added in silicon controlled control pole without circuit such as amplifications, can accurately sense ground wire electrical leakage voltage and can induced voltage be filtered out, effectively can avoid again because of amplifying circuit signal that mutually to mix misoperation that interference causes etc. bad; The ground wire false voltage treatment circuit of this circuit and fault current treatment circuit (comprising major loop and earth electrode) are independent separately in addition, do not involve mutually, can effectively avoid exceeding standard phenomenon because signal phase superposes or offset false voltage that (subtracting each other) cause or fault current drift mutually, more safe and reliable.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.It should be noted that at this, the explanation for these execution modes understands the present invention for helping, but does not form limitation of the invention.In addition, if below in described each execution mode of the present invention involved technical characteristic do not form conflict each other and just can be combined with each other.
In describing the invention, term " first " and " the 7th " only for describing object, and can not be interpreted as instruction or hint relative importance.
As shown in Figure 1, it is a kind of changing voltage type leakage protecting plug, comprises the release JL 1 of band three pairs of contacts, hookup 2, Fisrt fault current-sensing circuit 3, second fault current sensor circuit 4, electronic switch 5, false voltage control circuit 6 and fault current control circuit 7; Wherein
Three pairs of contacts of described release JL 1 are connected on ground wire E, zero line N and live wire L respectively, and release JL 1 also comprises the reset key RESET that three pairs of contacts are resetted;
Described Fisrt fault current-sensing circuit 3 comprises the first zero sequence current mutual inductor ZCT1, on the zero line N that described first zero sequence current mutual inductor ZCT1 is set in city's alternating current and live wire L, the two ends of the first zero sequence current mutual inductor ZCT1 are electrically connected with the bipod of one group of input of fault current control circuit 7 respectively;
One end of described hookup 2 is electrically connected with the zero line of city's alternating current, and the other end is electrically connected with the live wire of the city's alternating current through the first zero sequence current mutual inductor ZCT1;
Described second fault current sensor circuit 4 comprises the second zero sequence current mutual inductor ZCT2 and the second change over switch Kv2, described second zero sequence current mutual inductor ZCT2 is set on the ground wire E of city's alternating current, the two ends of the second zero sequence current mutual inductor ZCT2 are electrically connected with another bipod organizing input of fault current control circuit 7 respectively, and the two ends of described second change over switch Kv2 are electrically connected with the two ends of the second zero sequence current mutual inductor ZCT2 respectively;
That is the output of described electronic switch 51 is electrically connected with the live wire L of city's alternating current by release JL;
The input of described false voltage control circuit 6 is electrically connected with the ground wire E of city's alternating current, and the output of false voltage control circuit 6 and the output of fault current control circuit 7 are all electrically connected with the input of electronic switch 5.
Described hookup 2 comprises Test Switchboard TEST and test resistance R2, and after described Test Switchboard TEST connects with test resistance R2, one end is electrically connected with the live wire L output through major loop instrument transformer, and the other end is electrically connected with zero line N input.Process of the test: press Test Switchboard TEST, live wire L through the first zero sequence current mutual inductor ZCT1 connects input zero-power line N by test resistance R2, produce test (simulation leak current fault) current signal, and cut off the electricity supply by above-mentioned abnormal dropout process; The reset key RESET of release coordinates with test switch TEST, can also be used as mains switch and use.
In the present embodiment, described false voltage control circuit 6 comprises the first change over switch Kv1, the 7th resistance R7, the 8th electric capacity C8, the 3rd piezo-resistance Ru3, the 4th piezo-resistance Ru4 and the 4th diode D4, one end of described first change over switch Kv1 and the 3rd piezo-resistance Ru3 is in parallel, and one end is electrically connected with the ground wire E of city's alternating current after connecting successively with the 7th resistance R7, the 4th piezo-resistance Ru4 and the 4th diode D4, the other end is electrically connected with the input of electronic switch 5, and the other end of the 3rd piezo-resistance Ru3 is electrically connected with zero line N; One end electrical connection the 7th resistance R7 and the 4th piezo-resistance Ru4 of the 8th electric capacity C8 are connected in series a little, and the other end of the 8th electric capacity C8 is electrically connected with zero line N.
In the present embodiment, described fault current control circuit 7 comprises amplification process ic chip, the 3rd to the 5th electric capacity C3-C5 and the 3rd diode D3; Wherein said model of amplifying process ic chip is RT54123B, 1 pin and 2 pin that amplify process ic chip are electrically connected with the two ends of the first zero sequence current mutual inductor ZCT1 respectively, 2 pin and 3 pin that amplify process ic chip are electrically connected with the two ends of the second zero sequence current mutual inductor ZCT2 respectively, and 4 pin amplifying process ic chip are electrically connected with zero line N; The two ends of described 3rd electric capacity C3 respectively with amplify 6 pin that process ic chip and 7 pin are electrically connected, the two ends of described 4th electric capacity C4 respectively with amplify 4 pin that processs ic chip and 5 pin are electrically connected, the two ends of described 5th electric capacity C5 process 2 pin of ic chip respectively with amplification and 4 pin are electrically connected; The anode of described 3rd diode D3 and amplify 7 pin that process ic chip and output is electrically connected, the negative pole of the 3rd diode D3 is electrically connected with the input of electronic switch 5.
In the present embodiment, described electronic switch 5 comprises rectifier diode D1, controllable silicon Q, the first electric capacity C1, the second electric capacity C2, current-limiting resistance R3, the second piezo-resistance Ru2 and voltage stabilizing didoe DW; That is the positive pole of wherein said rectifier diode D1 1 is electrically connected with the live wire L of city's alternating current by release JL, the negative pole of rectifier diode D1 is electrically connected with one end of one end of the second piezo-resistance Ru2, controllable silicon Q positive pole and current-limiting resistance R3 respectively, the other end of described current-limiting resistance R3 is electrically connected with one end of the first electric capacity C1, one end of described second electric capacity C2 and the negative pole of voltage stabilizing didoe DW are all electrically connected with the control pole of controllable silicon Q, and the control pole of controllable silicon Q is also connected with the negative pole of the 3rd diode D3 and the negative electricity of the 4th diode D4; The other end of the negative pole of controllable silicon Q, the positive pole of voltage stabilizing didoe DW, the first electric capacity C1 and the other end of the second electric capacity C2 are all electrically connected with zero line N.
In the present embodiment, also comprise the 4th resistance R4 and the 6th electric capacity C6, the two ends after described 4th resistance R4 is in parallel with the 6th electric capacity C6 are connected electrically on the two ends of the first zero sequence current mutual inductor ZCT1 respectively.
In the present embodiment, also comprise the 5th resistance R5 and the 7th electric capacity C7, the two ends after described 5th resistance R5 is in parallel with the 7th electric capacity C7 are connected electrically on two outputs of the second zero sequence current mutual inductor ZCT2 respectively.
In the present embodiment, the first piezo-resistance Ru1 is also comprised; One end of described first piezo-resistance Ru1 is electrically connected with the zero line of city's alternating current, and the other end is electrically connected with the live wire of city's alternating current, and the first piezo-resistance Ru1 is used for preventing electric appliance load and this product from suffering surge voltage and lightning impulse.
Leakage current failure protection process: the first change over switch Kv1 and the second change over switch Kv2 is in off-state, if now there is leakage current fault in major loop or ground wire, be set in power line L, the first zero sequence current mutual inductor ZCT1 on N or the second zero sequence current mutual inductor ZCT2 be set on ground wire E will sense major loop or ground wire fault-current signal immediately, and send it to the input 1 amplifying process ic chip, 2 or 2, 3 pin, outputted to the control pole of controllable silicon Q by 7 pin after amplifying process, trigger controllable silicon Q conducting immediately by the both positive and negative polarity short circuit of rectifier diode D1, trip coil JL is made to produce powerful electric current (about 750mA) immediately, the tripping operation of interlock tripping mechanism, by power firestreak, zero line and earth connection cut off simultaneously, the safety of the available protecting person.
Electrical leakage voltage failure protection process: press change over switch, first change over switch Kv1 and the second change over switch Kv2 is in closed conducting state, second zero sequence current mutual inductor ZCT2 is by the second change over switch Kv2 short circuit, cut off the ground wire fault-current signal being input to and amplifying process ic chip 2,3 pin, so now no matter great fault current appears in ground connection (E) line, this mechanism (circuit) all can not action, now (change over switch Kv1, Kv2 is in closure state) if spot tape electric fault, failure voltage signal is sent to the 7th resistance R7 by the first change over switch Kv1, one end of the 4th piezo-resistance Ru4 is sent to after the 7th resistance R7 current limliting (or pressure limiting), when false voltage reaches certain value (36 ~ 50V), the instant snowslide conducting of 4th piezo-resistance Ru4, this failure voltage signal is through the after-applied control pole to controllable silicon Q of the 4th diode D4 rectification of too its serial connection, trigger controllable silicon Q conducting at once, force connect tripping coil JL rectifier diode D1 directly and negative pole (N) conducting, tripping coil JL passes through very large electric current immediately and produces high-intensity magnetic field, pull release iron core link simultaneously tripping mechanism tripping operation power-off, the misoperation that the surge voltage that 3rd piezo-resistance Ru3 can effectively prevent ground wire from responding to causes, 8th electric capacity C8 can absorb (bypass) high-frequency interferencing signal further, makes work more reliable, voltage stabilizing didoe DW then damages from high-voltage impact for the protection of controllable silicon.
Below by reference to the accompanying drawings detailed description is made to embodiments of the present invention, but the present invention is not limited to described execution mode.For the ordinary skill in the art, carry out multiple change, amendment, replacement and distortion when not departing from principle of the present invention and aim to these execution modes still to fall within protection scope of the present invention.
Claims (7)
1. a changing voltage type leakage protecting plug, is characterized in that the release JL(1 comprising band three pairs of contacts), hookup (2), Fisrt fault current-sensing circuit (3), the second fault current sensor circuit (4), electronic switch (5), false voltage control circuit (6) and fault current control circuit (7); Wherein
Described release JL(1) three pairs of contacts be connected on ground wire E, zero line N and live wire L respectively, release JL(1) also comprise the reset key (RESET) that the three pairs of contacts are resetted;
Described Fisrt fault current-sensing circuit (3) comprises the first zero sequence current mutual inductor (ZCT1), on the zero line N that described first zero sequence current mutual inductor (ZCT1) is set in city's alternating current and live wire L, the two ends of the first zero sequence current mutual inductor (ZCT1) are electrically connected with the bipod of one group of input of fault current control circuit (7) respectively;
One end of described hookup (2) is electrically connected with the zero line input of city's alternating current, and the other end is electrically connected with the fire wire output end of the city's alternating current through the first zero sequence current mutual inductor (ZCT1);
Described second fault current sensor circuit (4) comprises the second zero sequence current mutual inductor (ZCT2) and the second change over switch (Kv2), described second zero sequence current mutual inductor (ZCT2) is set on the ground wire E of city's alternating current, the two ends of the second zero sequence current mutual inductor (ZCT2) are electrically connected with the bipod of another input of fault current control circuit (7) respectively, and the two ends of described second change over switch (Kv2) are electrically connected with the two ends of the second zero sequence current mutual inductor (ZCT2) respectively;
The output of described electronic switch (5) is by release JL(1) be electrically connected with the live wire L of city's alternating current;
The described input of false voltage control circuit (6) is electrically connected with the ground wire E of city's alternating current, and the output of false voltage control circuit (6) and the output of fault current control circuit (7) are all electrically connected with the input of electronic switch (5).
2. changing voltage type leakage protecting plug according to claim 1, is characterized in that false voltage control circuit (6) comprises the first change over switch (Kv1), the 7th resistance (R7), the 8th electric capacity (C8), the 3rd piezo-resistance (Ru3), the 4th piezo-resistance (Ru4) and the 4th diode (D4); Wherein said first change over switch (Kv1), the 7th resistance (R7), the 4th piezo-resistance (Ru4) and the 4th diode (D4) connect successively after one end be electrically connected with the ground wire E of city's alternating current, the other end is electrically connected with the input of electronic switch (5); One end electrical connection the 7th resistance (R7) and first change over switch (Kv1) of described 3rd piezo-resistance (Ru3) be connected in series a little, the other end of the 3rd piezo-resistance (Ru3) is electrically connected with zero line N; One end electrical connection the 7th resistance (R7) and the 4th piezo-resistance (Ru4) of the 8th electric capacity (C8) be connected in series a little, the other end of the 8th electric capacity (C8) is electrically connected with zero line N.
3. changing voltage type leakage protecting plug according to claim 1, is characterized in that described fault current control circuit (7) comprises and amplifies process integrated package (IC), the 3rd to the 5th electric capacity (C3-C5) and the 3rd diode (D3); Wherein said model of amplifying process integrated package (IC) is RT54123B, 1 pin and 2 pin that amplify process integrated package (IC) are electrically connected with the two ends of the first zero sequence current mutual inductor (ZCT1) respectively, 2 pin and 3 pin that amplify process integrated package (IC) are electrically connected with the two ends of the second zero sequence current mutual inductor (ZCT2) respectively, and 4 pin amplifying process integrated package (IC) are electrically connected with zero line N; The two ends of described 3rd electric capacity (C3) respectively with amplify 6 pin that process integrated package (IC) and 7 pin are electrically connected, the two ends of described 4th electric capacity (C4) respectively with amplify 4 pin that processs integrated package (IC) and 5 pin are electrically connected, the two ends of described 5th electric capacity (C5) process 2 pin of integrated package (IC) respectively with amplification and 4 pin are electrically connected; The positive pole of described 3rd diode (D3) and amplify 7 pin that process integrated package (IC) and output is electrically connected, the negative pole of the 3rd diode (D3) is electrically connected with the input of electronic switch (5).
4. the changing voltage type leakage protecting plug according to claim 1 or 2 or 3, is characterized in that described electronic switch (5) comprises rectifier diode (D1), controllable silicon (Q), the first electric capacity (C1), the second electric capacity (C2), current-limiting resistance (R3), the second piezo-resistance (Ru2) and voltage stabilizing didoe (DW), the positive pole of wherein said rectifier diode (D1) is by release JL(1) be electrically connected with the live wire L of city's alternating current, the negative pole of rectifier diode (D1) respectively with one end of the second piezo-resistance (Ru2), one end electrical connection of controllable silicon (Q) positive pole and current-limiting resistance (R3), the other end of described current-limiting resistance (R3) is electrically connected with one end of the first electric capacity (C1), one end of described second electric capacity (C2) and the negative pole of voltage stabilizing didoe (DW) are all electrically connected with the control pole of controllable silicon (Q), the control pole of controllable silicon (Q) is also connected with the negative pole of the 3rd diode (D3) and the negative electricity of the 4th diode (D4), the negative pole of controllable silicon (Q), the positive pole of voltage stabilizing didoe (DW), the other end of the first electric capacity (C1) and the other end of the second electric capacity (C2) are all electrically connected with zero line N.
5. changing voltage type leakage protecting plug according to claim 1; characterized by further comprising the 4th resistance (R4) and the 6th electric capacity (C6), the two ends after described 4th resistance (R4) is in parallel with the 6th electric capacity (C6) are connected electrically on the two ends of the first zero sequence current mutual inductor (ZCT1) respectively.
6. changing voltage type leakage protecting plug according to claim 1; characterized by further comprising the 5th resistance (R5) and the 7th electric capacity (C7), the two ends after described 5th resistance (R5) is in parallel with the 7th electric capacity (C7) are connected electrically on two outputs of the second zero sequence current mutual inductor (ZCT2) respectively.
7. changing voltage type leakage protecting plug according to claim 1; it is characterized in that described hookup (2) comprises Test Switchboard (TEST) and test resistance (R2); described Test Switchboard (TEST) connect with test resistance (R2) after one end with pass the live wire L output of major loop instrument transformer and be electrically connected, the other end is electrically connected with zero line N input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242011.5A CN104901089B (en) | 2015-05-13 | 2015-05-13 | Change voltage-type leakage protecting plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242011.5A CN104901089B (en) | 2015-05-13 | 2015-05-13 | Change voltage-type leakage protecting plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104901089A true CN104901089A (en) | 2015-09-09 |
| CN104901089B CN104901089B (en) | 2017-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510242011.5A Expired - Fee Related CN104901089B (en) | 2015-05-13 | 2015-05-13 | Change voltage-type leakage protecting plug |
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| CN (1) | CN104901089B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901090A (en) * | 2015-06-01 | 2015-09-09 | 佛山市顺德区信辉达电子有限公司 | Voltage conversion type earth leakage protection plug |
| CN105958440A (en) * | 2016-06-29 | 2016-09-21 | 常熟市立得电器有限公司 | Tripolar disconnection leakage protection plug |
| CN106169733A (en) * | 2016-06-07 | 2016-11-30 | 佛山市顺德区信辉达电子有限公司 | Conversion voltage-type leakage protecting plug |
| CN108539538A (en) * | 2018-04-07 | 2018-09-14 | 佛山市顺德区信辉达电子有限公司 | Three pole break-make leakage protecting plugs |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202159853U (en) * | 2011-03-25 | 2012-03-07 | 深圳市喻深鸿电气科技有限公司 | Intelligent socket |
| CN202940393U (en) * | 2012-11-16 | 2013-05-15 | 珠海格力电器股份有限公司 | Leakage protection plug |
| CN104505667A (en) * | 2014-12-26 | 2015-04-08 | 佛山市顺德区信辉达电子有限公司 | Voltage conversion type leakage protection plug |
| CN204597142U (en) * | 2015-05-13 | 2015-08-26 | 佛山市顺德区信辉达电子有限公司 | Changing voltage type leakage protecting plug |
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2015
- 2015-05-13 CN CN201510242011.5A patent/CN104901089B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202159853U (en) * | 2011-03-25 | 2012-03-07 | 深圳市喻深鸿电气科技有限公司 | Intelligent socket |
| CN202940393U (en) * | 2012-11-16 | 2013-05-15 | 珠海格力电器股份有限公司 | Leakage protection plug |
| CN104505667A (en) * | 2014-12-26 | 2015-04-08 | 佛山市顺德区信辉达电子有限公司 | Voltage conversion type leakage protection plug |
| CN204597142U (en) * | 2015-05-13 | 2015-08-26 | 佛山市顺德区信辉达电子有限公司 | Changing voltage type leakage protecting plug |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901090A (en) * | 2015-06-01 | 2015-09-09 | 佛山市顺德区信辉达电子有限公司 | Voltage conversion type earth leakage protection plug |
| CN106169733A (en) * | 2016-06-07 | 2016-11-30 | 佛山市顺德区信辉达电子有限公司 | Conversion voltage-type leakage protecting plug |
| CN105958440A (en) * | 2016-06-29 | 2016-09-21 | 常熟市立得电器有限公司 | Tripolar disconnection leakage protection plug |
| CN108539538A (en) * | 2018-04-07 | 2018-09-14 | 佛山市顺德区信辉达电子有限公司 | Three pole break-make leakage protecting plugs |
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| Publication number | Publication date |
|---|---|
| CN104901089B (en) | 2017-07-14 |
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