CN201497772U - A type current sensor structure for meter measurement - Google Patents
A type current sensor structure for meter measurement Download PDFInfo
- Publication number
- CN201497772U CN201497772U CN200920132572XU CN200920132572U CN201497772U CN 201497772 U CN201497772 U CN 201497772U CN 200920132572X U CN200920132572X U CN 200920132572XU CN 200920132572 U CN200920132572 U CN 200920132572U CN 201497772 U CN201497772 U CN 201497772U
- Authority
- CN
- China
- Prior art keywords
- shielding box
- primary winding
- current sensor
- coil
- sensor structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005259 measurement Methods 0.000 title description 3
- 238000004804 winding Methods 0.000 claims abstract description 74
- 125000006850 spacer group Chemical group 0.000 claims abstract description 15
- 238000010292 electrical insulation Methods 0.000 claims abstract description 3
- 230000005291 magnetic effect Effects 0.000 claims description 32
- 238000012216 screening Methods 0.000 claims description 28
- 239000012212 insulator Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 229920006351 engineering plastic Polymers 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000004417 polycarbonate Substances 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 238000013461 design Methods 0.000 description 12
- 239000011162 core material Substances 0.000 description 11
- 238000009413 insulation Methods 0.000 description 10
- 238000005452 bending Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000005292 diamagnetic effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Images
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
For metering by meters
A current sensor structure of the type comprising primary (10, 10 ') and secondary (20, 20') coils, both coils comprising an incoming terminal (13, 13 ') and an outgoing terminal (14, 14'); in particular a shielding box (30, 30 '), a shielding cover (40, 40 ') and an insulating spacer (50, 50 '); the primary coil (10, 10') comprises two turns connected in series in opposite directions and having the same shape; the secondary coil (20, 20') comprises two series windings with the same shape and the same number of turns but opposite winding directions, and the two windings are connected in series in a mode of superposition of induced potentials; the primary coil (10, 10 ') is placed in a shielding case (30, 30 '), a shielding cover (40, 40 ') covers the opening of the shielding case (30, 30 ') to close the opening, only the incoming terminals (13, 13 ') and the outgoing terminals (14, 14 ') extend out of the case, and the secondary coil (20, 20 ') is fixed in the cavity of the primary coil (10, 10 ') or above the plane of the coil, and an insulating spacer (50, 50 ') is arranged between the primary coil and the secondary coil for electrical insulation. The utility model discloses the commonality is strong, with low costs, the interference killing feature is strong.
Description
Technical field the utility model relates to and is used to the device measuring curtage or be used to indicate its existence or symbol, particularly relates to being used for metering instrument
Type current sensor structure.
The current sample part of background technology prior art electronic electric energy meter adopts copper-manganese resistance summation current transformer CT usually, the former advantage be cheap, make simple, but since three isolated very difficult and electric currents when big heating serious, so only be used for single-phase electric energy meter.The latter generally adopts on three-phase electric energy meter, CT needs the annular core that magnetoconductivity is high, no matter adopting iron-nickel alloy still be amorphous alloy body material, its cost is all very high, and volume is very big during especially for current specification greatly, and low-temperature characteristics is relatively poor, when temperature below-15 ℃ the time, angular difference can obviously increase, and accuracy of measurement is descended, and iron core needs thermal treatment, and the different batches otherness is bigger.Main is, when wanting to meet national standard about the regulation of direct current in the alternating circuit and even-order harmonic influence, core material must be very special and expensive material, the maximum current of producing as German VAC company is that the price of the E4626 type CT of 100A is 3～4 times of domestic common mutual inductor, the domestic CT that can meet this requirement has selected for use the magnetic core of two kinds of different materials to lump together use, and number of secondary turns is higher than 2.5 times of common CT, also can only power factor be 1 o'clock qualified, and error can increase severely under other phase places.
Prior art also has a kind of AC sampling device, promptly
Current sensor, its principle of work are to utilize two mutual inductance couplings between the air core coil, when primary winding passes through sinusoidal alternating current i
1Afterwards, produce the mutual inductance electromotive force at inferior coil
M in the formula is a coefficient of mutual inductance, and one timing M is exactly a constant when structure.As seen, e
2With
Be directly proportional e
2Also being sinusoidal quantity, is phase place and i
1Differ 90 °, this phase shift and frequency gain can both give accurate reduction by the digital integrator in the electric energy computation chip (ADE7758, ADE7169, ADE78 series etc.).
Because
Current sensor does not have ferromagnetic medium, and secondary direct voltage output signal need not to add sample resistance, so stability is high, good, the high conformity of the linearity, overload capacity is extremely strong, and direct current and even-order harmonic almost do not have influence under any phase place, all can accurately change metering, with low cost, therefore, use
Current sensor is more obvious than using the CT advantage.But, because
Current sensor is to be made of air core coil, and a little less than himself magnetic field, therefore, diamagnetic interference performance is very poor.At present external
The type current sensor all is the different structure needs according to instrument, designs multi-form special use
Current sensor is about to
Current sensor and electronic electric energy meter carry out whole co-design to reduce or to avoid interference, and the power supply mode that adopts resistance-capacitance depressurization or high frequency switch power substitutes transformer-supplied commonly used to avoid disturbing magnetic field occurring in the table, as the E420-ns type three-phase electric energy meter of Finland ENERMET company production more.Such design certainly will improve cost of products, prolong the product design cycle, and versatility is very poor, and also higher to designer's design level requirement, and the power grid quality of adding China is not good, and capacitance-resistance power supply and Switching Power Supply are not accepted by the user at home.At present, domestic existing Wuhan Glan is if the G100 type Rogowski current transformer that photo-electricity mutual-inductor company limited produces is output as
Signal, but it is not an air core coil, but adopt special material to make the toroidal core of opening is filled in printed coil that a slice made by multilayer circuit board as secondary coil at opening part.Though this product has magnetic core to solve the magnetic interference problem, and the common current mutual inductor do not have the difference of matter, and not but still have some deficiency of conventional current mutual inductor, and price is not 1.5 times of the common CT of same specification yet.
In sum, prior art adopts copper-manganese resistance and traditional CT as the current sample part, and adopts
All there is weak point in current sensor as the electronic electric energy meter of current sample part, and the former is, and cost is higher, volume is big, the accuracy of measurement fluctuation is big; The latter then is that diamagnetic interference is poor, and solve diamagnetic interference needs again to carry out overall construction design with electric energy meter table body, causes cost higher, and therefore, cost performance is not high.
Utility model content the technical problems to be solved in the utility model is to avoid above-mentioned the deficiencies in the prior art part, and prior art is done further improvement, propose that a kind of antijamming capability is strong, cost is low, volume is little, cost performance is high, and highly versatile be used for metering instrument
Type current sensor structure.
For the technical scheme that solve the technical problem employing is, design a kind of metering instrument that is used for
Type current sensor structure comprises primary winding and time coil, and described primary winding includes line end and leading-out terminal; Especially,
Also comprise shielding box, screening cover, insulator spacer; Described primary winding comprises two differential concatenations wire turn that connect, just the same shape; Described coil comprises that two shapes, the number of turn are the same, but direction of winding is opposite, and two windings of series connection mutually, and this two winding mode of series connection mutually should be that induced potential superposes mutually; Described primary winding places in the shielding box, screening cover is placed on shielding box uncovered, makes it sealing, only has lead-in wire terminal and leading-out terminal to stretch out outside the box, described coil stationary has insulator spacer to make electrical isolation between described primary winding and the inferior coil in primary winding chamber or on this coil plane.
Two differential concatenations of described primary winding wire turn that connect, just the same shape is the horseshoe clamp upper thread circle of upward opening, in parallel to each other, vertically place described shielding box, the center facade of this shielding box is the mirror image symmetry relatively, and is connected in series mutually on top with horizontal stripe; Described wire turn outwards bends 90 ° without the free end of connection on top, also respectively bends 90 ° outside again twice downwards again, is formed into line end and leading-out terminal; The winding that two of described coil is connected in series is contained in respectively in the U-shaped chamber of described wire turn, and the central axis of winding roughly overlaps with the central axis of wire turn.Also comprise secondary magnetic shielding box, described shielding box is fixed therein by built-in electrical insulation plastics cutting ferrule.
Two differential concatenations of described primary winding wire turn that connect, just the same shape is a S shape plane wire turn, place on the same plane in the described shielding box, the longitudinal centre line on this plane is the mirror image symmetry relatively, and be connected in series mutually with S shape respective end portions separately, constitute a complete circle and two half turns; Described wire turn at first upwards bends 90 ° without the free end of connection, outwards bends 90 ° again, is formed into line end and leading-out terminal; The winding that two of described coil is connected in series is the printing winding that is produced on the same multilayer board, place equally in the described shielding box, but be positioned on described primary winding, the central axis of winding roughly overlaps respectively with the central axis of synthetic equivalence one circle of the complete circle of primary winding and two half turns.
Also comprise the electrostatic screening layer, this electrostatic screening is placed between described primary winding and the inferior coil, is used for preventing the Disturbance in Power Net that primary winding brings, and the extension line of described electrostatic screening layer connects the reference ground of electronic circuit.
The material of described insulator spacer be polycarbonate engineering plastic or and electrostatic screening is laminated and together cover copper ring oxygen glass-cloth board.
The material of described shielding box, screening cover and secondary magnetic shielding box is a mild carbon steel.
Go back the injection ring epoxy resins in described shielding box and the secondary magnetic shielding box and carry out whole sealing.
Each medial surface spacing of wire turn ragged edge of described primary winding and shielding box is all greater than 2.5mm, and the spacing of its lead-in wire terminal and leading-out terminal and shielding box medial surface and screening cover is greater than 1mm, so that reach best shield effectiveness.
Compared with prior art, the utlity model has following beneficial effect:
1, antijamming capability is strong; The utility model primary winding and time coil adopt shape, number of turn symmetry, and both around on the contrary, in primary winding current i
1Coil excitation next time produce induced potential e '
2And e "
2, its equal and opposite in direction, direction is identical, according to the differential type complementation that two negatives make a positive, total output AC e
2=e '
2+ e "
2Twice for each secondary coil induced potential, when external magnetic field is invaded, the induced potential equal and opposite in direction that in two time coils, is produced ideally, direction is opposite, both subtract each other and are zero, and in fact external interference magnetic field can not be evenly absolute, the big or small direction of passing two coils can not be in full accord, but owing to used the magnetic shielding of special construction, primary winding and time coil are all placed the magnetic shielding box fully, the exit of primary winding adopts wrap direction to draw from shielding box, and like this, external magnetic field can't enter
Converter, a little leakage field has been eliminated interference basically because the complementation of inner two circles time coil to outside influence of magnetic field arranged, and therefore, the utility model antijamming capability in magnetic field to external world is strong.
2, cost is low; The utility model do not need with
Current sensor cooperates electronic electric energy meter integral body to carry out structural design, need not to adopt any valuable starting material and rare metal, do not use magnetic core, and the fine copper wire consumption of inferior coil (Wound-rotor type) also is 30% of same specification CT, magnetic shielding material uses mild carbon steel to get final product as No. 10 steel, and therefore, that has avoided not only that independent design brings is expensive, also reduced material cost, whole cost is lower.
3, volume is little, cost performance is high; The utility model only with primary winding and time coil overall package in shielding box, use be air core coil, volume is very little, and what adopt all is common material, does not need to use magnetic core, therefore, cost performance is very high.
4, highly versatile; Replace existing current transformer CT owing to adopted modular design, the utility model can use in the existing electronic electric energy meter of the overwhelming majority except that global design, can be used for the electric energy meter of the most frequently used transformer-supplied fully.
Description of drawings
Fig. 1 is the main cut-open view of looking of the orthogonal projection of the utility model preferred embodiment one.
Fig. 2 is that semisectional view is looked on the left side of described preferred embodiment one.
Fig. 3 is the semisectional view of overlooking of described preferred embodiment one.
Fig. 4 is the main cut-open view of looking of the orthogonal projection of the utility model preferred embodiment two.
Fig. 5 is that semisectional view is looked on the left side of described preferred embodiment two.
Fig. 6 is the semisectional view of overlooking of described preferred embodiment two.
Embodiment is described in further detail below in conjunction with each preferred embodiment shown in the accompanying drawing.
Embodiment one: as shown in Figure 1 to Figure 3, the utility model is used for metering instrument
Type current sensor structure comprises primary winding 10, inferior coil 20, shielding box 30, screening cover 40, insulator spacer 50 and electrostatic screening layer 6; Primary winding 10 includes line end 13 and leading-out terminal 14; Primary winding 10 is by two differential concatenations wire turn 11,12 that connect, just the same shape, the U type plane wire turn that this two wire turn is a upward opening, in parallel to each other, vertically place shielding box 30, relatively the center facade 33 of this shielding box 30 is the mirror image symmetry, and is connected in series mutually on top with horizontal stripe 16.Two its shapes of inferior coil 20 usefulness high strength enamelled wire coileds, the number of turn are all the same and around to opposite coil winding 21,22, after being connected in series, order places two primary winding U type opening wire turns respectively, the insulator spacer made from the polycarbonate engineering plastic of high insulation resistance between described former, the inferior coil 50 isolation of reliably insulating, the insulator spacer 50 here is a kind of insulation isolating frame according to shaped design former, inferior coil, its four grains closely contact with primary winding 10 with shielding box 30, play fixation, dielectric strength is higher than 2kv; The electrostatic screening layer 6 that also has one deck to make of copper belt between primary winding 10 and inferior coil 20 is used for preventing the Disturbance in Power Net brought by primary winding 10 from its extension line being connect electronic circuit with reference to ground; The wire turn 11,12 of primary winding 10 outwards bends 90 ° without the free end of connection on top, and downward again and outside twice bending is formed into line end 13 and leading-out terminal 14 for 90 °, and this lead-in wire terminal 13 and leading-out terminal 14 levels are drawn; Screening cover 40 is placed on the shielding box 30, and length is longer than shielding box 30, its epitaxial part that grows shielding box 30 bends 90 ° downwards, form totally-enclosed reliably, almost all conductively-closeds of external magnetic field have been guaranteed like this, the magnetic line of force that may be penetrated by the lead-in wire terminal 13 and leading-out terminal 14 places of primary winding 10 will enter magnetic coil and must pass through twice 90 ° of bendings, and this possibility does not almost have; Simultaneously, in order to guarantee protection against the tide, anticorrosion, shockproof and shock resistance, after mounted inside was finished, also the injection ring epoxy resins was carried out whole sealing in shielding box 30.In addition, corresponding shielding box 30 each the medial surface spacing of the U-shaped wire turn of described primary winding 10 are all greater than 2.5mm, and designing like this is to make shielding box 30 only externally play magnetic screening action, to inside
The basic not influence of conversion makes whole conversion be desirable hollow state, thereby guarantees
The advantage of current sensor finds full expression, lead-in wire terminal 13 and leading-out terminal 14 then with the spacing of shielding box 30 medial surfaces and screening cover 40 greater than 1mm, the above reliable insulation of 1kv is arranged.
When if the power consumption of electric energy meter is bigger than normal, the magnetic field that power transformer produces is strong or when being used for the above high-precision meter of 0.5S, also can increase a secondary magnetic shielding box 31, this pair magnetic shielding box 31 is built-in with an ambroin cutting ferrule 311, be used for shielding box 30 is fixed therein, and fixed with the filling of epoxy resin envelope.
Stipulate according to static electric energy meter relevant criterion (GB/T-17215, IEC61036), when field intensity is under the external magnetic field influence of 0.5 milli tesla, under worst phase place and direction, the error change amount of 1 grade and 2 grades electric energy meter is respectively less than ± 2% and ± 3%, and present embodiment
Current sensor satisfies the requirement of 1 grade and 2 grades electric energy meter fully less than ± 1.5%.After increasing above-mentioned secondary magnetic shielding box, under the external magnetic field of 0.5 milli tesla its influence almost nil, can be used for 0.5S level three-phase multifunctional table (the standard code specification error changes less than ± 1%) fully.Present embodiment has also been done the interphase interference test of three-phase table, when the A phase
Current sensor passes to 0.5A (5%Ib) electric current, and B passes to 10A (I mutually
b) behind the electric current, A only produces 0.1% error mutually and changes, and when doing same experiment with Finland's E420-ns three-phase electric energy meter, A meets and produces 4% error change, by contrast, the effect of present embodiment is more obvious.
Embodiment two: to shown in Figure 6, the utility model is used for metering instrument as Fig. 4
Type current sensor structure comprises primary winding 10 ', inferior coil 20 ', shielding box 30 ', screening cover 40 ', insulator spacer 50 ' and electrostatic screening layer 6; Primary winding 10 ' also includes line end 13 ' and leading-out terminal 14 '; Primary winding 10 ' by two differential concatenations connect, the S shape plane wire turn 11 ', 12 ' of just the same shape forms, the longitudinal centre line 33 ' on this plane is the mirror image symmetry relatively, and be connected in series mutually with S shape respective end portions separately, constitute a complete circle A and two half turn B1, B2; Described wire turn 11 ', the 12 ' free end without connection at first upwards bend 90 °, outwards bend 90 ° again, are formed into line end 13 ' and leading-out terminal 14 '; Described time coil 20 ' comprises two windings 21 ' that are connected in series, 22 ', two windings are the printing windings that are produced on the same multilayer board, place in the described shielding box 30 ', but be positioned on described primary winding 10 ', the central axis of winding 21 ', 22 ' is with primary winding 10 ' complete a circle A and two half turn B1, and the central axis of the equivalence one circle B that B2 is synthetic roughly overlaps respectively.This two S shape ring places in the shielding box 30 ' at a surface level and level, described insulator spacer 50 ' is a kind of insulation division board, this insulation division board is made with the expoxy glass silk fabric board, also has electrostatic screening layer 6 between former, the inferior coil, it adopts, and copper-clad method realizes on the insulation division board, so insulator spacer 50 ' and electrostatic screening layer 6 combine and be a kind of copper ring oxygen glass fiber fabric swatch that covers, the insulation division board makes has the above insulation of 2kv to isolate between former, inferior coil.In addition, former for making, inferior coil 10 ', 20 ' is fixed in the shielding box 30 ', primary winding 10 ' bottom also the polycarbonate engineering plastic of useful high insulation resistance make set off 51 ', set off 51 ' and play fixation and and shielding box 30 ' insulation.Screening cover 40 ' is shorter than shielding box 30 ' and is placed on the shielding box 30 ', though screening cover 40 ' length is shorter than shielding box 30 ', but surround time coil 20 ' because shielding box 30 ' inside is goed deep in the downward bending in its end, therefore, also can realize the same with embodiment one reliably totally-enclosed.The parallel one side in described primary winding 10 ' and shielding box 30 ' bottom and shielding box 30 ' medial surface spacing are greater than 2.5mm, the spacing of lead-in wire terminal 13 ' and appearance end 14 ' exit and shielding box 30 ' medial surface, screening cover 40 ' is greater than 1mm, after mounted inside was finished, equally also the injection ring epoxy resins was carried out whole sealing in shielding box 30 '.The lead-in wire terminal 13 ' and the leading-out terminal 14 ' of primary winding 10 ' are drawn through twice 90 ° of bending levels, and the external disturbance magnetic line of force that enters from lead-in wire terminal 13 ' and leading-out terminal 14 ' also can't pass time coil 20 ' through twice 90 ° of bendings.
Claims (10)
1. one kind is used for metering instrument
Type current sensor structure comprises primary winding (10,10 ') and time coil (20,20 '), and described primary winding (10,10 ') includes line end (13,13 ') and leading-out terminal (14,14 '); It is characterized in that:
Also comprise shielding box (30,30 '), screening cover (40,40 '), insulator spacer (50,50 '); Described primary winding (10,10 ') comprises two differential concatenations wire turn (11,12 that connect, just the same shape; 11 ', 12 '); Described coil (20,20 ') comprises that two shapes, the number of turn are the same, but direction of winding is opposite, and two windings (21,22 of series connection mutually; 21 ', 22 '), this two winding (21,22; 21 ', 22 ') mode of series connection should be that induced potential superposes mutually mutually; Described primary winding (10,10 ') places in the shielding box (30,30 '), screening cover (40,40 ') is placed on shielding box (30,30 ') uncovered, make it sealing, lead-in wire terminal (13,13 ') and leading-out terminal (14 are only arranged, 14 ') stretch out outside the box, described coil (20,20 ') is fixed in primary winding (10,10 ') in the chamber or on this coil plane, described primary winding (10,10 ') and time coil (20,20 ') there is insulator spacer (50,50 ') to make electrical isolation between.
2. the metering instrument that is used for according to claim 1
Type current sensor structure is characterized in that:
Two differential concatenations of described primary winding (10) wire turn (11 that connect, just the same shape, 12) be the horseshoe clamp upper thread circle of upward opening, in parallel to each other, vertically place described shielding box (30), the center facade (33) of this shielding box (30) is the mirror image symmetry relatively, and is connected in series mutually on top with horizontal stripe (16); Described wire turn (11,12) outwards bends 90 ° without the free end of connection on top, also respectively bends 90 ° outside again twice downwards again, is formed into line end (13) and leading-out terminal (14); Two windings that are connected in series (21,22) of described coil (20) are contained in respectively in the U-shaped chamber of described wire turn (11,12), and the central axis of the same wire turn of central axis (11,12) of winding (21,22) roughly overlaps.
3. the metering instrument that is used for according to claim 2
Type current sensor structure is characterized in that: also comprise secondary magnetic shielding box (31), by built-in electrical insulation plastics cutting ferrule (311) described shielding box (30) is fixed therein.
4. the metering instrument that is used for according to claim 2
Type current sensor structure is characterized in that: the material of described insulator spacer (50) is a polycarbonate engineering plastic.
5. the metering instrument that is used for according to claim 1
Type current sensor structure is characterized in that:
Two differential concatenations of described primary winding (10 ') wire turn (11 ' that connect, just the same shape, 12 ') be S shape plane wire turn, place on the same plane in the described shielding box (30 '), the longitudinal centre line (33 ') on this plane is the mirror image symmetry relatively, and be connected in series mutually with S shape respective end portions separately, constitute a complete circle (A) and two half turns (B1, B2); Described wire turn (11 ', 12 ') at first upwards bends 90 ° without the free end of connection, outwards bends 90 ° again, is formed into line end (13 ') and leading-out terminal (14 '); The winding (21 ' that two of described coil (20 ') is connected in series, 22 ') be the printing winding of manufacturing on same multilayer board, place equally in the described shielding box (30 '), but be positioned on described primary winding (10 '), winding (21 ', 22 ') (B1, B2) central axis of synthetic equivalence one circle (B) roughly overlaps respectively for the circle (A) that same primary winding of central axis (10 ') is complete and two half turns.
6. according to claim 1, the 2 or 5 described metering instruments that are used for
Type current sensor structure, it is characterized in that: also comprise electrostatic screening layer (6), this electrostatic screening layer (6) places described primary winding (10,10 ') and time coil (20,20 ') between, be used for preventing the Disturbance in Power Net that primary winding (10,10 ') brings, the extension line of described electrostatic screening layer (6) connects the reference ground of electronic circuit.
7. the metering instrument that is used for according to claim 5
Type current sensor structure is characterized in that: the material of described insulator spacer (50 ') is the expoxy glass silk fabric board.
8. according to claim 1,2, the 3 or 5 described metering instruments that are used for
Type current sensor structure is characterized in that:
The material of described shielding box (30,30 '), screening cover (40,40 ') and secondary magnetic shielding box (31) is a mild carbon steel.
9. according to claim 1,2, the 3 or 5 described metering instruments that are used for
Type current sensor structure is characterized in that:
Go back the injection ring epoxy resins in described shielding box (30,30 ') and the secondary magnetic shielding box (31) and carry out whole sealing.
10. the metering instrument that is used for according to claim 1
Type current sensor structure, it is characterized in that: described primary winding (10,10 ') wire turn ragged edge and shielding box (30,30 ') each medial surface spacing is all greater than 2.5mm, its lead-in wire terminal (13,13 ') and leading-out terminal (14,14 ') and shielding box (30,30 ') spacing of medial surface and screening cover (40,40 ') is greater than 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920132572XU CN201497772U (en) | 2009-05-31 | 2009-05-31 | A type current sensor structure for meter measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920132572XU CN201497772U (en) | 2009-05-31 | 2009-05-31 | A type current sensor structure for meter measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201497772U true CN201497772U (en) | 2010-06-02 |
Family
ID=42440976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920132572XU Expired - Fee Related CN201497772U (en) | 2009-05-31 | 2009-05-31 | A type current sensor structure for meter measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201497772U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102479609A (en) * | 2010-11-24 | 2012-05-30 | 通用电气公司 | Magnetic shield for current transformer in electronic watt-hour meter |
| CN103439547A (en) * | 2013-09-12 | 2013-12-11 | 南京能瑞自动化设备股份有限公司 | Intelligent electric meter relay support assembly capable of eliminating power frequency magnetic field interference |
| CN106980036A (en) * | 2016-01-16 | 2017-07-25 | 龙妍利 | Total solids holography high-tension current potential sensor |
| WO2018099153A1 (en) * | 2016-11-29 | 2018-06-07 | 杭州海兴电力科技股份有限公司 | Current transformer |
| CN109001503A (en) * | 2017-06-07 | 2018-12-14 | 日置电机株式会社 | Shield and sensor |
| CN115910559A (en) * | 2023-03-10 | 2023-04-04 | 国网福建省电力有限公司 | Standard voltage transformer, manufacturing method and combined standard voltage transformer |
-
2009
- 2009-05-31 CN CN200920132572XU patent/CN201497772U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102479609A (en) * | 2010-11-24 | 2012-05-30 | 通用电气公司 | Magnetic shield for current transformer in electronic watt-hour meter |
| CN102479609B (en) * | 2010-11-24 | 2016-12-07 | 通用电气公司 | The magnetic shield of the current transformer in electronics watt-hour meter |
| CN103439547A (en) * | 2013-09-12 | 2013-12-11 | 南京能瑞自动化设备股份有限公司 | Intelligent electric meter relay support assembly capable of eliminating power frequency magnetic field interference |
| CN103439547B (en) * | 2013-09-12 | 2017-07-18 | 南京能瑞自动化设备股份有限公司 | Solve the intelligent electric meter relay bracket component of power frequency magnetic field interference |
| CN106980036A (en) * | 2016-01-16 | 2017-07-25 | 龙妍利 | Total solids holography high-tension current potential sensor |
| WO2018099153A1 (en) * | 2016-11-29 | 2018-06-07 | 杭州海兴电力科技股份有限公司 | Current transformer |
| CN109001503A (en) * | 2017-06-07 | 2018-12-14 | 日置电机株式会社 | Shield and sensor |
| CN115910559A (en) * | 2023-03-10 | 2023-04-04 | 国网福建省电力有限公司 | Standard voltage transformer, manufacturing method and combined standard voltage transformer |
| CN115910559B (en) * | 2023-03-10 | 2023-09-22 | 国网福建省电力有限公司 | Standard voltage transformer, manufacturing method and combined standard voltage transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201497772U (en) | A type current sensor structure for meter measurement | |
| CN201514851U (en) | Outdoor self-excited source three-phase combined electronic transducer metering device | |
| CN102360857B (en) | Integrated network distributing transformer with error compensating mutual inductor | |
| Emanuel et al. | Current harmonics measurement by means of current transformers | |
| CN202258772U (en) | Electronic combined mutual inductor for epoxy casting totally-enclosed strut type centrally-mounted switchgear | |
| CN106053909B (en) | Electric resistance partial pressure type three-phase combination voltage mutual inductor with residual voltage output | |
| CN201302592Y (en) | Electrical energy measuring cabinet | |
| CN201820628U (en) | Electronic current and voltage transformer | |
| CN201319314Y (en) | Current transformer | |
| CN209841950U (en) | Depth fusion current sensor | |
| CN201421466Y (en) | Small high-voltage kilowatt-hour meter directly arranged on 10KV power supply line | |
| CN112271061A (en) | Current transformer for metering | |
| CN203746656U (en) | Three-phase anti-resonance voltage transformer | |
| CN101571553B (en) | Minitype high-voltage electric energy meter directly arranged in 10KV power supply circuit | |
| CN105826000B (en) | A kind of intelligence gas-filling cabinet punching electronic current mutual inductor | |
| CN215218904U (en) | Metering box with extra-wide range combined current transformer | |
| CN203312022U (en) | Low-voltage direct-current-resisting current mutual inductor | |
| CN101930838A (en) | Electronic type voltage transformer | |
| CN205230781U (en) | Three -phase current transformer's magnetism shielding structure based on air core coil | |
| CN215005577U (en) | Distribution network alternating current sensor circuit and current sensor | |
| CN212568917U (en) | Electronic current sensor for electric energy meter | |
| CN107192974B (en) | Integrated voltage and current standard transformer | |
| CN109975591B (en) | AC pincerlike multipurpose meter and coil winding method thereof | |
| CN202142406U (en) | Integrated network distribution transformer having error compensation mutual inductor | |
| CN201319315Y (en) | Current transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20120531 |