CN204203449U - The error testing system of accurate high-tension current inductor and this mutual inductor - Google Patents
The error testing system of accurate high-tension current inductor and this mutual inductor Download PDFInfo
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- CN204203449U CN204203449U CN201420680016.7U CN201420680016U CN204203449U CN 204203449 U CN204203449 U CN 204203449U CN 201420680016 U CN201420680016 U CN 201420680016U CN 204203449 U CN204203449 U CN 204203449U
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- 238000012360 testing method Methods 0.000 title claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 75
- 238000009413 insulation Methods 0.000 claims abstract description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- WBLJAACUUGHPMU-UHFFFAOYSA-N copper platinum Chemical compound [Cu].[Pt] WBLJAACUUGHPMU-UHFFFAOYSA-N 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 10
- 229920002799 BoPET Polymers 0.000 description 3
- 239000005041 Mylar™ Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000011229 interlayer Substances 0.000 description 1
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Abstract
The error testing system of the accurate high-tension current inductor of the utility model and this mutual inductor discloses a kind of accurate high-tension current inductor, its iron core skin row arranges first insulation course around Multiple coil multitap compensating coil between the multitap compensating coil of Multiple coil and iron core skin; Multiple coil multitap compensating coil skin is wound around the multitap secondary coil of Multiple coil, arranges second insulation course between the multitap compensating coil of Multiple coil and the multitap secondary coil of Multiple coil; The multitap secondary coil of Multiple coil is wound around the multitap primary winding of Multiple coil outward, establishes first screen layer and the 3rd insulation course between the multitap secondary coil of Multiple coil and the multitap primary winding of Multiple coil; The multitap primary winding of Multiple coil is wound around second screen layer outward, arranges the 4th insulation course between the multitap primary winding of Multiple coil and second screen layer; First screen layer and second screen layer all arrange extension line.The utility model can measure the error of high-tension current inductor under actual high-voltage environment directly and accurately.
Description
Technical field
The utility model relates to Electric Energy Metering Technology field, refers to the error testing system of a kind of accurate high-tension current inductor and this mutual inductor particularly.
Background technology
In power system, current transformer is as once primary element is very extensive in practice, and by the big current in a system, change over the small area analysis being suitable for measuring and protecting according to no-load voltage ratio, rated secondary current is generally 5A or 1A.Because generating plant and electrical network (power transmission and transformation system) are kept separate accounts, the accuracy of critical point electric energy metrical is particularly important, current transformer is as one of the important composition of primary equipment, the accuracy of its translation data and rationality are directly connected to the calculating of total errors of electric energy countings, be related to generating plant, electrical network and user economic interests thus accuracy test must be carried out to current transformer.Current transformer is high-tension existence once, wire tension also just embodies the impact of current transformer error thereupon, along with the increase of high-tension current inductor output on market, whether these equipment error under the impact of wire tension meets the requirements, and needs to examine and determine.
At present, high-tension current inductor calibrating in power system is carried out under lower pressure according to JJG 1021-2007 " electric power mutual-inductor " code, although JJG 1021-2007 " electric power mutual-inductor " code provides affect test method for 10kV-35kV current transformer wire tension, but the influence amount of leakage current can only be calculated, directly cannot measure the error of high-tension current inductor under actual high-voltage environment.
Utility model content
The purpose of this utility model is exactly the error testing system that will provide a kind of accurate high-tension current inductor and this mutual inductor, and this mutual inductor directly can measure the error of high-tension current inductor under actual high-voltage environment.
For realizing this object, accurate high-tension current inductor designed by the utility model, comprise iron core, Multiple coil multitap compensation pitch of the laps, the multitap primary winding of Multiple coil, the multitap secondary coil of Multiple coil, insulation course and screen layer, described Multiple coil multitap primary winding tap L
1-L
nrepresent, Multiple coil multitap secondary coil tap K
1-K
mrepresent, Multiple coil multitap compensating coil tap B
1-B
xrepresent.
Described iron core skin row is around the multitap compensating coil of Multiple coil, and arrange first insulation course between the multitap compensating coil of described Multiple coil and iron core skin, first insulation course is mylar;
Described Multiple coil multitap compensating coil skin is wound around the multitap secondary coil of Multiple coil, and arrange second insulation course between the multitap compensating coil of Multiple coil and the multitap secondary coil of Multiple coil, second insulation course is mylar;
The multitap secondary coil of described Multiple coil is wound around the multitap primary winding of Multiple coil outward, first screen layer and the 3rd insulation course is established between the multitap secondary coil of described Multiple coil and the multitap primary winding of Multiple coil, described first screen layer and the multitap secondary coil of Multiple coil are fitted, 3rd insulation course and the multitap primary winding of Multiple coil are fitted, first screen layer and the 3rd insulation course are fitted, and the 3rd insulation course is poured with epoxy resin;
The multitap primary winding of described Multiple coil is wound around second screen layer outward, arranges the 4th insulation course between the multitap primary winding of described Multiple coil and second screen layer, and the 4th insulation course is poured with epoxy resin;
Described first screen layer and second screen layer all arrange extension line, ground connection after the extension line of described first screen layer and any one winding switching of the multitap compensating coil of Multiple coil, the tap L of the multitap primary winding of described Multiple coil
nfor non-polar end, remaining tap of the multitap primary winding of Multiple coil is all as polar end;
The extension line of described second screen layer connects the non-polar end L of the multitap primary winding of Multiple coil
n.
Based on an error testing system for the mutual inductor of above-mentioned accurate high-tension current inductor, it is characterized in that: it comprises pressure regulator T
1, high pressure current lifting device T
2, stepup transformer T
3, voltage transformer (VT) T
4, voltage transformer (VT) T
5, voltage transformer (VT) T
6, pressure regulator T
7, pressure regulator T
8, mutual-inductor tester H
1, mutual-inductor tester H
2, accurate high-tension current inductor T
0, tested high-tension current inductor T
xwith current capacity case Z, wherein, pressure regulator T
1first input end connect the A phase line of three-phase four-wire power, pressure regulator T
1the second input end connect the N phase line of three-phase four-wire power, pressure regulator T
1output terminal connect high pressure current lifting device T
2input end, high pressure current lifting device T
2the first output terminal connect accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil
n, high pressure current lifting device T
2the second output terminal connect tested high-tension current inductor T
xthe non-polar end L of primary winding
2, described accurate high-tension current inductor T
0the polar end L of the multitap primary winding of Multiple coil
n-1with tested high-tension current inductor T
xa polar end L of primary winding
1connect with shielding line, and screen layer extension line on shielding line and accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil
nbe connected, accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil
nwith stepup transformer T
3high-voltage output end connect;
Described tested high-tension current inductor T
xthe polar end K of secondary coil
1with accurate high-tension current inductor T
0the polar end K of the multitap secondary coil of Multiple coil
1after connection again with mutual-inductor tester H
2difference stream loop signal flow into terminal K (terminal K must meet tested high-tension current inductor T
xthe polar end K of secondary coil
1) connect, accurate high-tension current inductor T
0the non-polar end K of the multitap secondary coil of Multiple coil
mconnect mutual-inductor tester H
2connection terminal T
0(the T on tester
0, T
xjust two connection terminals), tested high-tension current inductor T
xthe non-polar end K of secondary coil
2first to be connected in series after current capacity case Z again with mutual-inductor tester H
2connection terminal T
xconnect, accurate high-tension current inductor T
0the polar end of the multitap primary winding of Multiple coil and tested high-tension current inductor T
xthe polar end of primary winding connects with shielding line, and screen layer extension line on shielding line and accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil
nconnect, described mutual-inductor tester H
2difference stream loop signal flow out terminal D and connect mutual-inductor tester H
2earth terminal;
The A of three-phase four-wire power is connected pressure regulator T
7input end, the B of three-phase four-wire power is connected pressure regulator T
8input end, pressure regulator T
7output terminal connect voltage transformer (VT) T
5input end, pressure regulator T
8output terminal connect voltage transformer (VT) T
6input end, voltage transformer (VT) T
5output terminal and voltage transformer (VT) T
6output terminal series connection after connect stepup transformer T
3input end, stepup transformer T
3high-voltage output end connect accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil
n, stepup transformer T
3low-voltage output ground connection;
Described voltage transformer (VT) T
4on high-tension side high-end with stepup transformer T
3the high-end connection of output, voltage transformer (VT) T
4on high-tension side low side ground connection, voltage transformer (VT) T
4low-pressure side connects mutual-inductor tester H
1connection terminal a and x (ax is same loop), accurate high-tension current inductor T
0the non-polar end K of the multitap secondary coil of Multiple coil
mconnect mutual-inductor tester H
1connection terminal K (K, D are the same circuits), tested high-tension current inductor T
xthe non-polar end K of secondary coil
2mutual-inductor tester H is connected by current capacity case Z
1connection terminal D, mutual-inductor tester H
1connection terminal x connect mutual-inductor tester H
1earth terminal.
The beneficial effects of the utility model:
The utility model compared with prior art, because measurement result measures by the method in two mutual schools of high voltage precision current transformer, accuracy can reach 0.05S level, namely ensure that the accuracy of high voltage precision current transformer is more than 0.05S level apply the condition of rated high voltage voltage in primary circuit under, 0.2S level and following electric power mutual-inductor can be tested easily.In addition, the high voltage precision current transformer method of testing that the utility model provides, eliminate due to the high tension voltage error change that cause different from current transformer primary current phase place by phase modulation and phase-locking monitoring device, accurately measure the error of high-tension current inductor under actual high-voltage environment, for ensureing that the accuracy of electric energy metrical provides technical measures.In addition, accurate high-tension current inductor of the present utility model is by increasing poured with epoxy resin at a secondary shield interlayer, accurate high-tension current inductor is made to have high voltage bearing feature, simultaneously, accurate high-tension current inductor of the present utility model is by increasing compensating coil, can compensate leakage current, accuracy can reach the effect of more than 0.05S level.
Accompanying drawing explanation
Fig. 1 is high voltage precision current transformer structure schematic diagram of the present utility model;
Fig. 2 is that the A-A of Fig. 1 is to sectional view;
Fig. 3 is the structural representation of the error testing system of mutual inductor in the utility model;
Fig. 4 is high voltage precision current transformer schematic diagram of the present utility model;
In Fig. 3, PT is voltage transformer (VT), and the secondary current that the secondary voltage that CT is voltage transformer (VT), 100V is PT, 5A are CT, 1-0.01% examines by tester the accuracy range of mutual inductor;
Wherein, the non-polar end L of 1-iron core, the multitap compensating coil of 2-Multiple coil, the multitap primary winding of 3-Multiple coil, the multitap secondary coil of 4-Multiple coil, 5-insulation course, 6-screen layer, the multitap primary winding of 7-Multiple coil
n, the multitap primary winding 3 of 8-Multiple coil polar end L
n-1(in L1-LN-1, any one is all likely polar end).
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Accurate high-tension current inductor as shown in Figures 1 to 3, comprise iron core 1, the multitap compensating coil of Multiple coil 2, the multitap primary winding of Multiple coil 3, the multitap secondary coil 4 of Multiple coil, insulation course 5 and screen layer 6, wherein, described iron core 1 skin row, around the multitap compensating coil 2 of Multiple coil, arranges first insulation course 5 between the multitap compensating coil 2 of described Multiple coil and iron core 1 skin;
Described Multiple coil multitap compensating coil 2 skin is wound around the multitap secondary coil 4 of Multiple coil, arranges second insulation course 5 between the multitap compensating coil of Multiple coil 2 and the multitap secondary coil 4 of Multiple coil;
The multitap secondary coil of described Multiple coil 4 is outer is wound around the multitap primary winding 3 of Multiple coil, first screen layer 6 and the 3rd insulation course 5 is established between the multitap secondary coil of described Multiple coil 4 and the multitap primary winding 3 of Multiple coil, described first screen layer 6 is fitted with the multitap secondary coil 4 of Multiple coil, 3rd insulation course 5 is fitted with the multitap primary winding 3 of Multiple coil, and first screen layer 6 and the 3rd insulation course 5 are fitted;
The multitap primary winding 3 of described Multiple coil is outer is wound around second screen layer 6, arranges the 4th insulation course 5 between the multitap primary winding 3 of described Multiple coil and second screen layer 6;
Described first screen layer 6 and second screen layer 6 all arrange extension line, the extension line of described first screen layer 6 is connected rear ground connection, some tap L of any one winding of the multitap primary winding of described Multiple coil 3 with any one tap of the multitap compensating coil 2 of Multiple coil
nfor non-polar end 7, remaining the primary winding tap of the multitap primary winding 3 of Multiple coil is polar end 8;
The extension line of described second screen layer 6 connects the non-polar end 7 of the multitap primary winding 3 of Multiple coil.
In technique scheme, described screen layer 6 is copper platinum.Insulation course 5 is mylar.
In technique scheme, the number of turn of the multitap compensating coil 2 of Multiple coil is determined the utility model self error effect amount according to wire tension.
Based on an error testing system for the mutual inductor of above-mentioned accurate high-tension current inductor, it is characterized in that: it comprises pressure regulator T
1, high pressure current lifting device T
2, stepup transformer T
3, voltage transformer (VT) T
4, voltage transformer (VT) T
5, voltage transformer (VT) T
6, pressure regulator T
7, pressure regulator T
8, mutual-inductor tester H
1, mutual-inductor tester H
2, accurate high-tension current inductor T
0, tested high-tension current inductor T
xwith current capacity case Z, wherein, pressure regulator T
1first input end connect the A phase line of three-phase four-wire power, pressure regulator T
1the second input end connect the N phase line of three-phase four-wire power, pressure regulator T
1output terminal connect high pressure current lifting device T
2input end, high pressure current lifting device T
2the first output terminal connect accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding 3 of Multiple coil
n7, high pressure current lifting device T
2the second output terminal connect tested high-tension current inductor T
xthe non-polar end L of primary winding
2, described accurate high-tension current inductor T
0the polar end L of the multitap primary winding 3 of Multiple coil
n-18 (i.e. multiple polarity tap, L
1-L
n-1in any one is all likely polar end) with tested high-tension current inductor T
xa polar end L of primary winding
1connect with shielding line, and screen layer extension line on shielding line and accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding 3 of Multiple coil
n7 are connected, high pressure current lifting device T
2output terminal change according to size of current (it is 10A and following current transformer that the terminals as 10A can only survey primary winding electric current, and primary current is greater than 10A and changes the terminals of more than 10A), accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding 3 of Multiple coil
n7 with stepup transformer T
3high-voltage output end connect;
Described tested high-tension current inductor T
xthe polar end K of secondary coil
1with accurate high-tension current inductor T
0the polar end K of the multitap secondary coil 4 of Multiple coil
1after connection again with mutual-inductor tester H
2difference stream loop signal flow into terminal K and connect, accurate high-tension current inductor T
0the non-polar end K of the multitap secondary coil 4 of Multiple coil
m(i.e. multiple nonpolar tap) connects mutual-inductor tester H
2secondary standard connection terminal T
0, tested high-tension current inductor T
xthe non-polar end K of secondary coil
2first to be connected in series after current capacity case Z again with mutual-inductor tester H
2the tested connection terminal T of secondary
xconnect, the choosing value of current capacity case Z is according to tested high-tension current inductor T
xburden requirement choose (according to high-tension current inductor T
xthe rated load that nameplate specifies and lower limited load are arranged), accurate high-tension current inductor T
0the polar end 8 of the multitap primary winding of Multiple coil 3 and tested high-tension current inductor T
xthe polar end of primary winding connects with shielding line, and screen layer extension line on shielding line and accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding 3 of Multiple coil
n7 connect, described mutual-inductor tester H
2difference stream loop signal flow out terminal D and connect mutual-inductor tester H
2earth terminal;
The A of three-phase four-wire power is connected pressure regulator T
7input end, the B of three-phase four-wire power is connected pressure regulator T
8input end, pressure regulator T
7output terminal connect voltage transformer (VT) T
5input end, pressure regulator T
8output terminal connect voltage transformer (VT) T
6input end, voltage transformer (VT) T
5output terminal and voltage transformer (VT) T
6output terminal series connection after connect stepup transformer T
3input end, stepup transformer T
3high-voltage output end connect accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding 3 of Multiple coil
n7 (i.e. L
nterminals are sole access point of high pressure), stepup transformer T
3low-voltage output ground connection; By regulating pressure regulator T
7with pressure regulator T
8output voltage, realize stepup transformer T
3phase place and the size of output voltage are adjustable.Accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding 3 of Multiple coil
n7 by stepup transformer T
3fixedly add high pressure, determine stepup transformer T simultaneously
3to accurate high-tension current inductor T
0the non-polar end L of primary winding
nthe alive phase place of institute and tested high-tension current inductor T
xthe difference of phase place of secondary current controlled, adjustable.
Described voltage transformer (VT) T
4on high-tension side high-end (i.e. one end of a winding) and stepup transformer T
3the high-end connection of output, voltage transformer (VT) T
4on high-tension side low side (and other end of a winding) ground connection, voltage transformer (VT) T
4low-pressure side (i.e. Secondary Winding) connects mutual-inductor tester H
1connection terminal a and x, accurate high-tension current inductor T
0the non-polar end K of the multitap secondary coil 4 of Multiple coil
mconnect mutual-inductor tester H
1connection terminal K, tested high-tension current inductor T
xthe non-polar end K of secondary coil
2mutual-inductor tester H is connected by current capacity case Z
1connection terminal D, mutual-inductor tester H
1connection terminal x connect mutual-inductor tester H
1earth terminal.By mutual-inductor tester H
1dial gauge instruction determine the size of the high tension voltage that transducer check loop primary side applies, by mutual-inductor tester H
1phase differential and the high tension voltage that applies of the relation determination transducer check loop primary side of ratio difference and tested high-tension current inductor T
xthe phase relation of primary current.
In technique scheme, described pressure regulator T
1, high pressure current lifting device T
2, accurate high-tension current inductor T
0, tested high-tension current inductor T
x(regulations stipulate: during inspection mutual inductor, standard current transformer must two class of accuracies higher than tested current transformer) carries out wiring connection according to JJG1021-2007 " electric power mutual-inductor vertification regulation ".
In technique scheme, pressure regulator T
1for 220V pressure regulator, stepup transformer T
3for 50kV stepup transformer, voltage transformer (VT) T
4for the voltage transformer (VT) of 35kV/100V, voltage transformer (VT) T
5with voltage transformer (VT) T
6for 250V/60V voltage transformer (VT).
In technique scheme, boosting and phase modulation apparatus, access the high pressure of adjustable phase place and size in the primary current loop of measurement circuit.For the generation of high pressure, adopt pressure regulator T
7, pressure regulator T
8stepup transformer T is met after exporting series connection
3input end, simultaneously pressure regulator T
7, pressure regulator T
8input end connect A phase, B (or C) phase voltage (the pressure regulator T of three-phase four-wire power respectively
7, pressure regulator T
8input voltage phase difference be 120 degree) regulate the output voltage of two pressure regulators respectively, realize the adjustment of high pressure phase place and size.
In technique scheme, voltage transformer (VT) T
4low-pressure side voltage can determine size and the phase place of high side voltage by voltage ratio conversion.
Based on a transformer error method of testing for above-mentioned transformer error test macro, it comprises the steps:
Step 1: mutual-inductor tester H
2functional mode be set to current transformer test, mutual-inductor tester H
1functional mode be set to voltage transformer (VT) test, regulate pressure regulator T
1boosting, makes mutual-inductor tester H
2percentage tabular value be 1%;
Step 2: repeatedly regulate pressure regulator T
7with pressure regulator T
8output voltage, make mutual-inductor tester H
1percentage tabular value be that default particular value is (according to tested high-tension current inductor T
xrated voltage and voltage transformer (VT) T
4voltage ratio determination dial gauge instruction, as supposed tested high-tension current inductor T
xrated voltage be Un=35kV, voltage transformer (VT) T
4no-load voltage ratio is N=100V/35kV, and tester is set to PT measurement pattern, 100V gear, then, when tester is raised to 100%, export as 100V, reaches tested high-tension current inductor load voltage value 35kV), make mutual-inductor tester H simultaneously
1phase differential reading be 0, at this moment mutual-inductor tester H
2shown error amount is exactly tested high-tension current inductor T under transducer check loop primary side applies rated voltage
xerror when rated current 1%, i.e. tested high-tension current inductor T
xwith accurate high-tension current inductor T
0error relatively;
Step 3: regulate pressure regulator T
1boosting, makes mutual-inductor tester H
2percentage tabular value rise to 5%; Repeat step 2, record mutual-inductor tester H
2error amount;
Step 4: according to the phase modulation method shown in step 1 ~ step 3 by mutual-inductor tester H
2record the tested high-tension current inductor T under any percentage of percentage tabular value in 1% ~ 120%
xerror amount, the high tension voltage that simultaneously can apply at transducer check loop primary side and tested high-tension current inductor T
xwhen the phase place of primary current is consistent, measure tested high-tension current inductor T
xerror amount.
In technique scheme, during calibrating current transformer, high voltage precision current transformer T
0with tested high-tension current inductor T
xeR effect is than necessary identical; Mutual-inductor tester H
1functional mode be set to voltage transformer (VT) test pattern, mutual-inductor tester H
2functional mode be set to current transformer test pattern.Mutual-inductor tester H
2when testing certain any current transformer error, when rising rated high voltage, mutual-inductor tester H
1if not on reading zero, then by regulating pressure regulator T
7, pressure regulator T
8(namely regulating the A phase of three-phase four-wire power and the voltage of B phase) makes mutual-inductor tester H
1on reading be zero, thus reach high tension voltage and tested high-tension current inductor T that primary side of the present utility model is applied
xthe phase place of primary current is consistent.
In technique scheme, based on above-mentioned measuring circuit measure come be exactly tested high-tension current inductor T
xwith accurate high-tension current inductor T
0between difference stream, reacted tested high-tension current inductor T
xerror.
The content that this instructions is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (3)
1. an accurate high-tension current inductor, comprise iron core (1), the multitap compensating coil of Multiple coil (2), the multitap primary winding of Multiple coil (3), the multitap secondary coil of Multiple coil (4), insulation course (5) and screen layer (6), wherein, described iron core (1) skin row twines the multitap compensating coil of Multiple coil (2), arranges first insulation course (5) between the multitap compensating coil of described Multiple coil (2) and iron core (1) skin;
The multitap compensating coil of described Multiple coil (2) skin is wound around the multitap secondary coil of Multiple coil (4), arranges second insulation course (5) between the multitap compensating coil of Multiple coil (2) and the multitap secondary coil of Multiple coil (4);
The multitap secondary coil of described Multiple coil (4) is wound around the multitap primary winding of Multiple coil (3) outward, first screen layer (6) and the 3rd insulation course (5) is established between the multitap secondary coil of described Multiple coil (4) and the multitap primary winding of Multiple coil (3), described first screen layer (6) and the multitap secondary coil of Multiple coil (4) are fitted, 3rd insulation course (5) is fitted with the multitap primary winding of Multiple coil (3), and first screen layer (6) is fitted with the 3rd insulation course (5);
The multitap primary winding of described Multiple coil (3) is wound around second screen layer (6) outward, arranges the 4th insulation course (5) between the multitap primary winding of described Multiple coil (3) and second screen layer (6);
Described first screen layer (6) and second screen layer (6) all arrange extension line, ground connection after the extension line of described first screen layer (6) and any one winding switching of the multitap compensating coil of Multiple coil (2), the tap L of the multitap primary winding of described Multiple coil (3)
nfor non-polar end (7), the multitap primary winding of Multiple coil (3) remaining tap is all as polar end (8);
The extension line of described second screen layer (6) connects the non-polar end (7) of the multitap primary winding of Multiple coil (3).
2. accurate high-tension current inductor according to claim 1, is characterized in that: described screen layer (6) is copper platinum.
3. based on an error testing system for the mutual inductor of high-tension current inductor accurate described in claim 1, it is characterized in that: it comprises pressure regulator T
1, high pressure current lifting device T
2, stepup transformer T
3, voltage transformer (VT) T
4, voltage transformer (VT) T
5, voltage transformer (VT) T
6, pressure regulator T
7, pressure regulator T
8, mutual-inductor tester H
1, mutual-inductor tester H
2, accurate high-tension current inductor T
0, tested high-tension current inductor T
xwith current capacity case Z, wherein, pressure regulator T
1first input end connect the A phase line of three-phase four-wire power, pressure regulator T
1the second input end connect the N phase line of three-phase four-wire power, pressure regulator T
1output terminal connect high pressure current lifting device T
2input end, high pressure current lifting device T
2the first output terminal connect accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil (3)
n(7), high pressure current lifting device T
2the second output terminal connect tested high-tension current inductor T
xthe non-polar end L of primary winding
2, described accurate high-tension current inductor T
0the polar end L of the multitap primary winding of Multiple coil (3)
n-1(8) with tested high-tension current inductor T
xa polar end L of primary winding
1connect with shielding line, and screen layer extension line on shielding line and accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil (3)
n(7) be connected, accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil (3)
n(7) with stepup transformer T
3high-voltage output end connect;
Described tested high-tension current inductor T
xthe polar end K of secondary coil
1with accurate high-tension current inductor T
0the polar end K of the multitap secondary coil of Multiple coil (4)
1after connection again with mutual-inductor tester H
2difference stream tributary signal flow into terminal K and connect, accurate high-tension current inductor T
0the non-polar end K of the multitap secondary coil of Multiple coil (4)
mconnect mutual-inductor tester H
2secondary standard connection terminal T
0, tested high-tension current inductor T
xthe non-polar end K of secondary coil
2first to be connected in series after current capacity case Z again with mutual-inductor tester H
2the tested connection terminal TX1 of secondary connect, accurate high-tension current inductor T
0polar end (8) and the tested high-tension current inductor T of the multitap primary winding of Multiple coil (3)
xthe polar end connecting line of primary winding is shielding line, and screen layer extension line on shielding line and accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil (3)
nconnect, described mutual-inductor tester H
2difference stream tributary signal flow out terminal D and connect mutual-inductor tester H
2earth terminal;
The A of three-phase four-wire power is connected pressure regulator T
7input end, the B of three-phase four-wire power is connected pressure regulator T
8input end, pressure regulator T
7output terminal connect voltage transformer (VT) T
5input end, pressure regulator T
8output terminal connect voltage transformer (VT) T
6input end, voltage transformer (VT) T
5output terminal and voltage transformer (VT) T
6output terminal series connection after connect stepup transformer T
3input end, stepup transformer T
3high-voltage output end connect accurate high-tension current inductor T
0the non-polar end L of the multitap primary winding of Multiple coil (3)
n(7), stepup transformer T
3low-voltage output ground connection;
Described voltage transformer (VT) T
4on high-tension side high-end with stepup transformer T
3the high-end connection of output, voltage transformer (VT) T
4on high-tension side low side ground connection, voltage transformer (VT) T
4low-pressure side connects mutual-inductor tester H
1connection terminal a and x, accurate high-tension current inductor T
0the non-polar end K of the multitap secondary coil of Multiple coil (4)
mconnect mutual-inductor tester H
1connection terminal K, tested high-tension current inductor T
xthe non-polar end K of secondary coil
2mutual-inductor tester H is connected by current capacity case Z
1connection terminal D, mutual-inductor tester H
1connection terminal x connect mutual-inductor tester H
1earth terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420680016.7U CN204203449U (en) | 2014-11-10 | 2014-11-10 | The error testing system of accurate high-tension current inductor and this mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420680016.7U CN204203449U (en) | 2014-11-10 | 2014-11-10 | The error testing system of accurate high-tension current inductor and this mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204203449U true CN204203449U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420680016.7U Withdrawn - After Issue CN204203449U (en) | 2014-11-10 | 2014-11-10 | The error testing system of accurate high-tension current inductor and this mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204203449U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330760A (en) * | 2014-11-10 | 2015-02-04 | 国家电网公司 | Precise high-voltage current mutual inductor and error testing system and method thereof |
| CN109814060A (en) * | 2019-01-03 | 2019-05-28 | 广西电网有限责任公司贵港供电局 | The verification system and its method of more high-tension current inductors |
-
2014
- 2014-11-10 CN CN201420680016.7U patent/CN204203449U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330760A (en) * | 2014-11-10 | 2015-02-04 | 国家电网公司 | Precise high-voltage current mutual inductor and error testing system and method thereof |
| CN104330760B (en) * | 2014-11-10 | 2016-09-14 | 国家电网公司 | High-tension current inductor and the error testing system and method for this transformer |
| CN109814060A (en) * | 2019-01-03 | 2019-05-28 | 广西电网有限责任公司贵港供电局 | The verification system and its method of more high-tension current inductors |
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