CN101924346A - Current and zero-sequence difunctional mutual inductor - Google Patents
Current and zero-sequence difunctional mutual inductor Download PDFInfo
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- CN101924346A CN101924346A CN 201010279880 CN201010279880A CN101924346A CN 101924346 A CN101924346 A CN 101924346A CN 201010279880 CN201010279880 CN 201010279880 CN 201010279880 A CN201010279880 A CN 201010279880A CN 101924346 A CN101924346 A CN 101924346A
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Abstract
The invention discloses a current and zero-sequence difunctional mutual inductor, and relates to a circuit breaker and a line with integrated power supply control and protection, the overcurrent, the grounding, the leakage protection of a motor, and the like. The invention is characterized in that three identical current mutual inductors are combined, a zero-sequence current mutual inductor in which the original three main circuit wires perforate in a hole is omitted and a current and zero-sequence difunctional mutual inductor is provided, and the invention has the characteristics of high precision, small volume, low cost, simple structure and convenient installation, and solves the problem of difficult routing as a result of compact structure for power supply and control protection.
Description
Technical field:
The overcurrent of the present invention relates to power supply, control automatically, particularly integral circuit breaker, power supply line protector, motor and other power protector being protected in control, ground connection, earth leakage protective etc.
Technical background:
Power consumption in the past; electrical equipment such as control protection integral circuit breaker; motor protector; the zero sequence current mutual inductor that in power capacitor protector and other power protector earth-leakage protection is used mostly is a hole core-theaded type; single-phase or two-phase or three-phase all are that two or three major loop electric wires penetrate in the hole; when electric leakage or ground connection appear in load; when penetrating in the hole electric current disequilibrium on two or the three major loop electric wires and no longer equating; the current signal of zero sequence current mutual inductor secondary winding leaks electricity or the earth current signal exactly; zero sequence current mutual inductor requires very high to the silicon steel sheet material; even adopt not alloy of higher-priced pool; however existing zero sequence current mutual inductor does not still reach effect preferably for the electric leakage and the ground protection of big electric current power consumption equipment; and be difficult to cabling to controlling in electrical equipment such as protecting integral circuit breaker and the motor protector; cause complex structure; volume is big; cost height, the directly economic and technical norms and the reliability of similar products such as influence control protection integral circuit breaker and motor protector.
Summary of the invention:
The objective of the invention is to invent a kind of electric current and zero-sequence difunctional mutual inductor at above-mentioned many defectives; only need with two or three or many identical current transformer combinations; can increase the zero sequence current mutual inductor function; can save former zero sequence current mutual inductor; the main circuit electric wire of single-phase or two-phase or three-phase is no longer through in the hole; precision height not only; volume is little; cost is low; and it is simple in structure; easy for installation; solved power consumption, particularly control protection integral circuit breaker; the power supply line protector; the overcurrent of motor and other power protector; ground connection; structure is tightly beaten a great problem that causes the cabling difficulty in the earth leakage protective.
Technical scheme of the present invention: electric current and zero-sequence difunctional mutual inductor comprise three-phase current and zero-sequence difunctional mutual inductor or two-phase current and zero-sequence difunctional mutual inductor, it is characterized in that three-phase current and zero-sequence difunctional mutual inductor be saved major loop A mutually with major loop B mutually and three leads of major loop C phase penetrate conventional zero-sequence transformer in the same hole, combine by three identical current transformer LA summation current transformer LB summation current transformer LC, major loop A phase conductor penetrates current transformer LA, major loop B phase conductor penetrates current transformer LB, major loop C phase conductor penetrates current transformer LC, current transformer LA secondary winding LTA tail lead-out wire Ta is zero sequence signal output VL1 with current transformer LB secondary winding LTB tail lead-out wire Tb with the three-way johning knot of current transformer LC secondary winding LTC tail lead-out wire Tc, LTA lead-out wire TA of current transformer LA secondary winding connects a current signal resistance R A, LTB lead-out wire TB of current transformer LB secondary winding connects a current signal resistance R B, LTC lead-out wire TC of current transformer LC secondary winding connects a current signal resistance R C, current signal resistance R A equates with resistance and the power of current signal resistance R C with current signal resistance R B, the common port V that the other end of current signal resistance R A is three-phase current and zero-sequence difunctional mutual inductor with the three-way binding of the other end of the other end of current signal resistance R B and current signal resistance R C
0, zero sequence signal output VL1 and common port V
0Between connect a zero sequence signal resistance R
0LTA lead-out wire TA of current transformer LA secondary winding is A phase current IA current signal output end VIA, LTB lead-out wire TB of current transformer LB secondary winding is B phase current IB current signal output end VIB, and LTC lead-out wire TC of current transformer LC secondary winding is C phase current IC current signal output end VIC.
Said electric current and zero-sequence difunctional mutual inductor, it is characterized in that two-phase current and zero-sequence difunctional mutual inductor be saved major loop A mutually with major loop B mutually two leads penetrate conventional zero-sequence transformer in the same hole, by two identical current transformer LA summation current transformer LB combinations, major loop A phase conductor penetrates current transformer LA, major loop B phase conductor penetrates current transformer LB, the secondary winding LTB tail lead-out wire Tb of current transformer LA secondary winding LTA tail lead-out wire Ta and current transformer LB connects and is zero sequence signal output VL1, LTA lead-out wire TA of current transformer LA secondary winding connects a current signal resistance R A, LTB lead-out wire TB of current transformer LB secondary winding connects a current signal resistance R B, current signal resistance R A is identical with current signal resistance R B resistance and power, and the other end of current signal resistance R A and the other end of current signal resistance R B connect the common port V into two-phase current and zero-sequence difunctional mutual inductor
0, zero sequence signal output VL2 and common port V
0Between connect a zero sequence signal resistance R
0LTA lead-out wire TA of current transformer LA secondary winding is the current signal output end VIA of A phase current IA, LTB lead-out wire TB of current transformer LB secondary winding is the current signal output end VIB of B phase current IB, and the optional one of current signal output end VIA or current signal output end VIB is a current output signal.
Description of drawings:
Fig. 1, three-phase zero sequence and electric current difunctional mutual inductor circuit structure line schematic diagram.
Fig. 2, two-phase zero sequence and electric current difunctional mutual inductor circuit structure line schematic diagram.
Among the figure: A phase, B phase, C phase, IA A phase current, IB B phase current, IC C phase current, LA current transformer, LB current transformer, LC current transformer, LTA secondary winding, LTB secondary winding, LTC secondary winding, a TA lead-out wire, a TB lead-out wire, a TC lead-out wire, Ta tail lead-out wire, Tb tail lead-out wire, Tc tail lead-out wire, RA current signal resistance, RB current signal resistance, RC current signal resistance, R
0Zero sequence signal resistance, RZ major loop load (motor), V
0Common port, VL1 zero sequence (electric leakage ground connection) signal output part, VL2 zero sequence (electric leakage ground connection) signal output part, VIA current signal output end, VIB current signal output end, VIC current signal output end.
Embodiment:
Three-phase current among Fig. 1 is to have saved major loop (A) mutually with the zero-sequence difunctional combination transformer; major loop (B) phase; three leads of major loop (C) phase penetrate the conventional zero-sequence transformer in the same hole; close by three identical current transformers (LA) summation current transformers (LB) summation current transformers (LC) combination; major loop (A) phase conductor penetrates current transformer (LA); major loop (B) phase conductor penetrates current transformer (LB); major loop (C) phase conductor penetrates current transformer (LC); each current transformer (LA) or all be common current transformer (LB) or (LC) wherein; ground protection connects by the figure circuit if only be used for leaking electricity; (VIA); (VIB); (VIC) current signal output end need not get final product; (VL1) zero sequence (electric leakage ground connection) signal output is carried out processing and amplifying more according to actual needs and is gone control actuating component can reach the purpose of protection equipment, do not need instrument transformer is changed.If keep the original function of current transformer, only need that (VIA), (VIB), (VIC) current signal output end are carried out processing and amplifying respectively and go control actuating component to get final product.Instrument transformer tail lead-out wire (Ta) is zero sequence signal output (VL1) with instrument transformer tail lead-out wire (Tb) with the three-way johning knot of instrument transformer tail lead-out wire (Tc), instrument transformer head lead-out wire (TA) connects a current signal resistance (RA), instrument transformer head lead-out wire (TB) connects a current signal resistance (RB), instrument transformer head lead-out wire (TC) connects a current signal resistance (RC), current signal resistance (RA) equates with the resistance and the power of current signal resistance (RB) with current signal resistance (RC), the common port (Vo) that the other end of current signal resistance (RA) is three-phase current and zero-sequence difunctional combination transformer with the three-way binding of the other end of the other end of current signal resistance (RB) and current signal resistance (RC), connect a zero sequence signal resistance (Ro) between zero sequence signal output (VL1) and the common port (Vo), instrument transformer head lead-out wire (TA) is (A) phase current (IA) current signal output end (VIA), instrument transformer head lead-out wire (TB) is (B) phase current (IB) current signal output end (VIB), and instrument transformer head lead-out wire (TC) is (C) phase current (IC) current signal output end (VIC).
Two-phase zero sequence among Fig. 2 and the difunctional combination transformer of electric current be saved major loop A mutually with major loop B mutually two leads penetrate conventional zero-sequence transformer in the same hole, by the identical current transformer combination of two parameters of current transformer (LA) summation current transformer (LB), major loop (A) phase conductor penetrates current transformer (LA), major loop (B) phase conductor penetrates current transformer (LB), instrument transformer tail lead-out wire (Ta) connects with instrument transformer tail lead-out wire (Tb) and is zero sequence signal output (VL2), current transformer head lead-out wire (TA) connects a current signal resistance (RA), current transformer head lead-out wire (TB) connects a current signal resistance (RB), current signal resistance (RA) is identical with current signal resistance (RB) resistance and power, the other end of the other end of current signal resistance (RA) and current signal resistance (RB) connects the common port (Vo) into two-phase current and zero-sequence difunctional combination transformer, connect a zero sequence signal resistance (Ro) between zero sequence signal output (VL2) and the common port (Vo), instrument transformer head lead-out wire (TA) is the current signal output end (VA1) of (A) phase current (IA), instrument transformer head lead-out wire (TB) is the current signal output end (VB1) of (B) phase current (IB), and the optional one of current signal output end (VA1) or current signal output end (VB1) is a current output signal.
Claims (2)
1. electric current and zero-sequence difunctional mutual inductor comprise three-phase current and zero-sequence difunctional mutual inductor or two-phase current and zero-sequence difunctional mutual inductor, it is characterized in that three-phase current and zero-sequence difunctional mutual inductor be saved major loop (A) mutually and major loop (B) mutually and three leads of major loop (C) phase penetrate conventional zero-sequence transformer in the same hole, combine by three identical current transformers (LA) summation current transformers (LB) summation current transformers (LC), major loop (A) phase conductor penetrates current transformer (LA), major loop (B) phase conductor penetrates current transformer (LB), major loop (C) phase conductor penetrates current transformer (LC), current transformer (LA) secondary winding (LTA) tail lead-out wire (Ta) is zero sequence signal output (VL1) with current transformer (LB) secondary winding (LTB) tail lead-out wire (Tb) with the three-way johning knot of current transformer (LC) secondary winding (LTC) tail lead-out wire (Tc), current transformer (LA) secondary winding (LTA) lead-out wire (TA) connects a current signal resistance (RA), current transformer (LB) secondary winding (LTB) lead-out wire (TB) connects a current signal resistance (RB), current transformer (LC) secondary winding (LTC) lead-out wire (TC) connects a current signal resistance (RC), current signal resistance (RA) equates with the resistance and the power of current signal resistance (RB) with current signal resistance (RC), the common port (V that the other end of current signal resistance (RA) is three-phase current and zero-sequence difunctional mutual inductor with the three-way binding of the other end of the other end of current signal resistance (RB) and current signal resistance (RC)
0), zero sequence signal output (VL1) and common port (V
0) between connect a zero sequence signal resistance (R
0), current transformer (LA) secondary winding (LTA) lead-out wire (TA) is (A) phase current (IA) current signal output end (VIA), current transformer (LB) secondary winding (LTB) lead-out wire (TB) is (B) phase current (IB) current signal output end (VIB), and current transformer (LC) secondary winding (LTC) lead-out wire (TC) is (C) phase current (IC) current signal output end (VIC).
2. according to said electric current of claim 1 and zero-sequence difunctional mutual inductor, it is characterized in that two-phase current and zero-sequence difunctional mutual inductor be saved major loop (A) mutually and major loop (B) mutually two leads penetrate conventional zero-sequence transformer in the same hole, make up by two identical current transformers (LA) summation current transformers (LB), major loop (A) phase conductor penetrates current transformer (LA), major loop (B) phase conductor penetrates current transformer (LB), secondary winding (LTB) the tail lead-out wire (Tb) of current transformer (LA) secondary winding (LTA) tail lead-out wire (Ta) and current transformer (LB) connects and is zero sequence signal output (VL1), current transformer (LA) secondary winding (LTA) lead-out wire (TA) connects a current signal resistance (RA), current transformer (LB) secondary winding (LTB) lead-out wire (TB) connects a current signal resistance (RB), current signal resistance (RA) is identical with current signal resistance (RB) resistance and power, and the other end of the other end of current signal resistance (RA) and current signal resistance (RB) connects the common port (V into two-phase current and zero-sequence difunctional mutual inductor
0), zero sequence signal output (VL2) and common port (V
0) between connect a zero sequence signal resistance (R
0), current transformer (LA) secondary winding (LTA) lead-out wire (TA) is the current signal output end (VIA) of (A) phase current (IA), current transformer (LB) secondary winding (LTB) lead-out wire (TB) is the current signal output end (VIB) of (B) phase current (IB), and the optional one of current signal output end (VIA) or current signal output end (VIB) is a current output signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010279880 CN101924346A (en) | 2010-09-01 | 2010-09-01 | Current and zero-sequence difunctional mutual inductor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010279880 CN101924346A (en) | 2010-09-01 | 2010-09-01 | Current and zero-sequence difunctional mutual inductor |
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| CN101924346A true CN101924346A (en) | 2010-12-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609283A (en) * | 2016-01-15 | 2016-05-25 | 胡妍 | Three-phase zero sequence current transformer |
| CN110648835A (en) * | 2019-09-12 | 2020-01-03 | 湖北大二互科技股份有限公司 | Three-phase current synthesis type zero sequence transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100112A (en) * | 1986-01-10 | 1987-08-05 | 默林·格伦 | The power circuit breaker solid-state trip device of girdle tests circuit |
| JP2002186165A (en) * | 2000-12-11 | 2002-06-28 | Nissin Electric Co Ltd | Differential current relay |
| CN2793890Y (en) * | 2005-04-25 | 2006-07-05 | 上海大屯能源股份有限公司 | Integrated mutual inductor of explosive-proof electromagnetic starter |
| CN202093973U (en) * | 2010-09-01 | 2011-12-28 | 介国安 | Current and zero sequence dual-function transformer |
-
2010
- 2010-09-01 CN CN 201010279880 patent/CN101924346A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100112A (en) * | 1986-01-10 | 1987-08-05 | 默林·格伦 | The power circuit breaker solid-state trip device of girdle tests circuit |
| JP2002186165A (en) * | 2000-12-11 | 2002-06-28 | Nissin Electric Co Ltd | Differential current relay |
| CN2793890Y (en) * | 2005-04-25 | 2006-07-05 | 上海大屯能源股份有限公司 | Integrated mutual inductor of explosive-proof electromagnetic starter |
| CN202093973U (en) * | 2010-09-01 | 2011-12-28 | 介国安 | Current and zero sequence dual-function transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609283A (en) * | 2016-01-15 | 2016-05-25 | 胡妍 | Three-phase zero sequence current transformer |
| CN110648835A (en) * | 2019-09-12 | 2020-01-03 | 湖北大二互科技股份有限公司 | Three-phase current synthesis type zero sequence transformer |
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| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 325207 Zhejiang province Ruian City Feiyun Town Yun Zhou Industrial Zone Thai Electric Appliance Co. Ltd Applicant after: Jie Guoan Address before: 325400 Zhejiang County of Pingyang Province town of Kunyang liberation Street No. 114 Applicant before: Jie Guoan |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101222 |
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