CN203522176U - Arc extinction device for solving problem of interphase short circuit according to full resistance method - Google Patents
Arc extinction device for solving problem of interphase short circuit according to full resistance method Download PDFInfo
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- CN203522176U CN203522176U CN201320608892.4U CN201320608892U CN203522176U CN 203522176 U CN203522176 U CN 203522176U CN 201320608892 U CN201320608892 U CN 201320608892U CN 203522176 U CN203522176 U CN 203522176U
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Abstract
The utility model discloses an arc extinction device for solving a problem of an interphase short circuit according to a full resistance method. The arc extinction device comprises contact switches K1, K2, and K3, a grounding bar PE1, current transformers CT1, CT2 and CT3, metal resistors R1, R2 and R3, and contact switches K4, K5 and K6. One end of the contact switch K1, one end of the contact switch K2 and one end of the contact switch K3 are connected with the phase A, the phase B and the phase C of a 6-35kV bus respectively, and the other end of the contact switch K1, the other end of the contact switch K2 and the other end of the contact switch K3 form nodes N1, N2 and N3 respectively. The contact switches K4, K5 and K6 are connected between the nodes N1, N2 and N3 and the grounding bar PE1 in series respectively. The metal resistors R1, R2 and R3 are connected to the contact switches K4, K5 and K6 respectively in parallel. The current transformers CT1, CT2 and CT3 are arranged between the contact switches K1, K2, and K3 and the corresponding nodes N1, N2 and N3 respectively in a penetrating mode. The arc extinction device for solving the problem of the interphase short circuit according to the full resistance method has the advantages that the large interphase short circuit current caused by arc light overvoltage peak value switching on and wrong phase judgment can be effectively restrained.
Description
Technical field
The utility model relates to a kind of arc-extinction device, specifically a kind of arc-extinction device that adopts full resistance method to solve phase fault.
Background technology
Single phase ground fault earth current transfer device starts Earth Phase and obtains vacuum contactor when there is single-phase earthing, to vacuum contactor place, makes fault point obtain minimum that electric current reduces the current transfer of fault point, reaches and extinguishes arc light, effectively prevents that fault point from blowing out.During artificial releasing fault, need artificial initiatively involution fault phase obtain vacuum contactor, but existing technology and method, software fault judges mutually can not accomplish that 100% is correct, the high-tension fuse in arc extinction cabinet, just for preventing from sentencing wrong establishing mutually.Once will cause phase fault or switch to close at the arc overvoltage peak period all can to cause high-tension fuse normally to cut-off yet sentence mutually mistake, system will lose extinguishing arc protection, arc grounding likely causes the accident.If high-tension fuse can not cut-off, will cause the serious consequence of two aspects: or arc extinction cabinet blast.Bus service entrance switch tripping operation, causes bus to have a power failure, and as chemical industry etc. requires extra high enterprise to power supply reliability, endangers large all the better.When involution vacuum contactor, can produce switching overvoltage, affect the normal operation of system, the insulation that damages system and the normal equipment moving, increased the risk that system causes the accident because of overvoltage.And the electric charge that system direct-to-ground capacitance stores can only be released by PT, thereby may cause PT resonance and PT, shove and may cause PT to burn while causing PT fuse failure serious.
Utility model content
The technical problems to be solved in the utility model is for overcoming weak point of the prior art, provide a kind of simple in structure, implement to adopt easily full resistance method to solve the arc-extinction device of phase fault, its provide mistake sentence mutually or Closing Switch in the solution of arc light fuse failure during the peak period.
The utility model is achieved in that a kind of arc-extinction device that adopts full resistance method to solve phase fault, and this arc-extinction device comprises contact switch K1～K3, earthing bar PE1, Current Transmit 1～CT3, metallic resistance R1～R3, contact switch K4～K6; One end of three contact switch K1～K3 connects respectively three-phase A, B, the C of 6-35kV bus, and the other end of three contact switch K1～K3 forms respectively node N1～N3; Contact switch K4～the K6 that connects respectively between node N1～N3 and earthing bar PE1, metallic resistance R1～R3 is connected in parallel on respectively on contact switch K4～K6; Between contact switch K1～K3 and corresponding node N1～N3, penetrate Current Transmit 1～CT3.
Employing of the present utility model resistance method entirely solves the arc-extinction device of phase fault, the technical scheme adopting is: the every of 6-35kV bus, by 1 contact switch, connect, contact switch upper end connection bus, in the lower end of switch, connect a high-power metallic resistance and receive ground connection busbar, and on high-power metallic resistance a contact switch in parallel, ABC circuitry phase is identical.Software failure judgement phase A or B or C when system generation arc grounding or metal ground connection, end switch on the bus of the phase arc extinction cabinet of answering according to the fault phase control system control closed pair of judgement, by metallic resistance ground connection, effectively suppress arc overvoltage peak value and close a floodgate and sentence mistake mutually and cause the large electric current of phase fault, be unlikely to cause fuse failure to make the arc extinction cabinet operation that logs off cause larger harm.The electric current of crossing metallic resistance by sample streams by control system sentence the correctness of phase and whether suppressed crest voltage after closure be connected in parallel on ohmically switch, the inhibiting metallic resistance of bypass makes the impedance of arc extinction cabinet minimum, effectively shift on-the-spot fault current to arc extinction cabinet, reach the effect of eliminating fault point arc light over-voltage suppression.When system failure recovery is artificial or during automatic resetting; first open and be connected in parallel on after the ohmically switch of high-power metallic the separately switch of fault phase; during due to minute breakdown switch, seal in powerful metallic resistance and effectively suppressed sub-switching operation overvoltage; thereby the saturation that suppresses PT suppresses the possibility of PT resonance, effectively protects the normal operation of PT.
Accompanying drawing explanation
The employing resistance method entirely that Fig. 1 provides for the utility model better embodiment solves the structural representation of the arc-extinction device of phase fault.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The arc-extinction device that the employing resistance method entirely that referring to Fig. 1 the utility model better embodiment provides solves phase fault comprises contact switch K1～K3, earthing bar PE1, Current Transmit 1～CT3, metallic resistance R1～R3, contact switch K4～K6.
One end of three contact switch K1～K3 connects respectively three-phase A, B, the C of 6-35kV bus, and the other end of three contact switch K1～K3 forms respectively node N1～N3.Contact switch K4～the K6 that connects respectively between node N1～N3 and earthing bar PE1, metallic resistance R1～R3 is connected in parallel on respectively on contact switch K4～K6.Between contact switch K1～K3 and corresponding node N1～N3, penetrate Current Transmit 1～CT3.
As shown in Figure 1, at 6-35kV bus place, by K1, K2, connection bus lower end, K3 upper end, be connected to Node B 1, B2, B3.Access K switch 4 in parallel and high-power metallic resistance R 1, K switch 5 and high-power metallic resistance R 2, K switch 6 and high-power metallic resistance R 3 between Node B 1, B2, B3 and earthing bar PE1, and penetrating between Current Transmit 1, resistance K2 lower end and Node B 2 and penetrating between Current Transmit 2, resistance K3 lower end and Node B 3 and penetrate Current Transmit 3 between resistance K1 lower end and Node B 1.
Software failure judgement phase A or B or C when system generation arc grounding or metal ground connection, bus-tie circuit breaker K1, K2, the K3 of the phase arc extinction cabinet of answering according to the fault phase control system control closed pair of judgement, by metallic resistance R1, R2, R3 ground connection, effectively suppress arc overvoltage peak value and close a floodgate and sentence mistake mutually and cause the large electric current of phase fault, be unlikely to cause fuse failure to make the arc extinction cabinet operation that logs off cause larger harm.The electric current of crossing metallic resistance R1, R2, R3 by CT1, CT2, CT3 sample streams by control system sentence the correctness of phase and whether suppressed crest voltage after closure be connected in parallel on ohmically K switch 4, K5, K6, the inhibiting metallic resistance of bypass makes the impedance of arc extinction cabinet minimum, effectively shift on-the-spot fault current to arc extinction cabinet, reach the effect of eliminating fault point arc light over-voltage suppression.When system failure recovery is artificial or during automatic resetting; first open and be connected in parallel on after the ohmically K switch 4 of high-power metallic, K5, K6 separately K switch 1, K2, the K3 of fault phase; during due to minute breakdown switch, sealed in powerful metallic resistance R1, R2, R3 effectively suppress sub-switching operation overvoltage; thereby the saturation that suppresses PT suppresses the possibility of PT resonance, effectively protects the normal operation of PT.
Arc-extinction device of the present utility model adopts full resistance method to solve phase fault,, comprise contact switch K1, K2, the K3 being connected across between bus and ground and under contact switch K1, K2, K3 switch, between end node N1, N2, N3 and earthing bar, seal in contact switch K4 and high-power metallic resistance R 1, contact switch K5 and high-power metallic resistance R 2, contact switch K6 and the high-power metallic resistance R 3 being connected in parallel.When system generation earth fault, by control system, control contact switch K1, K2, K3 fault phase to inductive switch closure.And before closed phase switch, guarantee that contact switch K4, K5, K6 divide out, by metallic resistance R1, R2, R3, suppress system short-circuit or earth current.When control system, guaranteeing system normal operation is that closing contact K switch 4, K5, K6 metallic resistance R1, R2, R3 make current in the fault point transfer to arc extinction cabinet completely.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (1)
1. adopt full resistance method to solve an arc-extinction device for phase fault, this arc-extinction device comprises contact switch K1～K3, earthing bar PE1; It is characterized in that: this arc-extinction device also comprises Current Transmit 1～CT3, metallic resistance R1～R3, contact switch K4～K6; One end of three contact switch K1～K3 connects respectively three-phase A, B, the C of 6-35kV bus, and the other end of three contact switch K1～K3 forms respectively node N1～N3; Contact switch K4～the K6 that connects respectively between node N1～N3 and earthing bar PE1, metallic resistance R1～R3 is connected in parallel on respectively on contact switch K4～K6; Between contact switch K1～K3 and corresponding node N1～N3, penetrate Current Transmit 1～CT3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320608892.4U CN203522176U (en) | 2013-09-29 | 2013-09-29 | Arc extinction device for solving problem of interphase short circuit according to full resistance method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320608892.4U CN203522176U (en) | 2013-09-29 | 2013-09-29 | Arc extinction device for solving problem of interphase short circuit according to full resistance method |
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| Publication Number | Publication Date |
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| CN203522176U true CN203522176U (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320608892.4U Expired - Lifetime CN203522176U (en) | 2013-09-29 | 2013-09-29 | Arc extinction device for solving problem of interphase short circuit according to full resistance method |
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| CN (1) | CN203522176U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490406A (en) * | 2013-09-29 | 2014-01-01 | 安徽一天电气技术有限公司 | Arc extinction device for solving problem of interphase short circuit according to full resistance method |
| CN106347175A (en) * | 2016-09-28 | 2017-01-25 | 北京易菲盛景科技有限责任公司 | Improved intelligent electrical sectioning device for alternating current electrified railway |
-
2013
- 2013-09-29 CN CN201320608892.4U patent/CN203522176U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490406A (en) * | 2013-09-29 | 2014-01-01 | 安徽一天电气技术有限公司 | Arc extinction device for solving problem of interphase short circuit according to full resistance method |
| CN106347175A (en) * | 2016-09-28 | 2017-01-25 | 北京易菲盛景科技有限责任公司 | Improved intelligent electrical sectioning device for alternating current electrified railway |
| CN106347175B (en) * | 2016-09-28 | 2022-05-31 | 北京易菲盛景科技有限责任公司 | Improved intelligent electric phase splitting device for alternating current electrified railway |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230001 No. 99 Yonghe Road, hi tech Zone, Anhui, Hefei Patentee after: ANHUI ONESKY ELECTRICAL TECHNOLOGY CO.,LTD. Address before: 230001 No. 99 Yonghe Road, hi tech Zone, Anhui, Hefei Patentee before: ANHUI YITIAN ELECTRICAL TECHNOLOGY Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |