CN102931608A - Switch cabinet for single-phase grounding protection of 10kV system - Google Patents
Switch cabinet for single-phase grounding protection of 10kV system Download PDFInfo
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- CN102931608A CN102931608A CN2012104351436A CN201210435143A CN102931608A CN 102931608 A CN102931608 A CN 102931608A CN 2012104351436 A CN2012104351436 A CN 2012104351436A CN 201210435143 A CN201210435143 A CN 201210435143A CN 102931608 A CN102931608 A CN 102931608A
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Abstract
The invention relates to a switch cabinet for single-phase grounding protection of a 10kV system. The switch cabinet comprises a switch cabinet body. A single-phase vacuum permanent breaker, a transformer electric reactor, a current transformer and a signal generator are arranged in the switch cabinet body. The single-phase vacuum permanent breaker is connected with a leading-in terminal of the switch cabinet, a lead-in terminal of the transformer electric reactor is respectively connected with leading-out terminals of the single-phase vacuum permanent breaker and the signal generator, the transformer electric reactor is connected with a grounding cable of the switch cabinet, and the grounding cable is connected with the current transformer. The switch cabinet has functions of integrating arc extinction, overvoltage, electrification, automatic reset and fault location.
Description
Technical field
The present invention relates to single-phase earthing of small current earthing system protection cabinet, particularly relate to a kind of for 10kV system one-phase ground protection switch cubicle.
Background technology
The arc extinction cabinet mode of at present 10kV single-phase earthing of small current earthing system protection equipment employing, but the arc extinction cabinet grounding apparatus of this mode adopts vacuum contactor, and vacuum contactor is low useful life, does not possess the short circuit interruption ability; And behind the enforcement one-phase ground protection, can't differentiate earth fault and whether disappear, can only rely on setting-up time disjunction earthed switch.
Summary of the invention
Low useful life for solving the vacuum contactor that present arc extinction cabinet exists; the problem that can't failure judgement disappears; the invention provides a kind ofly for 10kV system one-phase ground protection switch cubicle, have the function that integrates extinguishing arc, overvoltage, electrification, automatic resetting and fault location.
Purpose of the present invention is achieved through the following technical solutions:
A kind of for 10kV system one-phase ground protection switch cubicle; this switch cubicle comprises switch cabinet; be provided with single-phase vacuum permanent-magnet breaker, transformer type reactor, current transformer and signal generator in the described switch cabinet; described single-phase vacuum permanent-magnet breaker is connected with the end of incoming cables of switch cubicle, is connected leading-out terminal with described single-phase vacuum circuit breaker respectively and is connected in the end of incoming cables of described transformer type reactor with signal generator.
Further, described switch cubicle comprises earth cable, and described transformer type reactor is connected with described earth cable with current transformer.
The invention has the advantages that:
This switch cubicle collection single phase ground fault extinguishing arc, overvoltage protection, ground protection automatic resetting and earth fault are positioned one.This switch cubicle adopts the single-phase vacuum permanent-magnet breaker to realize single phase ground fault extinguishing arc, overvoltage protection, adopts reactance transformer and signal generator to realize single phase ground fault location and automatic resetting.
Description of drawings
Fig. 1: structure principle chart of the present invention.
Embodiment
Be illustrated in figure 1 as a kind of for the structure principle chart of 10kV system one-phase ground protection with switch cubicle; this switch cubicle comprises switch cabinet 1; be provided with the single-phase vacuum permanent-magnet breaker 2 for single phase closing in the described switch cabinet 1; the signal generator 3 that is used for high-frequency signal; the current transformer 5 of system capacitive current when being used for the transformer type reactor 4 of receiving system Injection Signal and being used for the collection single-phase earthing; described single-phase vacuum permanent-magnet breaker 2 is connected with the end of incoming cables 6 of switch cubicle 1; the end of incoming cables of described transformer type reactor 4 is connected with the leading-out terminal that described single-phase vacuum circuit breaker 2 is connected with signal generator respectively; described transformer type reactor 4 is connected with the earth cable 7 of switch cubicle, and this earth cable 7 is connected with described current transformer.
Described switch cabinet adopts KYN28 standard switch cabinet form, cabinet is of a size of 1200*1500*2260, the isolating switch end of incoming cables of switch cubicle is connected with bus, the isolating switch leading-out terminal links to each other with separate single-phase circuit breaker 2 ends of incoming cables separately respectively, single-phase circuit breaker 2 leading-out terminals link together and are connected with 4 ends of incoming cables of transformer type reactor, 4 leading-out terminals of transformer type reactor are connected with earth cable, and earth cable passes from zero sequence current mutual inductor 5, is connected with ground network.Transformer type reactor secondary connection end is connected with the signal generator output, the controller of transformer type reactor secondary connection access switch cubicle.
The isolating switch that closes, device puts into operation, and instruction is controlled corresponding separate single-phase circuit breaker and is closed a floodgate according to single-phase earthing phase-controlled device, enters the one-phase ground protection state.The controller control signal generator produces the particular frequencies signal; by with signal generator secondary connection end with signal injection transformer type reactor; this moment, transformer type reactor primary connection end was by earth cable and ground network and fault point and bus formation closed-loop path; controller gathers the feedback signal of transformer type reactor secondary connection end; judge whether earth fault disappears; while operational failure signal detection apparatus; detect Injection Signal; can realize fault location; after earth fault disappears; control corresponding single-phase circuit breaker separating brake, finish the one-phase ground protection action.
The present invention adopts the single-phase vacuum permanent-magnet breaker as grounding apparatus; adopt the transformer type reactor as current limiter; and utilize signal generator to pass through the transformer type reactor and inject distinctive signal to system, differentiate earth fault and whether disappear, realize the one-phase ground protection automatic resetting.
Should be appreciated that the above detailed description of technical scheme of the present invention being carried out by preferred embodiment is illustrative and not restrictive.Those of ordinary skill in the art is reading on the basis of specification of the present invention and can make amendment to the technical scheme that each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (2)
1. one kind is used for 10kV system one-phase ground protection switch cubicle; this switch cubicle comprises switch cabinet; it is characterized in that: be provided with single-phase vacuum permanent-magnet breaker, transformer type reactor, current transformer and signal generator in the described switch cabinet; described single-phase vacuum permanent-magnet breaker is connected with the end of incoming cables of switch cubicle, is connected leading-out terminal with described single-phase vacuum circuit breaker respectively and is connected in the end of incoming cables of described transformer type reactor with signal generator.
2. according to claim 1 a kind of for 10kV system one-phase ground protection switch cubicle, it is characterized in that: described switch cubicle comprises earth cable, and described transformer type reactor is connected with described earth cable with current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104351436A CN102931608A (en) | 2012-11-05 | 2012-11-05 | Switch cabinet for single-phase grounding protection of 10kV system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104351436A CN102931608A (en) | 2012-11-05 | 2012-11-05 | Switch cabinet for single-phase grounding protection of 10kV system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102931608A true CN102931608A (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104351436A Pending CN102931608A (en) | 2012-11-05 | 2012-11-05 | Switch cabinet for single-phase grounding protection of 10kV system |
Country Status (1)
| Country | Link |
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| CN (1) | CN102931608A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707358A (en) * | 2009-11-10 | 2010-05-12 | 刘亮 | Single-phase grounding comprehensive protecting device of electric network |
| JP2012055135A (en) * | 2010-09-03 | 2012-03-15 | Mitsubishi Materials Corp | Opening and closing device and grounding method of electric circuit |
| CN101719660B (en) * | 2009-12-14 | 2012-07-04 | 张文会 | Method for automatically resetting grounding protection device of small-current system |
| CN202978088U (en) * | 2012-11-05 | 2013-06-05 | 冀北电力有限公司张家口供电公司 | Switch cabinet applied to 10kV system single-phase grounding protection |
-
2012
- 2012-11-05 CN CN2012104351436A patent/CN102931608A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707358A (en) * | 2009-11-10 | 2010-05-12 | 刘亮 | Single-phase grounding comprehensive protecting device of electric network |
| CN101719660B (en) * | 2009-12-14 | 2012-07-04 | 张文会 | Method for automatically resetting grounding protection device of small-current system |
| JP2012055135A (en) * | 2010-09-03 | 2012-03-15 | Mitsubishi Materials Corp | Opening and closing device and grounding method of electric circuit |
| CN202978088U (en) * | 2012-11-05 | 2013-06-05 | 冀北电力有限公司张家口供电公司 | Switch cabinet applied to 10kV system single-phase grounding protection |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130213 |