CN202978088U - Switch cabinet applied to 10kV system single-phase grounding protection - Google Patents
Switch cabinet applied to 10kV system single-phase grounding protection Download PDFInfo
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- CN202978088U CN202978088U CN 201220576291 CN201220576291U CN202978088U CN 202978088 U CN202978088 U CN 202978088U CN 201220576291 CN201220576291 CN 201220576291 CN 201220576291 U CN201220576291 U CN 201220576291U CN 202978088 U CN202978088 U CN 202978088U
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- type reactor
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- 230000008033 biological extinction Effects 0.000 abstract description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to a switch cabinet applied to 10kV system single-phase grounding protection. The switch cabinet comprises a switch cabinet body. A single-phase vacuum permanent magnetic circuit breaker, a transformer type reactor, a current transformer and a signal generator are arranged in the switch cabinet body. The single-phase vacuum permanent magnetic circuit breaker is connected with a wire inlet end of the switch cabinet. A wire inlet end of the transformer type reactor is respectively connected with wire outlet ends of the single-phase vacuum circuit breaker and the signal generator. The transformer type reactor is connected with a grounding cable of the switch cabinet. The grounding cable is connected with the current transformer. According to the utility model, the switch cabinet applied to 10kV system single-phase grounding protection has the functions of arc extinction, over-voltage, electrification, automatic resetting and fault positioning.
Description
Technical field
The utility model relates to single-phase earthing of small current earthing system protection cabinet, particularly relates to a kind of for 10kV system one-phase ground protection switch cubicle.
Background technology
The arc extinction cabinet mode of 10kV single-phase earthing of small current earthing system protection equipment employing at present, 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 after 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; it is a kind of for 10kV system one-phase ground protection switch cubicle that the utility model provides, and has the function that integrates extinguishing arc, overvoltage, electrification, automatic resetting and fault location.
The purpose of this utility model 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 described switch cabinet; described single-phase vacuum permanent-magnet breaker is connected with the end of incoming cables of switch cubicle, is connected respectively leading-out terminal and is connected in the end of incoming cables of described transformer type reactor with signal generator with described single-phase vacuum circuit breaker.
Further, described switch cubicle comprises earth cable, and described transformer type reactor is connected with described earth cable with current transformer.
The utility model has the advantage of:
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: the utility model structure principle chart.
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 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, 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 is connected 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 transformer type reactor 4 ends of incoming cables, 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, controls corresponding separate single-phase circuit breaker according to the instruction of single-phase earthing phase-controlled device and closes a floodgate, and 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, complete the one-phase ground protection action.
The utility model 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 modify 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 described switch cabinet; described single-phase vacuum permanent-magnet breaker is connected with the end of incoming cables of switch cubicle, is connected respectively leading-out terminal and is connected in the end of incoming cables of described transformer type reactor with signal generator with described single-phase vacuum circuit breaker.
2. according to claim 1 a kind of it is characterized in that: described switch cubicle comprises earth cable for 10kV system one-phase ground protection switch cubicle, and described transformer type reactor is connected with described earth cable with current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576291 CN202978088U (en) | 2012-11-05 | 2012-11-05 | Switch cabinet applied to 10kV system single-phase grounding protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576291 CN202978088U (en) | 2012-11-05 | 2012-11-05 | Switch cabinet applied to 10kV system single-phase grounding protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202978088U true CN202978088U (en) | 2013-06-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220576291 Expired - Lifetime CN202978088U (en) | 2012-11-05 | 2012-11-05 | Switch cabinet applied to 10kV system single-phase grounding protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202978088U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931608A (en) * | 2012-11-05 | 2013-02-13 | 冀北电力有限公司张家口供电公司 | Switch cabinet for single-phase grounding protection of 10kV system |
-
2012
- 2012-11-05 CN CN 201220576291 patent/CN202978088U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931608A (en) * | 2012-11-05 | 2013-02-13 | 冀北电力有限公司张家口供电公司 | Switch cabinet for single-phase grounding protection of 10kV system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
|
| CX01 | Expiry of patent term |