CN202975229U - Multipoint earthing detection locator for secondary circuits of transformer substations - Google Patents
Multipoint earthing detection locator for secondary circuits of transformer substations Download PDFInfo
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- CN202975229U CN202975229U CN 201220693727 CN201220693727U CN202975229U CN 202975229 U CN202975229 U CN 202975229U CN 201220693727 CN201220693727 CN 201220693727 CN 201220693727 U CN201220693727 U CN 201220693727U CN 202975229 U CN202975229 U CN 202975229U
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
A multipoint earthing detection locator for secondary circuits of transformer substations comprises a multipoint earthing detection locator body (1), current detection pliers (2) and signal generation pliers (4). The signal generation pliers (4) are clamped onthesecondary circuit and generates high-frequency current on the earthed circuits if a secondary circuit is in multipoint earthing, a current sensing coil (8) on the current detection pliers can sense current, a signal detecting and displaying module (13) connected with the coil can detect the high-frequency current and locate the earthed points by continuously detecting along branches of the high-frequency current, detection can be realized without opening any circuits, running of a secondary system is unaffected, location is convenient and fast, manufacturing process is simple and production cost is low.
Description
Technical field
The utility model relates to a kind of detecting instrument of searching the Substation secondary circuit earth point.
Background technology
The voltage transformer (VT) summation current transformer secondary circuit of transformer station requires one point earth, as multipoint earthing occurs, may cause voltage, current measurement to go wrong, and can make protective device tripping or malfunction occur.But the equipment that voltage transformer (VT) summation current transformer secondary circuit connects is many, the loop is wide, and when normally moving, earth point does not allow to open.How detecting under the condition that existing earth point is not opened, search other earth points, is field maintemance personnel's a difficult problem.
The utility model content
The purpose of this utility model is to overcome the problems referred to above, provides a kind of Substation secondary circuit multipoint earthing to detect and searches instrument, under the condition that does not affect operation, second loop grounding point in transformer station is detected.
For achieving the above object, the technical solution adopted in the utility model is:
the Substation secondary circuit multipoint earthing detects searches instrument, detected by multipoint earthing and search instrument main body (1), current detecting pincers (2), signal clamps (4) and consists of, it is characterized in that: multipoint earthing detects and searches instrument main body (1) by signal generating module (12), input and display module (13) consist of, signal clamps on the iron core of (4) and is wound with signal generation coil (9), signal generation coil (9) is connected with signal generating module (12) by soft line one (10), be wound with current-sense coil (8) on the iron core of current detecting pincers (2), current-sense coil (8) is connected with input and display module (13) by soft line two (11).
during use, signal is clamped (4) pincers on secondary circuit (5), signal generating module (12) produces high-frequency alternating current, clamp at signal by coil (9) on the iron core of (4) and produce high frequency magnetic field, if secondary circuit has multipoint earthing on (5), will produce high-frequency current on the loop that is formed by two earth points, current-sense coil (8) on current detecting pincers (2) just can induce electric current, the input of connecting coil (8) and display module (13) just can be measured high-frequency current, constantly detect along the branch road that high-frequency current is arranged and just can find unnecessary earth point.
The utility model compared with prior art has the following advantages:
(1) use clamp type structure, at the Substation secondary circuit run duration, need not open any loop and just can detect the existence of second earth point.
(2) in testing process on the operation of electrical secondary system without any impact.
(3) manufacture craft is simple, production cost is low, be convenient to promote the use of.
Below by drawings and Examples, the utility model is described in further detail.
Description of drawings
Accompanying drawing 1 searches for the Substation secondary circuit multipoint earthing detects the schematic diagram that instrument uses on secondary circuit.
Accompanying drawing 2 detects the schematic diagram of searching instrument for the Substation secondary circuit multipoint earthing.
The icon explanation:
1～multipoint earthing detects searches the instrument main body; 2～current detecting pincers; 3～loop current; 4～signal clamps; 5～secondary circuit; 6～normal earth point; 7～unnecessary earth point; 8～current-sense coil; 9～signal generation coil; 10～soft line one; 11～soft line two; 12～signal generating module; 13～input and display module.
Embodiment
accompanying drawing 1 searches for the Substation secondary circuit multipoint earthing detects the schematic diagram that instrument uses on secondary circuit, accompanying drawing 2 detects the schematic diagram of searching instrument for the Substation secondary circuit multipoint earthing, the Substation secondary circuit multipoint earthing detects searches instrument, detected by multipoint earthing and search instrument main body (1), current detecting pincers (2), signal clamps (4) and consists of, multipoint earthing detects the signal generating module (12) of searching on instrument main body (1) can send the high-frequency ac electric signal, clamp at signal by coil (9) on the iron core of (4) and produce high frequency magnetic field, if unnecessary earth point (7) is arranged on secondary circuit (5), consist of the closed-loop path by normal earth point (6), will produce high-frequency current (3) on the loop, current-sense coil (8) on current detecting pincers (2) just can induce electric current, the input of connecting coil (8) and display module (13) are by filtering, coupling just can be measured the high-frequency current that signal projector sends, constantly detect along the branch road that high-frequency current is arranged and just can find earth point.As there not being the fault ground point, because not consisting of the loop, will can not induce high-frequency current, to have, can judge whether to exist the fault ground point without high-frequency current.The utility model can detect under the condition that does not change operation wiring and search, in testing process on the operation of electrical secondary system without any impact, search easy, quick.
Claims (1)
1. the Substation secondary circuit multipoint earthing detects and searches instrument, detected by multipoint earthing and search instrument main body (1), current detecting pincers (2), signal clamps (4) and consists of, it is characterized in that: multipoint earthing detects and searches instrument main body (1) by signal generating module (12), input and display module (13) consist of, signal clamps on the iron core of (4) and is wound with signal generation coil (9), signal generation coil (9) is connected with signal generating module (12) by soft line one (10), be wound with current-sense coil (8) on the iron core of current detecting pincers (2), current-sense coil (8) is connected with input and display module (13) by soft line two (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220693727 CN202975229U (en) | 2012-12-17 | 2012-12-17 | Multipoint earthing detection locator for secondary circuits of transformer substations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220693727 CN202975229U (en) | 2012-12-17 | 2012-12-17 | Multipoint earthing detection locator for secondary circuits of transformer substations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202975229U true CN202975229U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220693727 Expired - Lifetime CN202975229U (en) | 2012-12-17 | 2012-12-17 | Multipoint earthing detection locator for secondary circuits of transformer substations |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202975229U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487713A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit |
| CN103605041A (en) * | 2013-11-14 | 2014-02-26 | 国家电网公司 | Non-contact multi-point grounding detection method and system for secondary circuit of current transformer |
| CN103728483A (en) * | 2013-12-31 | 2014-04-16 | 广东电网公司阳江供电局 | Device and method for detecting current generation of secondary circuit due to disconnecting switch operation |
| CN104198877A (en) * | 2014-09-26 | 2014-12-10 | 国家电网公司 | Portable multipoint grounding detector |
| CN106646119A (en) * | 2016-11-24 | 2017-05-10 | 国网山东省电力公司成武县供电公司 | Ground fault search instrument, and ground fault point search method and system |
| CN109596934A (en) * | 2018-11-30 | 2019-04-09 | 广州格兴全电力科技有限公司 | A kind of double split-core type meter mensurations of secondary circuit multipoint earthing |
| CN112557951A (en) * | 2020-12-10 | 2021-03-26 | 中国科学院合肥物质科学研究院 | On-line monitoring device of grounding system |
-
2012
- 2012-12-17 CN CN 201220693727 patent/CN202975229U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487713A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit |
| CN103605041A (en) * | 2013-11-14 | 2014-02-26 | 国家电网公司 | Non-contact multi-point grounding detection method and system for secondary circuit of current transformer |
| CN103605041B (en) * | 2013-11-14 | 2017-01-18 | 国家电网公司 | Non-contact multi-point grounding detection method and system for secondary circuit of current transformer |
| CN103728483A (en) * | 2013-12-31 | 2014-04-16 | 广东电网公司阳江供电局 | Device and method for detecting current generation of secondary circuit due to disconnecting switch operation |
| CN104198877A (en) * | 2014-09-26 | 2014-12-10 | 国家电网公司 | Portable multipoint grounding detector |
| CN106646119A (en) * | 2016-11-24 | 2017-05-10 | 国网山东省电力公司成武县供电公司 | Ground fault search instrument, and ground fault point search method and system |
| CN106646119B (en) * | 2016-11-24 | 2019-05-10 | 国网山东省电力公司成武县供电公司 | Earth fault searches instrument, earth fault lookup method and system |
| CN109596934A (en) * | 2018-11-30 | 2019-04-09 | 广州格兴全电力科技有限公司 | A kind of double split-core type meter mensurations of secondary circuit multipoint earthing |
| CN109596934B (en) * | 2018-11-30 | 2021-06-01 | 广州格兴全电力科技有限公司 | Secondary circuit multipoint grounding double-clamp meter measuring method |
| CN112557951A (en) * | 2020-12-10 | 2021-03-26 | 中国科学院合肥物质科学研究院 | On-line monitoring device of grounding 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 |
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| CX01 | Expiry of patent term |