CN206076925U - Secondary circuit of transformer protection interlocking cutting generator matched line - Google Patents
Secondary circuit of transformer protection interlocking cutting generator matched line Download PDFInfo
- Publication number
- CN206076925U CN206076925U CN201621038080.0U CN201621038080U CN206076925U CN 206076925 U CN206076925 U CN 206076925U CN 201621038080 U CN201621038080 U CN 201621038080U CN 206076925 U CN206076925 U CN 206076925U
- Authority
- CN
- China
- Prior art keywords
- transformer
- auxiliary contact
- pressing plate
- switch
- electromotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000009466 transformation Effects 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The utility model provides a secondary circuit that generator configuration was qualified for next round of competitions is cut in transformer protection interlocking establishes ties in proper order between control bus input + KM and control bus output-KM has two combined floodgate switches KK, the tripping operation coil TQ of circuit breaker auxiliary contact QF and switch. The utility model discloses the auxiliary contact QS is normally opened to the primary isolator of a transformer of inserting before transformer cut generator configuration outgoing line's clamp plate LP, and the primary isolator of transformer normally opens the auxiliary contact QS other end and is connected with transformer protection action contact JD. When the transformer is subjected to a protection test, the primary isolating switch must be disconnected, QS is also disconnected, and even if the pressing plate LP of the motor output line is continuously developed, the circuit loses a positive power supply due to the QS is disconnected, the generator output line cannot be switched off, so that the non-accident tripping and shutdown are avoided, the economic loss is reduced, and the safe power supply is ensured.
Description
Technical field
This utility model belongs to electric wiring field, more particularly to a kind of to prevent tranformer protection test from cutting electromotor by mistake
Tranformer protection interlocking cuts secondary circuit of the electromotor with outlet.
Background technology
With people's energy saving and the enhancing of environmental consciousness, the energy-saving and environmental protection electromotor for newly increasing is more and more, especially
In iron and steel system, the TRT electromotors of many overpressure generator of blast furnace and combustion gas are newly gone up, and most of electromotors are all connected on total drop
Subordinate electric substation of the pressure electric substation with outlet institute band, electric pressure is 10kV or 6kV, and grid entry point enters in the inlet wire of electric substation of subordinate
On mouth.
In order to the non-Switching Synchronization accident for preventing generator connecting in parallel with system occurs, line is sent with electromotor in the secondary switch of main transformer and opened
Install interlocking between pass additional.Transformer overcurrent, differential, grave gas protection act, tripping operation are cut to cut while main transformer first and second is switched and are sent out
Switch of the motor with outlet.Have on the sealer of transformator and cut pressing plate of the electromotor with outlet, controlled whether by pressing plate
Electromotor is cut with outlet.But the defect for existing is：Sometimes testing crew or electric substation operator on duty, are carrying out transformer test
When, if forgetting to disconnect this pressing plate, the electromotor for causing normal operation is tripped with outlet, causes human accident to shut down, and band
Carry out very big economic loss.
The content of the invention
This utility model provides a kind of tranformer protection interlocking and cuts secondary circuit of the electromotor with outlet, its object is to prevent
When only tranformer protection is tested, cause to trip with outlet with the electromotor of transformator interlocking relation due to cutting by mistake, it is to avoid non-thing
Therefore shut down.
For this purpose, the technical solution taken by this utility model is：
A kind of tranformer protection interlocking cuts secondary circuit of the electromotor with outlet, in control bus input+KM and control
The breaking coil TQ of two closing switch KK, chopper auxiliary contact QF and switch is sequentially connected in series between bus outfan-KM,
Transformator cuts the tranformer protection action connection point JD one end of electromotor with outlet connection control bus input+KM, other end string
Connection pressing plate LP, before the pressing plate LP other ends are connected to chopper auxiliary contact QF.This utility model accesses a change before pressing plate LP
The normally opened auxiliary contact QS of disconnecting switch of depressor, the normally opened auxiliary contact QS other ends of disconnecting switch of transformator and transformator
Protection act contact JD connects.
The beneficial effects of the utility model are：
When transformator carries out protection test, one time disconnecting switch have to be off, and QS also disconnects, even if at this moment continually developing
Motor sends the pressing plate LP of line, and because QS disconnects, this loop loses positive supply, also will be unable to make electromotor cut lock with outlet, so as to
Avoid non-emergency stop valve trip from shutting down, reduce economic loss, it is ensured that safe power supply.
Description of the drawings
Fig. 1 is that former tranformer protection interlocking cuts secondary circuit graph of the electromotor with outlet；
Fig. 2 is to change rear tranformer protection interlocking to cut secondary circuit graph of the electromotor with outlet.
In figure：Control bus input+KM, control bus outfan-KM, closing switch KK, chopper auxiliary contact QF,
The breaking coil TQ of switch, tranformer protection action connection point JD, pressing plate LP, the normally opened auxiliary contact of disconnecting switch of transformator
QS。
Specific embodiment
As seen from Figure 1, former tranformer protection interlocking cuts secondary circuit of the electromotor with outlet, control bus input+
The jump of two closing switch KK, chopper auxiliary contact QF and switch is sequentially connected in series between KM and control bus outfan-KM
Brake cable circle TQ, transformator cut the tranformer protection action connection point JD one end of electromotor with outlet connection control bus input+KM,
Other end series connection pressing plate LP, before the pressing plate LP other ends are connected to chopper auxiliary contact QF.
Fig. 2 shows that this utility model is that the normally opened auxiliary contact of disconnecting switch of a transformator is accessed before pressing plate LP
QS, the normally opened auxiliary contact QS other ends of disconnecting switch of transformator are connected with tranformer protection action connection point JD.So as to avoid
The electromotor that tranformer protection test mistiming is cut electromotor and caused is with outlet tripping operation.
Claims (1)
1. a kind of tranformer protection interlocking cuts secondary circuit of the electromotor with outlet, female with control in control bus input+KM
The breaking coil TQ of two closing switch KK, chopper auxiliary contact QF and switch is sequentially connected in series between line output terminal-KM, is become
Depressor cuts the tranformer protection action connection point JD one end of electromotor with outlet connection control bus input+KM, other end series connection
Pressing plate LP, before the pressing plate LP other ends are connected to chopper auxiliary contact QF a, it is characterised in that transformation is accessed before pressing plate LP
The normally opened auxiliary contact QS of disconnecting switch of device, the normally opened auxiliary contact QS other ends of disconnecting switch of transformator are protected with transformator
The JD connections of shield action connection point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621038080.0U CN206076925U (en) | 2016-09-06 | 2016-09-06 | Secondary circuit of transformer protection interlocking cutting generator matched line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621038080.0U CN206076925U (en) | 2016-09-06 | 2016-09-06 | Secondary circuit of transformer protection interlocking cutting generator matched line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206076925U true CN206076925U (en) | 2017-04-05 |
Family
ID=58436982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621038080.0U Expired - Fee Related CN206076925U (en) | 2016-09-06 | 2016-09-06 | Secondary circuit of transformer protection interlocking cutting generator matched line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206076925U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108089119A (en) * | 2017-11-17 | 2018-05-29 | 国网湖南省电力有限公司 | Substation relay protection secondary device secondary circuit live detection method and system |
-
2016
- 2016-09-06 CN CN201621038080.0U patent/CN206076925U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108089119A (en) * | 2017-11-17 | 2018-05-29 | 国网湖南省电力有限公司 | Substation relay protection secondary device secondary circuit live detection method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170405 |