CN2437069Y - Low-voltage protector with wrong action resistance for high-voltage motor - Google Patents
Low-voltage protector with wrong action resistance for high-voltage motor Download PDFInfo
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- CN2437069Y CN2437069Y CN 00215687 CN00215687U CN2437069Y CN 2437069 Y CN2437069 Y CN 2437069Y CN 00215687 CN00215687 CN 00215687 CN 00215687 U CN00215687 U CN 00215687U CN 2437069 Y CN2437069 Y CN 2437069Y
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- voltage
- under
- normally closed
- relay
- intermediate relay
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Abstract
The utility model provides a low-voltage protector with wrong action resistance for a high-voltage motor, which comprises a high-voltage motor low-voltage protector. The utility model is characterized in that a low-voltage relay YJ4 is additionally provided and connected with a feeder bus-bar; contacts of the low-voltage relay YJ4 are connected with the high-voltage motor low-voltage protector. Through that the low-voltage relay YJ4 senses the voltage signal of the feeder bus-bar, the utility model can guarantee that the low-voltage protector does not act because of the independent failure of a voltage transformer when the voltage of the feeder bus-bar is normal to achieve the purpose of low-voltage protection with the wrong action resistance so as to guarantee the normal operation of the high-voltage motor.
Description
The utility model provides the undervoltage protection of the high-tension motor with false action-proof, belongs to electrical relay protection control technology field.
When the power supply buses short time voltage of high-tension motor reduced or interrupt recovering again, under-voltage protection was disposed in the serious reduction of supply voltage usually on high capacity motor when preventing motor self-staring.When the power supply buses voltage drop was low to moderate certain value, time-delay made power supply buses enough voltage be arranged to guarantee prior motor self-staring high capacity motor or the excision of less important motor.High-tension motor under-voltage protection device generally comprises voltage relay YJ
1～3, time relay sj
1～2, intermediate relay ZJ
1～5, direct current supervisory relay JJ and signal lamp etc., under-voltage replay YJ
1～3Correspondence and voltage transformer pt
1～3Serial connection, its normally closed contact also connects back one termination and protects little bus+BM, and the other end connects intermediate relay ZJ through itself and the normal opened contact that connects respectively
1, through intermediate relay ZJ
1Normal opened contact and connect time relay sj
1～2, intermediate relay ZJ
1With time relay sj
1～2Another termination protect little bus-BM, time relay sj
1～2Normal opened contact corresponding with and the intermediate relay ZJ that connects
2～3, intermediate relay ZJ
4～5After the serial connection, be attempted by the little bus+BM of protection, protect between little bus-BM.Its function is: 1, when power supply buses when decompression or voltage are reduced to certain value in short-term, and voltage relay YJ
1～3Action, its normal opened contact disconnects, its normally closed contact closure, through intermediate relay ZJ
1Normally closed contact relay start-up time SJ
1～2, and then connect intermediate relay ZJ
4～5, intermediate relay ZJ
2～3, make synchronous motor, the high-voltage asynchronous motor tripping operation of native system; 2, breaking protection, when single-phase wire break takes place in voltage transformer first and second, intermediate relay ZJ
1Action disconnects its normally closed contact, thus opening time relay SJ
1～2The loop, prevent the under-voltage protection misoperation.
Defective is that this protective device can not be distinguished the reason that voltage reduces: when power supply buses breaks down when causing voltage to reduce; it makes the voltage relay action and the tripping high-tension motor; when voltage transformer breaks down; it also can cause the voltage relay action; the tripping high-tension motor, promptly so-called misoperation.
The purpose of this utility model provides a kind of high-tension motor undervoltage protection that can overcome above-mentioned defective, have false action-proof.
The purpose of this utility model is achieved in that
Comprise high-tension motor under-voltage protection device, it is characterized in that: set up under-voltage replay YJ
4Connect power supply buses, its contact connects high-tension motor under-voltage protection device.
Described high-tension motor undervoltage protection with false action-proof, high-tension motor under-voltage protection device comprises under-voltage replay YJ
1～3, time relay sj
1～2, intermediate relay ZJ
1～5, under-voltage replay YJ wherein
1～3Correspondence connects the secondary line voltage of voltage transformer pt, and its normally closed contact also connects back one termination and protects little bus+BM, and the other end connects intermediate relay ZJ through itself and the normal opened contact that connects respectively
1, through intermediate relay ZJ
1Normally closed contact connect time relay sj respectively
1～2, intermediate relay ZJ
1With time relay sj
1～2Another termination protect little bus-BM, time relay sj
1～2Normal opened contact corresponding with and the intermediate relay ZJ that connects
2～3, intermediate relay ZJ
4～5After the serial connection, be attempted by the little bus+BM of protection, protect between little bus-BM.
Described high-tension motor undervoltage protection with false action-proof, under-voltage replay YJ
4Normally closed contact, normal opened contact respectively with high-tension motor under-voltage protection device in under-voltage replay YJ
1～3Normally closed contact, normal opened contact and connect.
Described high-tension motor undervoltage protection with false action-proof, under-voltage replay YJ
4Normally closed contact be serially connected in the normally closed contact and the under-voltage replay YJ of intermediate relay ZJ 1
1～3Normally closed contact between.
Operation principle is: the under-voltage replay YJ of high-tension motor under-voltage protection device
1～3, its voltage acquisition is also pressed the voltage transformer secondary wiring, the under-voltage replay YJ that sets up
4Connect power supply buses, be used for gathering the power supply buses voltage signal.When the outage or the fault that is short-circuited of short time, under-voltage replay YJ take place power supply buses
1～4All action makes intermediate relay ZJ
1Dead electricity, its normally closed contact ZJ
1Closure, and then make time relay sj
1～2Get electronic work, connect intermediate relay ZJ
4～5Make the tripping operation of this electric power system high pressure synchronous motor, connect intermediate relay ZJ
2～3Make the high-voltage asynchronous machine tripping operation of this electric power system.Normal when power supply buses voltage, when voltage transformer self breaks down, because of under-voltage replay YJ
4Connect power supply buses, keep intermediate relay ZJ
1Charged, its normally closed contact ZJ
1Disconnected and led to time relay sj
1～2Passage, make the under-voltage protection device that misoperation not take place.
The utility model compared with prior art has following advantage: on the basis of original high-tension motor under-voltage protection device function, set up under-voltage replay YJ
4, by the voltage signal of its inductive power supply bus, can guarantee normal when power supply buses voltage, when breaking down because of voltage transformer self, this device is failure to actuate, and reaches under-voltage protection false action-proof purpose, thereby guarantees the normal operation of process units.
Fig. 1 is the operation principle block diagram of the utility model and application thereof;
Fig. 2 is the circuit diagram of the utility model one embodiment;
Fig. 3 is the circuit diagram of another embodiment of the utility model;
The utility model is described in further detail below in conjunction with accompanying drawing:
Among Fig. 2: under-voltage replay YJ
2～3Correspondence connects the secondary line voltage of voltage transformer pt, and its normally closed contact also connects back one termination and protects little bus+BM, and the other end connects intermediate relay ZJ through itself and the normal opened contact that connects respectively
1, through intermediate relay ZJ
1Normally closed contact connect time relay sj respectively
1-2, intermediate relay ZJ
1With time relay sj
1-2Another termination protect little bus-BM, time relay sj
1～2Normal opened contact corresponding with and the intermediate relay ZJ that connects
2～3, intermediate relay ZJ
4～5After the serial connection, be attempted by the little bus+BM of protection, protect between little bus-BM.Under-voltage replay YJ
4Connect power supply buses, its normally closed contact, normal opened contact correspondence and under-voltage replay YJ
1～3Normally closed contact, normal opened contact and connect.
Among Fig. 3: under-voltage replay YJ
1～3Correspondence connects the secondary line voltage of voltage transformer pt, and its normally closed contact also connects back one termination and protects little bus+BM, and the other end connects intermediate relay ZJ through itself and the normal opened contact that connects respectively
1, through intermediate relay ZJ
1Normally closed contact connect time relay sj respectively
1～2, intermediate relay ZJ
1With time relay sj
1～2Another termination protect little bus-BM, time relay sj
1～2Normal opened contact corresponding with and the intermediate relay ZJ that connects
2～3, intermediate relay ZJ
4～5After the serial connection, be attempted by the little bus+BM of protection, protect between little bus-BM.Under-voltage replay YJ
4Connect power supply buses, its normally closed contact is serially connected in intermediate relay ZJ
1Normally closed contact and under-voltage replay YJ
1～3Normally closed contact between.
Because high-tension motor under-voltage protection device is a prior art, it is connected also for conventional, so detail circuits figure is not provided with voltage transformer.
Claims (4)
1, a kind of high-tension motor undervoltage protection with false action-proof comprises high-tension motor under-voltage protection device, it is characterized in that: set up under-voltage replay YJ
4Connect power supply buses, its contact connects high-tension motor under-voltage protection device.
2, the high-tension motor undervoltage protection with false action-proof as claimed in claim 1, it is characterized in that: high-tension motor under-voltage protection device comprises under-voltage replay YJ
1～3, time relay sj
1～2And intermediate relay ZJ
1～5, under-voltage replay YJ wherein
1～3Correspondence connects the secondary line voltage of voltage transformer pt, and its normally closed contact also connects back one termination and protects little bus+BM, and the other end connects intermediate relay ZJ through itself and the normal opened contact that connects respectively
1, through intermediate relay ZJ
1Normally closed contact connect time relay sj respectively
1～2, intermediate relay ZJ
1With time relay sj
1～2Another termination protect little bus-BM, time relay sj
1～2Normal opened contact corresponding with and the intermediate relay ZJ that connects
2～3, intermediate relay ZJ
4～5After the serial connection, be attempted by the little bus+BM of protection, protect between little bus-BM.
3, as claim 1,2 described high-tension motor undervoltage protections, it is characterized in that: under-voltage replay YJ with false action-proof
4Normally closed contact, normal opened contact corresponding with under-voltage replay YJ
1～3Normally closed contact, normal opened contact and connect.
4, as claim 1,2 described high-tension motor undervoltage protections, it is characterized in that: under-voltage replay YJ with false action-proof
4Normally closed contact be serially connected in intermediate relay ZJ
1Normally closed contact and under-voltage replay YJ
1～3Normally closed contact between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00215687 CN2437069Y (en) | 2000-07-28 | 2000-07-28 | Low-voltage protector with wrong action resistance for high-voltage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00215687 CN2437069Y (en) | 2000-07-28 | 2000-07-28 | Low-voltage protector with wrong action resistance for high-voltage motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2437069Y true CN2437069Y (en) | 2001-06-27 |
Family
ID=33581578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00215687 Expired - Fee Related CN2437069Y (en) | 2000-07-28 | 2000-07-28 | Low-voltage protector with wrong action resistance for high-voltage motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2437069Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117533A (en) * | 2013-03-11 | 2013-05-22 | 南京因泰莱电器股份有限公司 | Method for preventing false operation of motor in PT (potential transformer) maintenance |
| CN109066604A (en) * | 2018-09-27 | 2018-12-21 | 岭澳核电有限公司 | The generator under-voltage protection system at million kilowatt nuclear power station |
| CN109737296A (en) * | 2018-12-18 | 2019-05-10 | 中国神华能源股份有限公司 | Oil pump control method and device, system, storage medium, electronic device |
| CN111271840A (en) * | 2020-03-09 | 2020-06-12 | 珠海格力电器股份有限公司 | Effective voltage abnormity protection method and device and air conditioning unit |
-
2000
- 2000-07-28 CN CN 00215687 patent/CN2437069Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117533A (en) * | 2013-03-11 | 2013-05-22 | 南京因泰莱电器股份有限公司 | Method for preventing false operation of motor in PT (potential transformer) maintenance |
| CN103117533B (en) * | 2013-03-11 | 2015-09-30 | 南京因泰莱电器股份有限公司 | The method of motor malfunction is prevented during a kind of PT maintenance |
| CN109066604A (en) * | 2018-09-27 | 2018-12-21 | 岭澳核电有限公司 | The generator under-voltage protection system at million kilowatt nuclear power station |
| CN109066604B (en) * | 2018-09-27 | 2020-04-14 | 岭澳核电有限公司 | Generator low-voltage protection system of million-kilowatt nuclear power station |
| CN109737296A (en) * | 2018-12-18 | 2019-05-10 | 中国神华能源股份有限公司 | Oil pump control method and device, system, storage medium, electronic device |
| CN111271840A (en) * | 2020-03-09 | 2020-06-12 | 珠海格力电器股份有限公司 | Effective voltage abnormity protection method and device and air conditioning unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |