CN201956742U - Circuit for automatically switching main power supply and standby power supply - Google Patents
Circuit for automatically switching main power supply and standby power supply Download PDFInfo
- Publication number
- CN201956742U CN201956742U CN2010206623696U CN201020662369U CN201956742U CN 201956742 U CN201956742 U CN 201956742U CN 2010206623696 U CN2010206623696 U CN 2010206623696U CN 201020662369 U CN201020662369 U CN 201020662369U CN 201956742 U CN201956742 U CN 201956742U
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- CN
- China
- Prior art keywords
- power supply
- circuit
- contactor
- time relay
- primary power
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Stand-By Power Supply Arrangements (AREA)
Abstract
A circuit for automatically switching a main power supply and a standby power supply comprises a main power supply circuit, a standby power supply circuit, a load circuit, a first contactor, a second contactor, a third contactor, a first time relay and a second time relay, wherein the load circuit is connected with the main power supply circuit via the main contact of the second contactor, and is further connected with the standby power supply circuit via the main contact of the third contactor. Compared with the prior art, the circuit for automatically switching the main power supply and the standby power supply adopted in the utility model has the advantages as follows: firstly, the structure is simple and the cost is low; secondly, the automatic switching between the main power supply and the standby power supply is realized, and the impact current generated by the simultaneous power supply of the main and the standby power supply circuits can be effectively avoided; and thirdly, the main power supply can be automatically locked, and the power supply can be automatically switched into the main power supply when the main power supply is charged.
Description
Technical field
The utility model relates to a kind of electric supply commutation circuit, is specifically related to a kind of active and standby power supply automatic switchover circuit of using.
Background technology
At present, primary power cource, stand-by power supply two-way power supply supply power mode is simultaneously all adopted in each loop in the equipment centrally connected power supply system of important department such as railway signal and hospital.Wherein one the tunnel as the primary power cource powering load, and another road energized is as standby.When primary power cource breaks down when outage, cut off primary power cource, connect another road stand-by power supply and continue powering load, for the reliability service of relevant device provides the power supply guarantee.But because power failure has unpredictability, rely on manual operation to tend to cause the outage of short time, be difficult to guarantee the continuity of powering, so that bring unnecessary loss or danger.
The utility model content
The purpose of this utility model is exactly the defective that exists at prior art, and a kind of active and standby power supply automatic switchover circuit of using is provided.This commutation circuit can realize active and standby automatic conversion with power supply.
Its technical scheme is: comprise primary power cource circuit, stand-by power supply circuit, load circuit, first contactor, second contactor, the 3rd contactor, very first time relay and second time relay, load circuit is connected with the primary power cource circuit by the main contacts of second contactor, and load circuit also is connected with the stand-by power supply circuit by the main contacts of the 3rd contactor.Be connected in parallel to first contactor between described primary power cource circuit phase line end and the primary power cource circuit zero line side, primary power cource circuit phase line end is connected with an end of very first time relay, an end of second contactor by the normally-closed contact of the 3rd contactor, and primary power cource circuit zero line side is connected with the other end of very first time relay and the normally opened contact by very first time relay is connected with the other end of second contactor; Be connected with an end of second time relay and an end of the 3rd contactor behind the normally-closed contact of described stand-by power supply circuit phase line end by normally-closed contact, second contactor of first contactor of series connection, stand-by power supply circuit zero line side is connected with the other end of second time relay and the normally opened contact by second time relay is connected with the other end of the 3rd contactor.
The active and standby electricity consumption that the utility model adopts is derived from the circuit of moving conversion, makes it compared with prior art, has following advantage: 1, simple in structure, with low cost; 2, not only realize active and standby automatic conversion with power supply, but also avoided primary power cource, the stand-by power supply two-way power supply problem of power supply station's impulse current that can produce simultaneously effectively; 3, possess the characteristic that automatically locks primary power cource, when primary power cource has electricity, can automatically switch to the primary power cource power supply.
Description of drawings
Fig. 1 is the circuit theory diagrams of a kind of embodiment of the utility model.
Embodiment
With reference to Fig. 1, a kind of active and standby power supply automatic switchover circuit of using, comprise primary power cource circuit A, stand-by power supply circuit B, load circuit C, the first contactor KM1, the second contactor KM2, the 3rd contactor KM3, very first time relay K MT1 and second time relay KMT2, load circuit C is connected with primary power cource circuit A by the main contacts KM2-1 of second contactor, and load circuit C also is connected with stand-by power supply circuit B by the main contacts KM3-1 of the 3rd contactor.Be connected in parallel to the first contactor KM1 between described primary power cource circuit A phase line end L1 and the primary power cource circuit A zero line side N1, primary power cource circuit A phase line end L1 is connected with the end of very first time relay K MT1, the end of the second contactor KM2 by the normally-closed contact KM3-2 of the 3rd contactor KM3, and primary power cource circuit A zero line side N1 is connected with the other end of very first time relay K MT1 and the normally opened contact KMT1-1 by very first time relay K MT1 is connected with the other end of the second contactor KM2; Be connected with the end of second time relay KMT2 and the end of the 3rd contactor KM3 behind the normally-closed contact KM2-2 of normally-closed contact KM1-1, the second contactor KM2 of described stand-by power supply circuit B phase line end L2 by the first contactor KM1 of series connection, stand-by power supply circuit B zero line side N2 is connected with the other end of second time relay KMT2 and the normally opened contact KMT2-1 by second time relay KMT2 is connected with the other end of the 3rd contactor KM3.
During operation, when primary power cource circuit A has electricity, the first contactor KM1 adhesive, its normally-closed contact KM1-1 disconnects the current supply circuit of second time relay KMT2 and the 3rd contactor KM3.Simultaneously, very first time relay K MT1 gets electric work by the normally-closed contact KM3-2 of the 3rd contactor KM3, its normally opened contact KMT1-1 closure behind the certain hour, second contactor KM2 work, the main contacts KM2-1 closure of the second contactor KM2, primary power cource circuit A begins to power to load circuit C.When primary power cource circuit A has a power failure suddenly, the first contactor KM1, very first time relay K MT1 and the second contactor KM2 all quit work and reset, simultaneously, the normally-closed contact KM2-2 closure of the normally-closed contact KM1-1 of the first contactor KM1 and the second contactor KM2, second time relay KMT2 gets electric work, its normally opened contact KMT2-1 closure behind the certain hour, the main contacts KM3-1 closure of the 3rd contactor KM3, stand-by power supply circuit B begins to power to load circuit C.When having a power failure at primary power cource circuit A, when stand-by power supply circuit B powers to load circuit C, send a telegram here as primary power cource circuit A, the then first contactor KM1 adhesive, its normally-closed contact KM1-1 disconnects the current supply circuit of second time relay KMT2 and the 3rd contactor KM3, realizes that returning primary power cource circuit A powers to load circuit C.
Claims (1)
1. active and standby power supply automatic switchover circuit of using, comprise the primary power cource circuit, the stand-by power supply circuit, load circuit, first contactor, second contactor, the 3rd contactor, the very first time relay and second time relay, load circuit is connected with the primary power cource circuit by the main contacts of second contactor, load circuit also is connected with the stand-by power supply circuit by the main contacts of the 3rd contactor, it is characterized in that: be connected in parallel to first contactor between described primary power cource circuit phase line end and the primary power cource circuit zero line side, primary power cource circuit phase line end is by the normally-closed contact of the 3rd contactor and an end of very first time relay, one end of second contactor is connected, and primary power cource circuit zero line side is connected with the other end of very first time relay and the normally opened contact by very first time relay is connected with the other end of second contactor; Be connected with an end of second time relay and an end of the 3rd contactor behind the normally-closed contact of described stand-by power supply circuit phase line end by normally-closed contact, second contactor of first contactor of series connection, stand-by power supply circuit zero line side is connected with the other end of second time relay and the normally opened contact by second time relay is connected with the other end of the 3rd contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206623696U CN201956742U (en) | 2010-12-04 | 2010-12-04 | Circuit for automatically switching main power supply and standby power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206623696U CN201956742U (en) | 2010-12-04 | 2010-12-04 | Circuit for automatically switching main power supply and standby power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201956742U true CN201956742U (en) | 2011-08-31 |
Family
ID=44500844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206623696U Expired - Fee Related CN201956742U (en) | 2010-12-04 | 2010-12-04 | Circuit for automatically switching main power supply and standby power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201956742U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868214A (en) * | 2012-09-18 | 2013-01-09 | 四川省电力公司达州电业局 | utomatic standby power supply switching box in small water power station |
| CN110534368A (en) * | 2019-09-06 | 2019-12-03 | 贵州泰永长征技术股份有限公司 | With the interlock circuit of long distance safety interlock function between a kind of breaker for multiple power supplies |
-
2010
- 2010-12-04 CN CN2010206623696U patent/CN201956742U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868214A (en) * | 2012-09-18 | 2013-01-09 | 四川省电力公司达州电业局 | utomatic standby power supply switching box in small water power station |
| CN110534368A (en) * | 2019-09-06 | 2019-12-03 | 贵州泰永长征技术股份有限公司 | With the interlock circuit of long distance safety interlock function between a kind of breaker for multiple power supplies |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20111204 |