CN202840676U - Low-voltage double-power-supply automatic switching device - Google Patents
Low-voltage double-power-supply automatic switching device Download PDFInfo
- Publication number
- CN202840676U CN202840676U CN2012205526556U CN201220552655U CN202840676U CN 202840676 U CN202840676 U CN 202840676U CN 2012205526556 U CN2012205526556 U CN 2012205526556U CN 201220552655 U CN201220552655 U CN 201220552655U CN 202840676 U CN202840676 U CN 202840676U
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- power supply
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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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Abstract
The utility model relates to a low-voltage double-power-supply automatic switching device which structurally comprises a primary power supply loop and a standby power supply loop. Output ends of the primary power supply loop and the standby power supply loop are connected in parallel. A first disconnecting link switch, a first control switch and a first alternating current contactor are connected to the primary power supply loop in series. A first switching control circuit is connected between a phase line and a zero line of the primary power supply loop through a second control switch. A second disconnecting link switch, a third control switch and a second alternating current contactor are connected to the standby power supply loop in series. A second switching control circuit is connected between a phase line and a zero line of standby power supply loop through a fourth control switch. The low-voltage double-power-supply automatic switching device is capable of automatically switching and restoring and low in fault rate, normal operation of a power grid is protected effectively, complete power failure caused by phase loss of the standby power supply when the primary power supply fails can be avoided, and accordingly power failure loss is lowered maximally.
Description
Technical field
The utility model relates to a kind of control circuit of dual power supply, specifically a kind of low-voltage dual power automatic bus.
Background technology
Along with the raising of electrified level, the electric power system power supply quality has become people and generally has been concerned about problem, because many responsible consumers can cause a serious accident or serious economic loss because having a power failure suddenly.For fear of unexpected power failure phenomenon, some responsible consumers all adopt the separately supply power mode of independent current source of two-way, and for subsequent use each other, to prevent power failure or short circuit tripping operation, when one road power supply can not normal power supply therein, another road Power supply can be arranged still.But existing dual power supply mode can not realize hauling oneself willingly into runback, also has certain conversion operations interruption duration, and can not automatic disconnection trouble power loop when the electrical network phase shortage.
The utility model content
The purpose of this utility model just provides a kind of low-voltage dual power automatic bus, with the automatic switching realizing supplying power with double circuit, automatically reply, thereby improves the power supply quality of electric power system.
The utility model is achieved in that a kind of low-voltage dual power automatic bus, comprise main supply electricity loop and stand-by power supply loop that output is connected in parallel, be serially connected with the first chopper switch, the first control switch and the first A.C. contactor in described main supply electricity loop, between phase line in described main supply electricity loop and zero line, connect first by the second control switch and move on to control circuit; Be serially connected with the second chopper switch, the 3rd control switch and the second A.C. contactor in described stand-by power supply loop, between phase line in described stand-by power supply loop and zero line, connect second by the 4th control switch and move on to control circuit.
Described first moves on to control circuit comprises auxiliary relay in parallel and the contactor coil of described the first A.C. contactor, is in series with the normally opened contact of described auxiliary relay and the normally-closed contact of described the second A.C. contactor at the contactor coil branch road of described the first A.C. contactor.
Described second moves on to contactor coil that control circuit comprises described the second A.C. contactor and is connected its normally-closed contact that connects the described auxiliary relay on branch road and the normally-closed contact of described the first A.C. contactor.
On described main supply electricity loop and be connected to phase sequence relay, the normally-closed contact of described phase sequence relay is serially connected on the connection branch road of described auxiliary relay.
The utility model can effectively be protected the normal operation of consumer networks, can avoid whole power failure situations that stand-by power supply causes because of phase shortage in the dead electricity situation of main supply electricity loop, and it is minimum that loss of outage is dropped to.The utility model is simple in structure, invests littlely, and switch speed is fast, utilizes the chain control of double-contact of auxiliary relay and contactor, can haul oneself willingly into runback, failure rate is low, and dependable performance, easy to maintenance, and can realize the manual switchover operation, easy to use.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, the electric power loop that supplies power with double circuit comprises main supply electricity loop and stand-by power supply loop, and the output in main supply electricity loop and stand-by power supply loop is connected in parallel.On main supply electricity loop, be serially connected with successively the first chopper switch QS1, the first control switch ZK1 and the first A.C. contactor CJ1, go back and be connected to phase sequence relay XJ in main supply electricity loop; On the stand-by power supply loop, be serially connected with successively the second chopper switch QS2, the 3rd control switch ZK3 and the second A.C. contactor CJ2.
Between phase line in main supply electricity loop and zero line, connect first by the second control switch ZK2 and move on to control circuit.Described first moves on to control circuit comprises the intermediate relay ZJ that is connected in parallel and the contactor coil Q1 of the first A.C. contactor CJ1, be in series with two normally opened contact ZJ1 and the ZJ2 of intermediate relay ZJ at the contactor coil Q1 of the first A.C. contactor branch road, also be in series with two normally-closed contact CJ21 and the CJ22 of the second A.C. contactor CJ2; Be connected in series the normally-closed contact XJ1 of phase sequence relay XJ at the connection branch road of intermediate relay ZJ.
Between phase line in stand-by power supply loop and zero line, connect second by the 4th control switch ZK4 and move on to control circuit.Described second moves on to contactor coil Q2 that control circuit comprises the second A.C. contactor and is connected its two normally-closed contact ZJ3 that connect intermediate relay ZJ on branch road and ZJ4, also is in series with two normally-closed contact CJ11 and the CJ12 of the first A.C. contactor.
The course of work of the present utility model is:
Under the automatic mode, when the three phase mains in main supply electricity loop and stand-by power supply loop is all normal, two chopper switch QS1, QS2 and four control switch ZK1, ZK2, ZK3, ZK4 close, intermediate relay ZJ gets electric by the normally-closed contact XJ1 of phase sequence relay XJ, its normally opened contact ZJ1, ZJ2 are closed, and normally-closed contact ZJ3, ZJ4 disconnect; The normally-closed contact CJ11 of the first A.C. contactor CJ1 and CJ12 disconnect, two normally-closed contact CJ21 of the second A.C. contactor CJ2 and CJ22 are closed, the contactor coil Q1 of main A.C. contactor CJ1 gets electric by normally opened contact ZJ1, ZJ2 and normally-closed contact CJ21, CJ22, the first A.C. contactor CJ1 on the main supply electricity loop gets electric closure, makes main supply electricity loop normal power supply.And the common closed contact ZJ3 of contactor coil Q2, ZJ4, normally-closed contact CJ11, the CJ12 dead electricity of the second A.C. contactor CJ2 on the stand-by power supply loop make the second A.C. contactor CJ2 dead electricity, and the stand-by power supply loop can not powered operation.
If main supply electricity loop cuts off the power supply suddenly, then the intermediate relay ZJ dead electricity; Or meet main supply electricity loop when phase shortage or phase sequence mistake occur, and phase sequence relay XJ action, the normally-closed contact XJ1 of phase sequence relay disconnects, and makes the intermediate relay ZJ dead electricity.At this moment, normally opened contact ZJ1, the ZJ2 of intermediate relay ZJ disconnects, normally-closed contact ZJ3, ZJ4 are closed, normally-closed contact CJ11, the CJ12 of the first A.C. contactor CJ1 is closed, normally-closed contact CJ21, the CJ22 of the second A.C. contactor CJ2 disconnects, the contactor coil Q2 of the second A.C. contactor CJ2 gets electric by normally-closed contact ZJ3, the ZJ4 of intermediate relay ZJ, normally-closed contact CJ11, the CJ12 of the first A.C. contactor CJ1, make the second A.C. contactor CJ2 on the stand-by power supply loop get electric closure, stand-by power supply loop normal power supply.
When main supply electricity loop recovered normal, intermediate relay ZJ was electricly automatic; Or after eliminating phase shortage and phase sequence error situation, phase sequence relay XJ action, the normally-closed contact XJ1 auto-closing of phase sequence relay, it is electric that intermediate relay ZJ is got.At this moment, normally opened contact ZJ1, the ZJ2 of intermediate relay ZJ is closed, normally-closed contact ZJ3, ZJ4 disconnect, normally-closed contact CJ21, the CJ22 of the second A.C. contactor is closed, normally-closed contact CJ11, the CJ12 of the first A.C. contactor CJ1 disconnects, the contactor coil Q1 of the first A.C. contactor gets electric by contact ZJ1, ZJ2, CJ21, CJ22, the first A.C. contactor CJ1 gets electric closure, and main supply electricity loop begins normal power supply; Meanwhile, the contactor coil Q2 of the second A.C. contactor CJ2 on the stand-by power supply loop passes through contact ZJ3, ZJ4, CJ11, CJ12 dead electricity, the second A.C. contactor CJ2 dead electricity, and stop power supply in the stand-by power supply loop.
Under the manual work state; close the first chopper switch QS1 and the first, the 3rd control switch ZK1, ZK3 disconnect the second chopper switch QS2 and the second, the 4th control switch ZK2, ZK4, then main supply electricity loop works; do not work in the stand-by power supply loop, phase sequence relay XJ works.Disconnect the first chopper switch QS1 and the first, the 3rd control switch ZK1, ZK3, close the second chopper switch QS2 and the second, the 4th control switch ZK2, ZK4, stand-by power supply loop works then, do not work in main supply electricity loop, and phase sequence relay XJ is inoperative.
Claims (4)
1. low-voltage dual power automatic bus, comprise main supply electricity loop and stand-by power supply loop that output is connected in parallel, it is characterized in that, be serially connected with the first chopper switch, the first control switch and the first A.C. contactor in described main supply electricity loop, between phase line in described main supply electricity loop and zero line, connect first by the second control switch and move on to control circuit; Be serially connected with the second chopper switch, the 3rd control switch and the second A.C. contactor in described stand-by power supply loop, between phase line in described stand-by power supply loop and zero line, connect second by the 4th control switch and move on to control circuit.
2. low-voltage dual power automatic bus according to claim 1, it is characterized in that, described first moves on to control circuit comprises auxiliary relay in parallel and the contactor coil of described the first A.C. contactor, is in series with the normally opened contact of described auxiliary relay and the normally-closed contact of described the second A.C. contactor at the contactor coil branch road of described the first A.C. contactor.
3. low-voltage dual power automatic bus according to claim 1, it is characterized in that described second moves on to contactor coil that control circuit comprises described the second A.C. contactor and be connected its normally-closed contact that connects the described auxiliary relay on branch road and the normally-closed contact of described the first A.C. contactor.
4. low-voltage dual power automatic bus according to claim 2 is characterized in that, on described main supply electricity loop and be connected to phase sequence relay, the normally-closed contact of described phase sequence relay is serially connected on the connection branch road of described auxiliary relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205526556U CN202840676U (en) | 2012-10-26 | 2012-10-26 | Low-voltage double-power-supply automatic switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205526556U CN202840676U (en) | 2012-10-26 | 2012-10-26 | Low-voltage double-power-supply automatic switching device |
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| Publication Number | Publication Date |
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| CN202840676U true CN202840676U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205526556U Expired - Fee Related CN202840676U (en) | 2012-10-26 | 2012-10-26 | Low-voltage double-power-supply automatic switching device |
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| CN (1) | CN202840676U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958633A (en) * | 2016-06-22 | 2016-09-21 | 中航太克（厦门）电力技术股份有限公司 | Two-way power supply automatic switching power supply circuit |
| CN106487091A (en) * | 2016-08-26 | 2017-03-08 | 国家电网公司客户服务中心南方分中心 | A kind of double loop power supply device of WMG |
| CN109654051A (en) * | 2019-03-04 | 2019-04-19 | 大唐华银电力股份有限公司金竹山火力发电分公司 | A kind of high-voltage frequency converter cooling fan power supply switching circuit and switching method |
-
2012
- 2012-10-26 CN CN2012205526556U patent/CN202840676U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958633A (en) * | 2016-06-22 | 2016-09-21 | 中航太克（厦门）电力技术股份有限公司 | Two-way power supply automatic switching power supply circuit |
| CN106487091A (en) * | 2016-08-26 | 2017-03-08 | 国家电网公司客户服务中心南方分中心 | A kind of double loop power supply device of WMG |
| CN109654051A (en) * | 2019-03-04 | 2019-04-19 | 大唐华银电力股份有限公司金竹山火力发电分公司 | A kind of high-voltage frequency converter cooling fan power supply switching circuit and switching method |
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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: 20130327 Termination date: 20131026 |