CN214543787U - Power supply switching circuit - Google Patents

Power supply switching circuit Download PDF

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Publication number
CN214543787U
CN214543787U CN202120776655.3U CN202120776655U CN214543787U CN 214543787 U CN214543787 U CN 214543787U CN 202120776655 U CN202120776655 U CN 202120776655U CN 214543787 U CN214543787 U CN 214543787U
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CN
China
Prior art keywords
power supply
main power
indicator lamp
circuit
contactor
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Expired - Fee Related
Application number
CN202120776655.3U
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Chinese (zh)
Inventor
陶志成
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Individual
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Individual
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Priority to CN202120776655.3U priority Critical patent/CN214543787U/en
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Publication of CN214543787U publication Critical patent/CN214543787U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems 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
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems

Abstract

The utility model discloses a power supply switching circuit, including main power supply, stand-by power supply and converting circuit, its characterized in that: the main power supply and the standby power supply are both connected with a fuse protector and a leakage protector of a protection circuit, the leakage protector is connected with a contactor, and the contactor is used for automatically converting and interlocking the main power supply and the standby power supply; the conversion circuit is connected with a main power supply and a standby power supply; compared with the complete standby power supply equipment, the utility model has the advantages of low cost, low maintenance technical requirement, convenient inspection and clear vision; carry out automatic switch and carry out the interlocking through two contactors, can also keep apart through the contactor, realize main power supply and stand-by power supply's automatic switch-over.

Description

Power supply switching circuit
Technical Field
The utility model relates to a power technical field specifically indicates a power supply switching circuit.
Background
When the existing main power supply is switched with an emergency or standby power supply, the isolating switch and the double-connection isolating switch need to be operated manually, the manual operation increases the operation amount and the working difficulty, and the manual operation is easy to miss or forget to send the main power supply to an emergency power supply circuit or send the standby power supply to the main power supply circuit, so that potential safety hazards are easy to occur.
Therefore, an automatic power switching circuit is a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims at carrying out automatic switch-over and carrying out the interlocking through two contactors, can also keep apart through the contactor, realize main power source and stand-by power supply's automatic switch-over.
In order to achieve the above purpose, the utility model provides a technical scheme does: a power supply switching circuit comprises a main power supply, a standby power supply and a conversion circuit, and is characterized in that: the main power supply and the standby power supply are both connected with a fuse protector and a leakage protector of a protection circuit, the leakage protector is connected with a contactor, and the contactor is used for automatically converting and interlocking the main power supply and the standby power supply; the conversion circuit is connected with the main power supply and the standby power supply.
As a refinement, the contactor comprises a first contactor connected with a main power supply and a second contactor connected with a standby power supply.
As an improvement, the conversion circuit comprises an intermediate relay, a first contact coil, a first normally closed contact, a main power indicator lamp circuit, a second contact coil, a second normally closed contact and a standby power indicator lamp circuit;
the intermediate relay is connected with a main power supply, the first contact coil is connected with the main power supply, the first normally closed contact is connected with the first contact coil, and the main power supply indicator light circuit is connected with the main power supply; the second contact coil is connected with a standby power supply, the second normally closed contact is connected with the second contact coil, and the standby power supply indicator lamp circuit is connected with the standby power supply.
As an improvement, the main power indicator lamp circuit comprises a main power indicator lamp and a first normally open contact, and the first normally open contact controls the on-off of the main power indicator lamp current.
As an improvement, the standby power indicator lamp circuit comprises a standby power indicator lamp and a second normally open contact, and the second normally open contact controls the on-off of the standby power indicator lamp current.
Compared with the prior art, the utility model the advantage lie in: compared with the complete standby power supply equipment, the utility model has the advantages of low cost, low maintenance technical requirement, convenient inspection and clear vision; carry out automatic switch and carry out the interlocking through two contactors, can also keep apart through the contactor, realize main power supply and stand-by power supply's automatic switch-over.
Drawings
Fig. 1 is a circuit diagram of a power switching circuit according to the present invention.
As shown in the figure: 1. the main power supply, 2, stand-by power supply, 3, fuse, 4, earth-leakage protector, 5, first contactor, 6, second contactor, 7, auxiliary relay, 8, first contact coil, 9, first normally closed contact, 10, second contact coil, 11, second normally closed contact, 12, main power supply pilot lamp, 13, first normally open contact, 14, stand-by power supply pilot lamp, 15, second normally open contact.
Detailed Description
The power switching circuit of the present invention will be described in further detail with reference to the accompanying drawings.
The present invention will be described in detail with reference to fig. 1.
A power supply switching circuit comprises a main power supply 1, a standby power supply 2 and a conversion circuit, and is characterized in that: the main power supply 1 and the standby power supply 2 are both connected with a fuse 3 and a leakage protector 4 of a protection circuit, the leakage protector 4 is connected with a contactor, and the contactor is used for automatic conversion and interlocking of the main power supply 1 and the standby power supply 2; the conversion circuit connects a main power supply 1 and a backup power supply 2.
The contactors include a first contactor 5 connected to the main power supply 1 and a second contactor 6 connected to the backup power supply 2.
The conversion circuit comprises an intermediate relay 7, a first contact coil 8, a first normally closed contact 9, a main power indicator lamp 12 circuit, a second contact coil 10, a second normally closed contact 11 and a standby power indicator lamp 14 circuit;
the intermediate relay 7 is connected with a main power supply 1, the first contact coil 8 is connected with the main power supply 1, the first normally closed contact 9 is connected with the first contact coil 8, and the main power supply indicator lamp 12 is in circuit connection with the main power supply 1; the second contact coil 10 is connected with the standby power supply 2, the second normally closed contact 11 is connected with the second contact coil 10, and the standby power supply indicator lamp 14 is in circuit connection with the standby power supply 2.
The circuit of the main power indicator lamp 12 comprises the main power indicator lamp 12 and a first normally open contact 13, and the first normally open contact 13 controls the on-off of the current of the main power indicator lamp 12.
The standby power indicator lamp 14 circuit comprises a standby power indicator lamp 14 and a second normally open contact 15, and the second normally open contact 15 controls the on-off of the current of the standby power indicator lamp 14.
The utility model relates to a power supply switching circuit's concrete implementation process as follows:
in order to ensure the safety of electricity utilization, the earth leakage protector 4 is respectively arranged at the wire inlet ends of the main power supply 1 and the emergency or standby power supply 2, so that overload, phase loss and earth leakage protection can be realized to ensure the safety of electricity utilization.
When the main power supply 1 is powered on and the main power supply 1 is used all the time, when the main power supply 1 is disconnected, the first contactor 5 connected with the main power supply 1 controls the first normally closed contact 9 to be closed and the second contactor 6 to be closed when the first contact coil 8 is powered off and stops working, the second normally closed contact 11 is disconnected when the second contact coil 10 works, and the first contactor 5 and the second contactor 6 are interlocked.
When the main power supply 1 recovers to supply power, the normally closed contact of the intermediate relay 7 is disconnected, the second normally closed contact 11 is closed when the second contact coil 10 loses power and stops working, the first contact coil 8 obtains power to work the main power supply 1, the first contactor 5 and the second contactor 6 are interlocked, the first normally closed contact 9 is disconnected, the coil of the intermediate relay 7 loses power, the intermediate relay 7 stops working, and the normally closed contact of the intermediate relay 7 is closed and recovered to be normal.
When the main power supply 1 works, the first normally open contact 13 is closed, and the main power supply indicator lamp 12 is normally on; after the main power supply 1 is powered off, the first normally open contact 13 is disconnected, the main power supply indicator lamp 12 is turned off, the standby power supply 2 works, the second normally open contact 15 is closed, and the standby power supply indicator lamp 14 is normally on. The main power supply indicator lamp 12 and the standby power supply indicator lamp 14 are turned on and off, so that inspection and maintenance are facilitated.
The utility model discloses be applicable to three-phase four-wire system circuit more than, be applicable to double-phase three-wire system circuit simultaneously.
The utility model discloses well main power supply 1 uses as power commonly used, only just can the automatic switch-over be stand-by power supply 2 power supplies when main power supply 1 breaks down, treats that main power supply 1 maintains the back that finishes, and the automatic switch-over returns main power supply 1 power supply.
The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims (5)

1. A power switching circuit, comprising: including main power supply (1), stand-by power supply (2) and converting circuit, its characterized in that: the main power supply (1) and the standby power supply (2) are both connected with a fuse (3) and a leakage protector (4) of a protection circuit, the leakage protector (4) is connected with a contactor, and the contactor is used for automatic conversion and interlocking of the main power supply (1) and the standby power supply (2); the conversion circuit is connected with a main power supply (1) and a standby power supply (2).
2. A power switching circuit according to claim 1, wherein: the contactor comprises a first contactor (5) connected with a main power supply (1) and a second contactor (6) connected with a standby power supply (2).
3. A power switching circuit according to claim 2, wherein: the conversion circuit comprises an intermediate relay (7), a first contact coil (8), a first normally closed contact (9), a main power indicator lamp (12) circuit, a second contact coil (10), a second normally closed contact (11) and a standby power indicator lamp (14) circuit;
the intermediate relay (7) is connected with a main power supply (1), the first contact coil (8) is connected with the main power supply (1), the first normally closed contact (9) is connected with the first contact coil (8), and the main power supply indicator lamp (12) is in circuit connection with the main power supply (1); the second contact coil (10) is connected with the standby power supply (2), the second normally closed contact (11) is connected with the second contact coil (10), and the standby power supply indicator lamp (14) is connected with the standby power supply (2) in a circuit mode.
4. A power switching circuit according to claim 3, wherein: the main power source indicator lamp (12) circuit comprises a main power source indicator lamp (12) and a first normally open contact (13), and the first normally open contact (13) controls the on-off of the current of the main power source indicator lamp (12).
5. The power switching circuit of claim 4, wherein: the standby power supply indicator lamp (14) circuit comprises a standby power supply indicator lamp (14) and a second normally open contact (15), and the second normally open contact (15) controls the on-off of the current of the standby power supply indicator lamp (14).
CN202120776655.3U 2021-04-16 2021-04-16 Power supply switching circuit Expired - Fee Related CN214543787U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120776655.3U CN214543787U (en) 2021-04-16 2021-04-16 Power supply switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120776655.3U CN214543787U (en) 2021-04-16 2021-04-16 Power supply switching circuit

Publications (1)

Publication Number Publication Date
CN214543787U true CN214543787U (en) 2021-10-29

Family

ID=78274569

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120776655.3U Expired - Fee Related CN214543787U (en) 2021-04-16 2021-04-16 Power supply switching circuit

Country Status (1)

Country Link
CN (1) CN214543787U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114285150A (en) * 2021-12-17 2022-04-05 南京沃科电子科技有限公司 Vehicle-mounted power supply control power distribution cabinet state monitoring system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114285150A (en) * 2021-12-17 2022-04-05 南京沃科电子科技有限公司 Vehicle-mounted power supply control power distribution cabinet state monitoring system

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Granted publication date: 20211029