Simple three-phase dual-power switching device for different-phase monitoring
By designing a simple three-phase dual power switching device for different phase monitoring, automatic switching and phase sequence error detection during power outage of the main supply power supply is solved, and the problems of automatic switching and phase sequence error detection of the communication station power supply system are ensured, ensuring the safe operation of the equipment and saving manpower.
Patent Information
- Application Number
- CN202421203502.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The existing communication station power supply system needs to manually switch to the backup power supply when the main power supply is out of power, resulting in the inability to operate auxiliary equipment such as air conditioners, causing the temperature rise in the computer room to rise too fast, threatening the safe operation of the equipment.
A simple three-phase dual power switching device for monitoring different phases is designed. Through the linkage of the circuit breaker and the contactor, the main power supply is automatically switched to the backup power when the main power supply is out of power, and the phase sequence error is automatically detected through the indicator light to remind the operator to repair.
It realizes automatic switching to the backup power supply when the main supply power is out of power, avoids the temperature rise problem of the computer room caused by the inability to operate by the auxiliary equipment, saves manpower, and accurately detects phase sequence errors through indicator lights, reminds operators to repair in a timely manner.
Smart Images
Figure CN222582117U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a simple three-phase dual-power supply switching device for monitoring different phases, belonging to the technical field of low-voltage power distribution. Background Art
[0002] The power supply system of a company's communication station is a two-way AC 380V power supply, which is provided to the UPS and other auxiliary equipment in the computer room. If the main power supply fails, it needs to be manually disconnected and switched to the backup power supply. If the switch fails in time, the auxiliary air-conditioning equipment will not be able to operate, which will cause the temperature in the computer room to rise too quickly, threatening the safe operation of the equipment. At the same time, the two power supplies are under maintenance, and the phase sequence is easily changed. Even if the switch can be made in time, the auxiliary equipment such as the air conditioner will not be able to operate, threatening the normal operation of the equipment. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a simple three-phase dual power switching device with different phase monitoring, which can automatically switch to the backup power supply when the main power supply is cut off. The switching is timely and no manual operation is required, thus saving manpower. At the same time, it can also automatically detect the two phases with wrong phase sequence through the indicator light, and remind the operator to repair it in time.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0005] A simple three-phase dual power switching device for monitoring different phases comprises a three-phase main power supply and a three-phase standby power supply, wherein the three-phase main power supply is sequentially connected to the normally closed contacts of a circuit breaker K1 and a contactor J1 and then connected to a computer room power supply, and the three-phase standby power supply is sequentially connected to the normally closed contacts of a circuit breaker K2 and a contactor J2 and then connected to a computer room power supply, a coil of the contactor J1 and a normally open contact of the contactor J2 are connected between the B phase and the C phase of the three-phase main power supply, and a coil of the contactor J2 and a normally open contact of the contactor J1 are connected between the B phase and the C phase of the three-phase standby power supply, so as to realize the linkage between the contactors J1 and J2; a resistor RA1, an indicator light LA and a resistor RA2 are sequentially connected between the main power supply phase A and the standby power supply phase A upstream of the circuit breakers K1 and K2, a resistor RB1, an indicator light LB and a resistor RB2 are sequentially connected between the main power supply phase B and the standby power supply phase B, and a resistor RC1, an indicator light LC and a resistor RC2 are sequentially connected between the main power supply phase C and the standby power supply phase C.
[0006] A further improvement of the technical solution of the utility model is that the voltage of the three-phase main power supply and the three-phase standby power supply are both 380V.
[0007] A further improvement of the technical solution of the utility model is that the indicator lights LA, LB and LC are three indicator lights of different colors.
[0008] A further improvement of the technical solution of the utility model is that the color of the indicator light LA is red, the color of the indicator light LB is green, and the color of the indicator light LC is yellow.
[0009] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:
[0010] The utility model is a simple three-phase dual power switching device for monitoring different phases. The device has a simple structure and can automatically switch to the backup power supply when the main power supply fails. The switching is timely and can prevent the auxiliary air-conditioning equipment from failing to operate when the main power supply fails, causing the temperature in the machine room to rise too fast and threatening the safe operation of the equipment. The device does not require manual operation and saves manpower. At the same time, the device can automatically detect the two phases with wrong phase sequence through indicator lights. When the corresponding two-phase indicator lights are on, it proves that the two phases have wrong phase sequence. The two phases with wrong phase sequence can be found very accurately and the operator can be reminded to repair them in time. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a principle diagram of the utility model. DETAILED DESCRIPTION
[0012] The present invention is further described in detail below in conjunction with the embodiments:
[0013] like Figure 1 As shown, a simple three-phase dual power switching device for different phase monitoring includes a three-phase main power supply and a three-phase standby power supply, both of which have a voltage of 380 V. The three-phase main power supply is connected to the normally closed contact of the circuit breaker K1 and the contactor J1 in sequence, and then connected to the power supply of the computer room. The three-phase standby power supply is connected to the normally closed contact of the circuit breaker K2 and the contactor J2 in sequence, and then connected to the power supply of the computer room. The coil of the contactor J1 and the normally open contact of the contactor J2 are connected between the B phase and the C phase of the three-phase main power supply, and the coil of the contactor J2 and the normally open contact of the contactor J1 are connected between the B phase and the C phase of the three-phase standby power supply, so as to realize the linkage between the contactors J1 and J2.
[0014] When used, first close the circuit breaker K1, then the coil of contactor J1 is energized, the normally closed contact of contactor J1 is closed, and the main power supply is powered; at this time, the normally open contact of contactor J1 is opened, and then close the circuit breaker K2. Since the normally open contact of contactor J1 is open, it is a circuit breakers, then the coil of contactor J2 cannot be energized, the normally open contact of contactor J1 is closed, the normally closed contact is opened, and the standby circuit is a circuit breakers.
[0015] When the main power supply fails, the contactor J1 coil loses power, the normally closed contact of contactor J1 opens, and the normally open contact of contactor J1 closes. At this time, the contactor J2 coil is energized, the normally closed contact of contactor J2 closes, and the backup circuit is open to realize backup power supply.
[0016] A resistor RA1, an indicator light LA, and a resistor RA2 are sequentially connected between the main power supply phase A and the backup power supply phase A upstream of the circuit breakers K1 and K2, a resistor RB1, an indicator light LB, and a resistor RB2 are sequentially connected between the main power supply phase B and the backup power supply phase B, and a resistor RC1, an indicator light LC, and a resistor RC2 are sequentially connected between the main power supply phase C and the backup power supply phase C. The indicator lights LA, LB, and LC are three indicator lights of different colors. In this embodiment, the indicator light LA is red, the indicator light LB is green, and the indicator light LC is yellow.
[0017] When the upstream is under maintenance and a phase sequence error occurs between two phases, such as phase sequence error between phases B and C, current will be generated between phases B and C between the main power supply and the backup power supply, and the corresponding indicator lights LB and LC between phases B and C will light up, such as the green and yellow lights of the utility model, to remind the operator to carry out timely maintenance.
Claims
1. A simple three-phase dual power switching device for different phase monitoring, characterized in that: It includes a three-phase main power supply and a three-phase standby power supply. The three-phase main power supply is connected to the normally closed contacts of the circuit breaker K1 and the contactor J1 in sequence and then connected to the power supply of the computer room. The three-phase standby power supply is connected to the normally closed contacts of the circuit breaker K2 and the contactor J2 in sequence and then connected to the power supply of the computer room. The coil of the contactor J1 and the normally open contact of the contactor J2 are connected between the B phase and the C phase of the three-phase main power supply, and the coil of the contactor J2 and the normally open contact of the contactor J1 are connected between the B phase and the C phase of the three-phase standby power supply, so as to realize the linkage between the contactors J1 and J2. The resistor RA1, the indicator light LA and the resistor RA2 are connected in sequence between the main power supply phase A and the standby power supply phase A upstream of the circuit breakers K1 and K2, the resistor RB1, the indicator light LB and the resistor RB2 are connected in sequence between the main power supply phase B and the standby power supply phase B, and the resistor RC1, the indicator light LC and the resistor RC2 are connected in sequence between the main power supply phase C and the standby power supply phase C.
2. According to claim 1, a simple three-phase dual power supply switching device for different phase monitoring is characterized in that: The voltage of the three-phase main power supply and the three-phase backup power supply are both 380V.
3. According to claim 1, a simple three-phase dual power supply switching device for different phase monitoring is characterized in that: The indicator lights LA, LB and LC are three indicator lights of different colors.
4. A simple three-phase dual power supply switching device for different phase monitoring according to claim 3, characterized in that: The color of the indicator light LA is red, the color of the indicator light LB is green, and the color of the indicator light LC is yellow.