CN203301227U - Uninterrupted power supply (UPS) automatic switching device - Google Patents

Abstract

The utility model provides an automatic switching device for UPS power supply, which is characterized in that: the device includes an AC overvoltage relay, an AC contactor and an air switch; the first AC contactor, the second AC contactor and the second AC overvoltage relay pass through The AC small busbar is connected in series to form a branch circuit, and the branch circuit is connected in parallel with the first AC overvoltage relay to form the first unit; the fourth AC contactor, the third AC contactor and the fourth AC overvoltage relay are connected in series through the AC small busbar to form a branch circuit , the branch is connected in parallel with the third AC overvoltage relay to form a second unit; the first unit is connected between the first AC power supply and the cable, and the second unit is connected between the second AC power supply and the cable. The device is simple, practical, and reliable in operation, and can be used not only for automatic switching between two AC power sources, but also for workplaces that require automatic switching between two DC power sources and mutual automatic switching between AC and DC power sources.

Description

A UPS power supply automatic switching device

technical field

The utility model relates to a device capable of realizing reliable and automatic switching of two-way power sources in the process of safe power supply.

Background technique

There are 5 background monitoring machines in the 500kV substation, all of which are powered by UPS1 power supply. If the UPS1 power supply fails, the 5 background monitoring machines will lose power and cannot work, which will cause serious consequences such as the inability to monitor the status of the equipment in the substation and the inability to perform switching operations.

Contents of the invention

Purpose of the invention: The utility model provides an automatic switching device for UPS power supply, and its purpose is to solve the problem that the failure of the previous UPS1 power supply easily causes the equipment to fail to work normally.

Technical solution : the utility model is realized through the following technical solutions:

A UPS power supply automatic switching device is characterized in that: the device includes an AC overvoltage relay, an AC contactor and an air switch; the first AC contactor, the second AC contactor and the second AC overvoltage relay are connected in series through an AC small busbar A branch circuit is formed, and the branch circuit is connected in parallel with the first AC overvoltage relay to form the first unit; the fourth AC contactor, the third AC contactor and the fourth AC overvoltage relay are connected in series through the AC small bus to form a branch circuit, and the branch circuit The second unit is formed in parallel with the third AC overvoltage relay; the first unit is connected between the first AC power supply and the cable, and the second unit is connected between the second AC power supply and the cable.

The device also includes an air switch, which is arranged between the electric load and the cable.

A fifth AC contactor is also arranged between the first unit and the cable; a sixth AC contactor is also arranged between the second unit and the cable.

Advantages and effects :

The utility model provides an automatic switching device for UPS power supply, which comprises an AC overvoltage relay, an AC contactor and an air switch; the first AC contactor, the second AC contactor and the second AC overvoltage relay pass through the AC small bus A branch circuit is formed in series, and the branch circuit is connected in parallel with the first AC overvoltage relay to form the first unit; the fourth AC contactor, the third AC contactor and the fourth AC overvoltage relay are connected in series through the AC small bus to form a branch circuit. The circuit and the third AC overvoltage relay are connected in parallel to form a second unit; the first unit is connected between the first AC power supply and the cable, and the second unit is connected between the second AC power supply and the cable.

Compared with the existing situation, the utility model has the advantages of:

The device is simple, practical, and reliable in operation, and can be used not only for automatic switching between two AC power sources, but also for workplaces that require automatic switching between two DC power sources and mutual automatic switching between AC and DC power sources.

Description of drawings:

Fig. 1 is the structural representation of the utility model.

The specific embodiment: the utility model is further described below in conjunction with the accompanying drawings:

The utility model provides an automatic switching device for UPS power supply. The device includes an AC overvoltage relay, an AC contactor and an air switch; the first AC contactor 1C, the second AC contactor 2C and the second AC overvoltage relay 2YJ pass through The small busbars are connected in series to form a branch circuit, which is connected in parallel with the first AC overvoltage relay 1YJ to form the first unit 111; the fourth AC contactor 4C, the third AC contactor 3C and the fourth AC overvoltage relay 4YJ pass through the AC small busbar A branch circuit is formed in series, and the branch circuit is connected in parallel with the third AC overvoltage relay 3YJ to form the second unit 222; the first unit 111 is connected between the first AC power supply UPS1 and the cable, and the second unit 222 is connected to the second AC power supply Between UPS2 and cables.

The device also includes an air switch C65NC40, and the air switch C65NC40 is arranged between the electric load and the cable.

A fifth AC contactor 5C is also provided between the first unit 111 and the cable; a sixth AC contactor 6C is also provided between the second unit 222 and the cable.

In order to ensure reliable automatic switching, the device adopts mutual locking between 5C and 6C, C65NC40 air switch supplies power to the load, and UPS1 and UPS2 are two external AC power sources.

In the utility model, the first AC power supply UPS1 is connected to the device as a working power supply, and the second AC power supply UPS2 is connected to the device as a backup power supply; the two UPS power circuits are used to judge whether the power supply is faulty or not through the voltage relays in their respective units ; The two UPS power circuits are used for automatic switching power supply through the AC contactors in their respective units; the automatic air switch is connected to supply power to 5 background monitoring machines, that is, the electrical load.

The utility model is a two-way UPS power supply automatic switching device with simple wiring and reliable operation. Normally, the first AC power supply UPS1 supplies power to 5 background monitoring machines through the device, and the second AC power supply UPS2 is standby. If the first AC power supply If UPS1 fails, the device will automatically switch to the second AC power supply UPS2 to supply power to the 5 background monitoring machines, ensuring that the normal operation of the 5 monitoring machines will not be affected.

Claims (3)

1. ups power automatic switching control equipment, it is characterized in that: this device comprises AC overvoltage relay, A.C. contactor and air switch; The first A.C. contactor (1C), the second A.C. contactor (2C) and the second AC overvoltage relay (2YJ) form branch road, this branch road and the first AC overvoltage relay (1YJ) formation in parallel first module (111) by exchanging little bus series connection; The 4th A.C. contactor (4C), the 3rd A.C. contactor (3C) and the 4th AC overvoltage relay (4YJ) form branch road, this branch road and the 3rd AC overvoltage relay (3YJ) formation in parallel second unit (222) by exchanging little bus series connection; First module (111) is connected between the first AC power (UPS1) and cable, and second unit (222) is connected between the second AC power (UPS2) and cable.

2. a kind of ups power automatic switching control equipment according to claim 1, it is characterized in that: this device also comprises air switch (C65NC40), air switch (C65NC40) is arranged between power load and cable.

3. a kind of ups power automatic switching control equipment according to claim 1, is characterized in that: between first module (111) and cable, also be provided with the 5th A.C. contactor (5C); Between second unit (222) and cable, also be provided with the 6th A.C. contactor (6C).

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