A dual power supply control box with anti-misoperation function

Abstract

The invention discloses a double-power-supply control box with an anti-misoperation function. The control box comprises a box body, wherein a first input / output power supply wiring terminal, a second input / output power supply wiring terminal, a quadrupolar double-throw power supply switch, a third input / output power supply wiring terminal and a leakage protection circuit are arranged in the box body, wherein a standby power supply supplies power through the second input / output power supply wiring terminal and is electrically connected with an input end of the quadrupolar double-throw power supply switch; an outlet end of the quadrupolar double-throw power supply switch is electrically connected with the third input / output power supply wiring terminal through the leakage protection circuit and connected with power supply equipment through the third input / output power supply wiring terminal. Compared with the prior art, the double-power-supply control box with the anti-misoperation function has the advantages as follows: the control box is simple in structure, high in reliability and high in site durability, has a load switch-out protection function and can prevent potential risks caused by misoperation.

Description

technical field [0001] The invention relates to a power supply control box, in particular to a dual power supply control box with the function of preventing misoperation. Background technique [0002] The power system often encounters on-site power guarantee tasks for major government activities. In order to improve the reliability of power supply, the on-site electrical equipment adopts a two-way power supply mode, one for mains power supply of 380 / 220V, and the other for generator power , as a backup power supply; under normal circumstances, the on-site electrical equipment is powered by the mains power supply. Once the mains power supply is interrupted due to failure or other reasons, the power supply is switched to the generator power supply to continue power supply through the operation of dual power supplies. Due to the complex and irregular environment of on-site electrical equipment, the operation switching of dual power supplies has great potential safety hazards. I...

AI Technical Summary

Problems solved by technology

However, since the four-pole double-throw power switch does not have the arc extinguishing function, if there is a misoperation, when the power is switched under load, an arc short circuit will occur, which will easily cause personal and equipment damage.

[0004] However, the dual-power automatic switching devices available on the market have automatic functions and can switch power sources under load, but they cannot meet the simultaneous switching requirements of three-phase four-wire systems, nor do they meet the requirements of visible and obvious power disconnection points.

In addition, most of the equipment is installed in the low-voltage switchgear. As its auxiliary equipment, the secondary wiring is complicated, and it is electrically connected with the surrounding corresponding equipment, and the equipment is expensive. Therefore, this equipment cannot be used in the field environment

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