Automatic low-voltage circuit breaker closing device and automatic closing method by using device after no-voltage release

Abstract

The invention provides an automatic low-voltage circuit breaker closing device, and belongs to the field of reclosing devices. The device comprises a low-voltage circuit breaker which is provided with a time relay, wherein a sliding contact, a termination contact and a clock mechanism are arranged in the time relay; the sliding contact and the termination contact are located at two ends of a right-angle connecting rod and provided with corresponding static contacts respectively, and the sliding contact and the termination contact are driven by the clock mechanism; a No.1 port and a No.13 port of the time relay are connected among different leading-out terminals of a low voltage side of a transformer, a fuse protector and the low-voltage circuit breaker respectively; and a No.17 port and a No.3 port of the time relay are short-circuited, and a No.16 port and a No.4 port are connected with two ends of an electric closing button of the low-voltage circuit breaker in parallel. According to the device, manpower is saved, the closing is fast, the corporate image is better maintained, and the device is simple in structure and convenient and easy to implement.

Description

technical field [0001] The invention provides an automatic closing device for a low-voltage circuit breaker and a method for automatic closing after a voltage-loss trip and belongs to the field of reclosing devices. Background technique [0002] In order to ensure the safety and stability of the power grid operation and prevent the impact on the electrical equipment when the power grid resumes power supply, when the transformer is put into operation, according to the requirements of the "Power System Operating Regulations", all the loads carried by it need to be disconnected. All low-voltage circuit breakers have the function of voltage-loss tripping, that is, when the voltage is lower than a certain value of the rated voltage, the voltage-loss release in the low-voltage circuit breaker will trip the low-voltage circuit breaker. Close the low-voltage circuit breaker on site. If the low-voltage release in the low-voltage circuit breaker is removed, when the power supply volt...

AI Technical Summary

Problems solved by technology

If the low-voltage release in the low-voltage circuit breaker is removed, when the power supply voltage is too low, the electrical equipment will not work normally or even be damaged

[0003] At present, the defects of this technology are: firstly, when the power supply is restored, electric power operators need to go to the scene to close the switch, which requires a lot of manpower; secondly, the loss of voltage release cannot be removed, which makes it very long for the power grid to restore power supply; thirdly, When the power supply is restored, the power operators take a long time to switch on, resulting in more complaints and affecting the company's image

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