SF6 circuit breaker low-pressure automatic disconnecting operating power supply device

Abstract

The invention provides a SF6 circuit breaker low-pressure automatic disconnecting operating power supply device. A device power supply is connected to a SF6 pressure gauge, a microprocessor, and a controlled switch through wires. The SF6 pressure gauge, the microprocessor, and the controlled device are successively connected through signal lines. An operating circuit power supply, the controlled switch, and a circuit breaker operating circuit are successively connected through operating circuit wires. The SF6 circuit breaker low-pressure automatic disconnecting operating power supply device automatically disconnects the SF6 circuit breaker operating power supply when the SF6 pressure in the SF6 circuit breaker is lower than a blocking value so as to save manpower, is able to disconnect theSF6 circuit breaker operating power supply in time, and is novel and practical in design.

Description

technical field [0001] The invention relates to an automatic device, in particular to a device for automatically disconnecting an operating power supply when the air pressure is low for an SF6 circuit breaker. Background technique [0002] In power grid operation, SF6 circuit breaker is a circuit breaker that uses sulfur hexafluoride (SF6) gas as arc extinguishing medium and insulating medium. When the SF6 pressure of the SF6 circuit breaker is lower than the blocking value, the dielectric strength and arc extinguishing ability of the SF6 circuit breaker will decrease, which poses a serious threat to the safe operation of the equipment. [0003] Circuit breaker operating circuit, also known as circuit breaker control circuit, its function is to open and close the circuit breaker through the secondary circuit. When the SF6 pressure is lower than the blocking value, according to the "State Grid Corporation of Power Substation Operation and Maintenance Management Regulations" ...

AI Technical Summary

Problems solved by technology

[0004] At present, when the SF6 pressure of the SF6 circuit breaker is lower than the blocking value, the power supply company sends substation operation and maintenance personnel to the site to disconnect the operating power of the SF6 circuit breaker, which consumes a lot of manpower and travel time to the substation. Turn on the SF6 circuit breaker to operate the power supply

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