Electrical SF6 circuit-breaker electrified intelligent gas supplement unit and gas supplement method

Abstract

The invention relates to an electrical SF6 circuit-breaker electrified intelligent gas supplement unit and a gas supplement method. The unit comprises a gas cylinder storing gas SF6, a three-way connection pipe and a gas supplement connection pipe. The outlet of the gas cylinder is provided with a pressure reducing valve. The main pipe of the three-way connection pipe is connected with the pressure reducing valve by virtue of a gas supplement electromagnetic valve. One branch pipe of the three-way connection pipe is provided with a pressure sensor, an electro connecting pressure gauge and a safety valve, and is connected with the gas supplement connection pipe by virtue of a gas supplement valve. The other end of the gas supplement connection pipe is connected with an inflation / deflation valve of the electrical SF6 circuit breaker which is in operation and is subjected to gas supplement. The other branch pipe of the three-way connection pipe is provided with a shunt valve. The gas supplement electromagnetic valve and the pressure sensor are electrically connected to a control module, the gas supplement electromagnetic valve is electrically connected to the electro connecting pressure gauge, and the electro connecting pressure gauge is electrically connected with an alarm. The defects of a conventional gas supplement device are avoided, and safe, reliable, efficient, accurate, economical and environment-friendly electrified gas supplement work can be realized.

Description

technical field [0001] The invention relates to a live intelligent gas supply device and a gas supply method for an electric SF6 circuit breaker. Background technique [0002] When the SF6 gas pressure inside the SF6 circuit breaker in operation is reduced to a certain level, serious accidents will occur during opening and closing operations due to insufficient insulation and arc extinguishing capabilities, and even cause serious consequences of switch explosion. When the internal SF6 gas pressure of the electric SF6 circuit breaker is insufficient, the gas should be replenished in time. The traditional gas supply method of electric SF6 circuit breaker is mostly manual operation of the gas filling valve, which cannot perform smooth and soothing gas supply according to the SF6 gas pressure inside the SF6 circuit breaker. During the gas supply process, the gas supply pressure may be too high due to the negligence of the staff. It causes the impact of the air flow in the SF6 p...

AI Technical Summary

Problems solved by technology

Due to manual control, sometimes excessive gas filling occurs, and then the excess SF6 gas is directly emptied into the atmosphere, resulting in waste and environmental pollution (SF6 gas for electricity is expensive, and evacuation will destroy the ozone layer, and the SF6 gas is passed through the arc extinguishing in the switch Some decomposition products are highly toxic)

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