GIS three-phase common box type maintenance grounding switch casing

Abstract

The invention relates to a GIS three-phase common box type maintenance grounding switch casing. According to the casing, the structure of a mechanism chamber is designed to be a cuboid structure instead of a circular column structure in the prior art to reduce weight, the volume and the core space volume of the casing; a grounding conductor mounting seat is designed to be a parallel structure instead of an equal triangle uniform structure in the prior art to adapt to the structure of the mechanism chamber; a switching operating mechanism employs a crank connecting rod sliding block mechanism instead of a dual-crank connecting rod mechanism in the prior art to guarantee motion precision of the switching operating mechanism; a voltage detector mounting seat is arranged in the mechanism chamber to prevent a voltage detector from being interfered, and precision of internal voltage detection signals is guaranteed; an arc observation port is arranged at an outer side of the mechanism chamberto monitor an internal arc state in real time, and internal arc faults can be avoided; an observation port is arranged at the outer side of the mechanism chamber corresponding to a grounding conductor, and the operating state of the switching operating mechanism is monitored in real time.

Description

technical field [0001] The invention relates to a grounding switch casing for GIS switchgear, in particular to a three-phase common box-type grounding switch casing for maintenance. Background technique [0002] GIS is a gas-insulated metal fully-enclosed combined switchgear. GIS is mainly composed of circuit breakers, transformers, lightning arresters, isolating switches, grounding switches, busbars, and outlet terminals. It has the advantages of compact structure, high reliability, and convenient installation. It is widely used. It is used in the fields of high voltage, ultra-high voltage and ultra-high voltage. The grounding switch is installed next to the isolating switches on both sides of the circuit breaker, and it plays the role of grounding on both sides of the circuit breaker to protect the safety of the working area when the circuit breaker is overhauled. [0003] The earthing switch housing is connected and sealed with the isolating switch housing, so as to be i...

AI Technical Summary

Problems solved by technology

The grounding conductor mounting bases X51-53 are arranged in an equi-triangular uniform structure, so that the mechanism room X21 must adopt a cylindrical shape structure, which makes the shell bulky and heavy, and the gas consumption of SF6 is large; it observes the internal arc and the opening and closing operating mechanism Both are implemented through the open flange X41, but it must be shut down for inspection during maintenance, and the situation inside the shell cannot be monitored in real time; the opening and closing operating mechanism adopts a double crank linkage mechanism, and the operation of the grounding conductor is not guided, and the opening and closing The movement accuracy is low, which cannot effectively guarantee the safety of people and equipment; the voltage detector is installed outside the mechanism room, and the detection voltage signal is easily affected by the external environment, which brings difficulties to internal voltage analysis

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