Internal fault arcing test device of composite apparatus

Abstract

The invention discloses an internal fault arcing test device of a combined electric appliance, and the device comprises a protective shell, wherein the left and right sides of the bottom of the protective shell are fixedly connected to the ground through supporting legs; a sample shell is arranged in the protective shell, and the lower end of the sample shell is fixedly connected to the protective shell through supporting plates on the left and right sides. The lower end of the sample shell is provided with an anti-explosion sheet device, and a plurality of insulating partition plates are arranged in the sample shell. By adopting the novel device, after fault current is introduced, the arc striking wire is instantly fused to form a short-circuit arc between the conductor device and the sample shell, and the air pressure in the air chamber is rapidly increased when the high temperature of the arc is in an extremely short time; before the shell of the test object is burnt through by an electric arc, the explosion-proof sheet device is exploded to release pressure, the explosion of the shell of the test object is prevented, a through-flow loop and an arc strike of a test fault current are reasonably designed, a test scheme is effectively provided, and an internal fault arcing test is successfully and safely completed.

Description

technical field [0001] The invention relates to the technical field of high-voltage switchgear, in particular to an internal fault arcing test device of a combined electrical appliance. Background technique [0002] Gas-insulated metal-enclosed switches, as important equipment in power systems, have been widely used in China. The enclosed combined electrical appliances use all primary equipment except transformers, such as circuit breakers, disconnectors, grounding switches, current transformers and other major equipment. Assembled in a closed metal shell, it has the advantages of small size, closed, free from external interference and stable performance. During the operation of the switchgear, high-voltage insulating gas is used inside, and the insulation performance is good, and the probability of arc fault is extremely high. Small. However, due to the influence of several factors, the occurrence of arc faults cannot be avoided. The energy of the fault arc is very large, ...

AI Technical Summary

Problems solved by technology

However, due to the influence of several factors, the occurrence of arc faults cannot be avoided. The energy of the fault arc is very large, and it is easy to increase the pressure of the internal high-voltage insulating gas instantaneously, which may easily cause arc burns or even explosion of the shell that burns through, which will cause personal injury or damage. damage to other equipment

[0003] At present, the internal fault arcing test device of the existing combined electrical equipment is often unable to verify the strength of the test product shell and the reaction speed of the explosion-proof disk device. Therefore, the present invention provides an internal fault arcing test device of the combined electrical device. solve the problems raised above

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