Switch-on and switch-off mechanism of automatic transfer switching equipment

Abstract

The invention relates to a switch-on and switch-off mechanism of automatic transfer switching equipment. The switch-on and switch-off mechanism is composed of fixed contact assemblies, moving contact assemblies and a square shaft assembly. According to the switch-on and switch-off mechanism, the moving contact assemblies are driven through rotation of the square shaft assembly to complete switch-on and switch-off with the fixed contact assemblies. Each fixed contact assembly mainly comprises an arc striking sheet, an AB power supply wiring board, an arc striking contact wiring board, a torsion spring, a torsion spring shaft, a silver alloy main contact of the fixed contact assembly, an arc isolating sheet, a silver alloy arc striking contact of the fixed contact assembly, a support and annealed copper strand wires, wherein the arc striking sheet is fixed to the AB power supply wiring board through bolts, the arc striking contact wiring board is located below the arc striking sheet and makes elastic contact with the torsion spring, and the torsion spring shaft is sleeved with the torsion spring and fixed to the support. According to the switch-on and switch-off mechanism of the automatic transfer switching equipment, the silver alloy arc striking contacts of the fixed contact assemblies are designed to be of a floating structure, bounce in the switch-on process is eliminated through the arc striking sheets and the silver alloy main contacts of the fixed contact assemblies, the arc extinguishing function is enhanced, and the ablation speed of silver alloy of the moving contact assemblies and the fixed contact assemblies is reduced.

Description

technical field [0001] The invention belongs to the field of electromechanical manufacturing, and in particular relates to an opening and closing mechanism of an automatic transfer switch appliance. Background technique [0002] The dynamic and static contacts of the automatic transfer switch are the key components of the entire product, but due to the rapid electrical wear of the silver alloy static contacts during use, the service life of the static contact components is greatly shortened, which not only increases the cost , which reduces the efficiency of use. Contents of the invention [0003] In order to improve the contact life of the static contact assembly structure of automatic transfer switch appliances, it is necessary to reduce the electrical wear speed of silver alloy contacts. The invention provides a new type of opening and closing mechanism for automatic transfer switch appliances. The ablation speed of silver alloy of small dynamic and static contact co...

AI Technical Summary

Problems solved by technology

[0002] The dynamic and static contacts of the automatic transfer switch are the key components of the entire product, but due to the rapid electrical wear of the silver alloy static contacts during use, the service life of the static contact components is greatly shortened, which not only increases the cost , which reduces the efficiency

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