Power switch cabinet

Abstract

The invention belongs to the field of switch cabinets, and particularly discloses a power switch cabinet which comprises a cable compartment, a bus compartment, a circuit breaker compartment and a control compartment. A bus copper bar, an inlet wire contact box, an outlet wire contact box and a current transformer are arranged in the bus compartment. A first handcart and a circuit breaker are arranged in the circuit breaker compartment, the first handcart is assembled with the circuit breaker compartment through a first guide rail, the circuit breaker is fixed on the first handcart, an inlet wire contact of the circuit breaker is matched with the inlet wire contact box, and an outlet wire contact of the circuit breaker is matched with the outlet wire contact box. An opening and closing mechanism is arranged in the circuit breaker, and the opening and closing mechanism is composed of an elastic blocking device, an electromagnetic driver, an insulating cylinder and a vacuum bubble whichare fixedly connected in the axial direction. A controller is arranged in the control compartment and electrically connected with the electromagnetic driver and the current transformer. The elastic blocking device absorbs part of energy of the opening and closing mechanism before closing, inhibits closing bounce of the moving contact of the circuit breaker, avoids closing bounce arcing and explosion caused by arcing, and improves closing performance and safety of the switch cabinet.

Description

technical field [0001] The invention relates to a switchgear, in particular to a power switchgear suitable for reducing closing arcing, and belongs to the field of electric equipment. Background technique [0002] Switch cabinets are widely used in power plants, petroleum, chemical industry, metallurgy, textiles, high-rise buildings and other industries for power transmission, power distribution and power conversion. The switch cabinet is built with a circuit breaker for controlling the primary circuit on and off. During the application process of the switchgear, the circuit breaker often bounces on closing, which causes arcing between the moving contact and the static contact of the circuit breaker, that is, the bouncing and arcing on closing, and the arc ablation makes the moving contact of the circuit breaker, The static contacts are easily damaged, resulting in a short service life of the circuit breaker, requiring a lot of manpower and material resources to maintain th...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a power switchgear to solve the technical problem that the power switchgear in the prior art is prone to closing bounce and arcing when closing the switch. Inhibit the closing bounce of the moving contact of the circuit breaker, reduce the occurrence of closing bounce arcing, and improve the closing performance and safety of the switchgear

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