Device and method for off-line testing of LF refining 35kV high-voltage circuit breaker

Abstract

The invention discloses a device for off-line testing of an LF refining 35kV high-voltage circuit breaker, which comprises a control box, and a control module, an indication module and an output module which are installed in the control box. The control module is provided with a closing button and an opening button, the closing button and the opening button are connected with an opening coil and a closing coil of the 35kV high-voltage circuit breaker through the output module, so as to control opening and closing of the 35kV high-voltage circuit breaker; the indication module is provided with an opening indication lamp, a closing indication lamp and a three-phase closing indication lamp, and is used for displaying the working state of the 35kV high-voltage circuit breaker and detecting the contact closing condition of the 35kV high-voltage circuit breaker in the closing state; the output module is provided with a connecting line and a connector assembly and is used for connecting the testing device and the 35kV high-voltage circuit breaker; lF refining continuous production time is prolonged, and maintenance safety of electrical maintenance personnel is effectively guaranteed; the potential fault hidden danger of the LF refining 35kV high-voltage circuit breaker can be detected in time; and complete functions of the high-voltage circuit breaker before on-line use are ensured.

Description

technical field [0001] The invention belongs to the technical field of refining furnaces, and in particular relates to an off-line testing device and method for a 35kV high-voltage circuit breaker in LF refining. Background technique [0002] The LF refining furnace of the steelmaking plant is powered by a 35kV high-voltage cabinet. The 35kV high-voltage circuit breaker that disconnects or connects the power supply of the refining furnace transformer has an average of 8-10 times of hydration and opening for each furnace of steel smelted. The 35kV high-voltage circuit breaker mechanism is frequently closed. The mechanical impact is severe during opening, and the failure rate is high. Offline maintenance is often required. In addition, the 35kV high-voltage circuit breaker after offline maintenance cannot judge whether it meets the requirements for online use. [0003] Therefore, there is a need for an off-line testing device and method for LF refining 35kV high-voltage circui...

AI Technical Summary

Problems solved by technology

[0002] The LF refining furnace of the steelmaking plant is powered by a 35kV high-voltage cabinet. The 35kV high-voltage circuit breaker that disconnects or connects the power supply of the refining furnace transformer has an average of 8-10 times of hydration and opening for each furnace of steel smelted. The 35kV high-voltage circuit breaker mechanism is frequently closed. The mechanical impact is severe when the switch is opened, and the failure rate is high. Offline maintenance is often required. In addition, the 35kV high-voltage circuit breaker after offline maintenance cannot judge whether it meets the requirements for online use.

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