Imaging detection method for insertion depth of opening and closing contacts for high-voltage circuit breakers

Abstract

The invention discloses a switching-closing brake contact insertion depth imaging detecting method for a high-voltage circuit breaker. The switching-closing brake contact insertion depth imaging detecting method comprises the following steps: (1) marking an imaging position region between a switching brake contact and a striking arc contact on a sleeve of a to-be-detected high-voltage circuit breaker; (2) under a closing state, performing X-ray imaging on the imaging position region by using a digitized ray imaging detecting system to obtain a detection image; (3) obtaining a breaking distance L between a closing brake contact and the striking arc contact in the detection image, judging whether the breaking distance L meets a design requirement of the to-be-detected high-voltage circuit breaker, if yes, judging whether the insertion depth of a switching-closing brake contact is qualified, and if not, judging whether the insertion depth of the switching-closing brake contact is not qualified. According to the switching-closing brake contact insertion imaging detecting method, the insertion situation of the switching-closing brake contact of the high-voltage circuit breaker can be quantitatively reflected, a structure inside the circuit breaker after closing, especially a relative position of a movable contact and a static contact inside the circuit breaker after closing, can be clearly displayed, and the defect caused by insufficient insertion depth of the switching-closing brake contact can be immediately found.

Description

technical field [0001] The invention relates to the technical field of detection and diagnosis of high-voltage circuit breakers, in particular to an imaging detection method for the insertion depth of opening and closing contacts of high-voltage circuit breakers. Background technique [0002] The high-voltage circuit breaker is an important electrical appliance in the circuit protection of high-voltage equipment. It connects and cuts off the normal load, overload, and short-circuit load in the power system. The combination of protection device and automatic device can quickly cut off the fault current to reduce the scope of power failure and prevent the expansion of accidents, which is of great significance to ensure the safe operation of the power system. Once the circuit breaker is delayed or malfunctions, the arc extinguishing time will be prolonged and the temperature will rise, which will cause serious damage to the equipment and even endanger the power grid. Since the...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: aiming at the problem that the insertion depth of the opening and closing contacts of the high-voltage circuit breaker is not in place, a digital radiography detection device is provided to detect the insertion depth of the opening and closing contacts of the high-voltage circuit breaker, which can quantitatively reflect The insertion of the opening and closing contacts of the circuit breaker can clearly display the internal structure of the circuit breaker after closing, especially the relative position of the internal dynamic and static contacts, and can timely detect the defects caused by the insufficient insertion depth of the opening and closing contacts. Imaging detection method for insertion depth of opening and closing contacts of high voltage circuit breakers

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