On-line monitoring method for mechanical characteristics of whole set switch apparatus

Abstract

The invention relates to an on-line monitoring method of mechanical characteristics of a complete switch device. The on-line monitoring method comprises the following steps: an angular displacement sensor for detecting the rotating angle of a main shaft is arranged on the main shaft for controlling the opening and the closing of a high-voltage circuit breaker; a Hall current sensor is arranged on the opening and the closing control coils of the high-voltage circuit breaker; the angular displacement sensor and the Hall current sensor are connected with a central control unit; when the opening operation or the closing operation of the high-voltage circuit breaker is conducted, the central control unit is used for acquiring the output voltage of the angular displacement sensor and the output current of the opening and the closing coils, then calculating the average closing speed, the average opening speed, the closing time, the opening time, the effective current value of the closing coil and the effective current value of the opening coil, and finally comparing and judging by using the central control unit; and when one of the average closing speed, the average opening speed, the closing time, the opening time, the effective current value of the closing coil and the effective current value of the opening coil is beyond the prearranged scope, an alarm is given.

Description

technical field

[0001] The invention relates to an online monitoring method for the mechanical characteristics of a complete set of switchgear. Background technique

[0002] According to statistics, the most serious mechanical failures of circuit breakers are refusal to operate and malfunction. There are two main reasons for such failures. One is the mechanical failure of the operating mechanism and the transmission system, which is specifically manifested as mechanism jamming, component deformation, displacement and damage, loosening of the opening and closing iron core, and fracture of the shaft pin. tripping failure, etc.; another reason is caused by the failure of the electrical control and auxiliary circuits, which are manifested as poor contact of secondary wiring, wrong wiring, burning of the opening and closing coil due to mechanism jamming or poor transfer switch, and operating power supply, closing Brake contactor, micro switch failure and other faults.

[0003] ...

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