Breaker control circuit design method capable of realizing bidirectional supervision function for control circuit of breaker

A technology of control loop and design method, applied in the direction of protection switch operation/release mechanism, etc., can solve the problems of reducing the reliability of user power supply, the circuit breaker cannot be closed normally, the hidden danger of power grid operation stability, etc., and achieve the effect of increasing the conversion time.

CN105702533AActive Publication Date: 2016-06-22MAINTENANCE BRANCH OF STATE GRID HEBEI ELECTRIC POWER
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-06-22

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Abstract

The present invention relates to the technical field of circuit breakers and particularly relates to a breaker control circuit design method capable of realizing the bidirectional supervision function for the control circuit of a breaker. According to the technical scheme of the invention, the auxiliary contact 52b of a breaker switch-on control circuit is connected in parallel with a time-delay contact 52A. The auxiliary contact 52a of a breaker switch-off control circuit is connected in parallel with a time-delay contact 52B. In this way, no matter the breaker is in the switch-on state or in the switch-off state, the monitoring function of the breaker switch-off control circuit and the monitoring function of the breaker switch-on control circuit are realized at the same time.
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Description

technical field

[0001] The invention relates to the technical field of circuit breakers, in particular to a circuit breaker control loop design method capable of realizing bidirectional monitoring of the circuit breaker control loop. Background technique

[0002] Current design methods for circuit breaker control loops (such as figure 1 shown), the basic principle is that during the closing operation of the circuit breaker, the integrity of the two sets of trip circuits of the circuit breaker can be monitored through the intermediate HWJ relay, and the integrity of the closing circuit cannot be monitored at this time; during the opening period of the circuit breaker, through the intermediate The relay TWJ monitors the integrity of its closing circuit, and cannot monitor the integrity of the tripping circuit at this time. From the point of view of actual operation, during the closing operation of the circuit breaker, the defect of recessive closing control circuit disconnect...

Examples

Embodiment Construction

[0038] The present invention will be further described below in conjunction with accompanying drawing.

[0039] Such as figure 2 As shown, the circuit breaker auxiliary contact transfer device of the embodiment includes a circuit breaker auxiliary transfer switch 1 , a spring 2 and a transmission link 3 . One end of the transmission connecting rod 3 is externally connected to the main contact drive shaft of the circuit breaker, the other end of the transmission connecting rod 3 is connected to one end of the spring 2, and one end of the spring 2 is connected to the contact of the auxiliary transfer switch 1 of the circuit breaker. Under the action of the transmission link 3, the spring 2 drives the contact of the auxiliary transfer switch 1 of the circuit breaker to the end point for 50ms to 5s. The circuit breaker auxiliary contact switching device is different from the traditional mechanical linkage to drive the circuit breaker auxiliary switching device. The circuit break...