Detection method and device for shunt release

By designing detection methods and devices in the split-excitation tripper, calculating the coil resistance value and judging the status, the problem of insufficient tripping force and poor reliability at low voltage is solved, and a higher voltage application range and reliability are achieved, and a timely alarm is called, reducing the risk of circuit breaker application.

CN114252762BActive Publication Date: 2025-03-18ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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Patent Information

Application Number
CN202010999171.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-09-22
Publication Date
2025-03-18
Estimated Expiration
2040-09-22

AI Technical Summary

Technical Problem

The existing split-excitation tripper is insufficient when the external voltage is too low, resulting in long-term power-on burning, and poor single-coil design reliability, which affects the breaking action of the circuit breaker and may lead to serious accidents.

Method used

A detection method and device are designed to send a voltage pulse signal to the split-excitation tripper, receive the feedback current signal, calculate the coil resistance value, judge the current state, and feedback the status information according to preset standards.

Benefits of technology

Through the multi-coil redundancy design, the voltage application range of the split-excitation tripper and the reliability of the split-excitation operation are improved, the self-detection function is realized, the alarm is promptly, and the risk of circuit breaker application is reduced.

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Abstract

The present invention provides a detection method for a shunt release, wherein the shunt release has multiple sets of yokes, multiple sets of coils, multiple sets of static iron cores, and multiple sets of moving iron cores, and the method comprises: during the application of the shunt release, a voltage pulse signal is sent to the shunt release at a preset interval, and a feedback current signal is received; the coil resistance value of the current shunt release is calculated based on the voltage value of the voltage pulse signal and the current value of the feedback current signal; the coil resistance value is compared with the initial coil resistance value, and the current state of the shunt release is determined according to the shunt release state judgment standard, and the state information is fed back. The multi-coil redundant design of the shunt release of the present invention can increase the voltage application range of the shunt release and improve the reliability of the shunt action of the shunt release; and the shunt release of the present invention has a self-detection function, which can timely alarm the upper computer without affecting the normal use of the shunt release, greatly reducing the application risk of the circuit breaker.
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