Circuit breaker contact status fault diagnosis tester

Abstract

The invention discloses a circuit breaker contact status fault diagnosis tester which comprises an energy supply CT, a sensor, an energy supply module, a signal converting and transmitting module, a data merging and processing device and an industrial personal computer, wherein the energy supply CT is used for inducing current from circuit breaker conductors and is connected with the energy supplymodule; the energy supply module is connected with the signal converting and transmitting module; the sensor is connected with the signal converting and transmitting module; the signal converting andtransmitting module is used for converting signals output by the sensor into digital quantity and transmitting the digital quantity to the data merging and processing device in a wireless communication manner; the data merging and processing device is used for receiving data transmitted by the signal converting and transmitting module and transmitting the data to the industrial personal computer;and the industrial personal computer is used for realizing analytical processing of the signal, waveform display and data storage. According to the circuit breaker contact status fault diagnosis tester disclosed by the invention, a high-frequency component of a fault signal can be accurately captured, and the circuit breaker contact fault is identified, so that fault diagnosis is effectively performed.

Description

technical field [0001] The invention is a circuit breaker contact state fault diagnosis instrument, which is used for real-time monitoring of the state of the dynamic and static contacts of the circuit breaker. [0002] Test to determine whether the circuit breaker contacts have ablation, poor contact and other fault conditions, and provide data support for circuit breaker fault monitoring and maintenance. Background technique [0003] As one of the key equipment in the substation, the circuit breaker's performance determines the safe and stable operation of the power system. Therefore, it is very important to monitor the working status of the circuit breaker in real time. Among them, the monitoring of the dynamic and static contacts of the circuit breaker is conducive to timely discovery of the real-time performance of the circuit breaker contacts. Since the moving contacts of the circuit breaker are often in action, and the high voltage and high current carried on them w...

AI Technical Summary

Problems solved by technology

[0005] The above patents mainly judge the working state of the circuit breaker based on the vibration signal when the circuit breaker operates. However, for electrical faults such as poor contact of the internal contacts of the circuit breaker, contact burnout, etc., since there is no obvious mechanical vibration phenomenon, fault diagnosis cannot be carried out.

Chinese patent "CN105242199A" and Chinese patent "CN105974304A" disclose the fault diagnosis method of the opening and closing coil of the circuit breaker, but they only judge the working state of the opening and closing coil to determine whether the circuit breaker is effectively opened or closed. Head failure, etc. cannot be effectively monitored and judged

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