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The synchronization breaking technology which is leading in the vacuum circuit breaker has got general concern in electrical apparatus industry, and the dispersion of each single phase interrupter and operating mechanism parameters is one of the most important influencing factors. Based on this, a new structure with three-phase vacuum interrupter in the same chamber was proposed in this paper, and...
Using finite element simulation method to carry a comparative analysis of the repulsion mechanism and permanent magnetic mechanism, come to the conclusion that the repulsion mechanism has the advantage of rapidity;Aiming at the problem of high speed easy to cause instability, presenting a design of adding coil and repulsion chassis on the basis of the original repulsion mechanism, and optimizing the...
In order to improve the prediction accuracy of phase controlled switching operation time, restrain overvoltage and inrush current when the circuit breaker switched on, this paper establishs BP network prediction model based on voltage and ambient temperature as the main input parameters, and weights the uncertainty influence factors such as aging and wear. In order to improve the accuracy of prediction...
The small fault samples and single characteristic parameters in vacuum circuit breakers (VCBs) would lower the accuracy and reliability of mechanical fault diagnosis. In this paper, the problem has been solved with applying a fault diagnosis method based on particle swarm optimization (PSO) and least square support vector machine (LSSVM). By analyzing the close coil current (CC) of VCB, the eigenvalues...
In view of the requirement of high reliability and small disturbance in the condition of high-voltage (HV) vacuum circuit breaker (VCB), this paper puts forward a method of fault diagnosis based on online monitoring of vibration and acoustic signal. The research object is the 12kV indoor high-voltage vacuum circuit breakers and the system of fault diagnosis of the research object is built. This method...
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