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The paper investigates the pulsed AMF arc control on the vacuum arc and the post arc characteristic to reveal the mechanism of AMF arc control in different control time and find the proper AMF arc control. The pulsed AMF control system is designed and the pulse width is adjusting from 1.5ms to 10ms. The test circuit is set up in the synthetic test and the test VI is transparency in order to observe...
This paper proposes the equivalent circuit of dynamic VD (PVD) in multi-break vacuum circuit breakers (VCBs). The equivalent circuit is composed of controlled post-arc sources, post arc resistors and equivalent capacitors. The PVD is divided into four processes: the initial transient recovery voltage (TRV) process, the oscillating TRV process, the stable TRV process and the power-frequency voltage...
This paper investigates the dynamic dielectric recovery synergy (DDRS) of hybrid circuit breakers (HCBs) with CO2 gas and vacuum gaps in series. The interaction between the vacuum arc and CO2 gas arc is simulated by the continuous transient arc model and Mayr arc model. The simulation results indicate that the extra methods, for example, dividing capacitors, are needed to obtain optimal DDRS of HCB...
The current interruption capacity of gas gap can be enhanced by series connecting with vacuum gap in hybrid circuit breaker. For the purpose of compensating the inferior interruption performance of CO2 gas gap, as the substitute for SF6 gas gap, the interruption principle and the dielectric strength recovery process of the series gaps of vacuum gap and CO2 gas gap are studied in this paper. Based...
CO2 gas is a possible substitute for SF6 gas in circuit breaker with relatively superior arc interruption performance. To enhance the interruption capacity of the circuit breaker which employs CO2 gas as its arc interruption dielectric, the interruption principle of the hybrid circuit breaker composed of vacuum interrupter and CO2 gas interrupter is studied. Based on the black-box arc models of hybrid...
By series connected with vacuum circuit breaker, the relatively limited arc-interruption capacity of the gas circuit breaker, which employs CO2 gas as the substitution to SF6 gas, can be compensated to match with or approach to the interruption capacity of SF6 gas circuit breaker. To investigate and optimize the voltage distribution between vacuum gap and CO2 gas gap, the three dimension models of...
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