Fast transients overvoltages produced by switching distribution transformers with a vacuum circuit breaker: simulation and testing

• Cold withstand voltage characteristic of the VCB, • HF quenching capability, • Chopping current. The cold withstand voltage characteristic of the VCB is a function of the contact distance. One of the parameters that is of influence, is the speed of contact separation and many researchers have investigated the withstand capability by experiments [4]. It is known that the data vary with a statistical distribution. Smeets [5] represented the withstand