THE COMPARISON OF TEST CIRCUITS WITH ARC MODELS

The are-circuit interaction plays an important role in the current int errupting process of High-Voltage Circuit Breakers. For the developmen t of circuit breakers, testing in the High Power Laboratory is necessa ry. For UW circuit breakers nem test circuits have to be developed. Th e design and development of nem synthetic circuits relies on computer simulations only. A correct representation of the current zero behavio r of the circuit breaker by means of an are model is absolutely necess ary. In this paper are modelling, and the development of new test circ uits are discussed and measurements of are voltage and are current are presented for two 72 kV SF6 power circuit breakers.