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Computer simulation of high-voltage SF6 circuit breakers: approach to modeling and application results

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3 Author(s)
Ahmethodzic, A. ; Fac. for Electr. Eng., Univ. Sarajevo, Sarajevo, Bosnia-Herzegovina ; Kapetanovic, M. ; Gajic, Z.

Nowadays, computer simulation of processes during current interruption is widely used in design optimization of HV circuit breakers. A simplified physical enthalpy flow arc models provide possibility to get relatively simple, and easy to use, simulation software for HV SF6 circuit breakers. Such software has been developed and successfully used in development of various SF6 circuit breakers, based on classical puffer and puffer assisted self-compensated principle. General outline of the computer program, as well as some simulation results and their experimental verification obtained on a real 245 kV SF6 circuit breaker, are presented. The interrupter is based on puffer assisted selfcompensated principle where arc energy is used to partly compensate compression forces during high current interruptions. It additionally uses a double speed contact stroke created by a simple mechanism placed below the moving contact.

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Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:18 ,  Issue: 4 )