SOLUTION OF SOME ELECTRICAL DEVICES PROBLEMS BY SIMULATION METHODS

Ľudovít Hüttner

   In the last years, computer simulation has reached a significant position in the investigation and development of technical products. Simulation programmes and computer utilization have found application also in the area of electrical devices. At our workplace we have used simulation programmes for many years to investigate transient phenomena mainly at short-circuit current breaking in miniature circuit breakers (MCB), short faults and forming of surge waves for testing circuit. Computer programmes allow solving difficult tasks of thermal, magnetic and electrical fields, and tasks of mechanical stresses. In the contribution, mainly solutions of some problems in MCB and contactors are presented.

Keywords: short-circuit current breaking, Joule integral, electric arc, thermal stress, magnetic field, dynamical force

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