High repulsive force value between contact members arising mostly at contact closure and/or in transient under short circuit conditions is particularly onerous for power switch applications. It results in either contact floating or bouncing which are associated with an electric arc and following contact welding. This problem is of great importance for any circuit breaker. To avoid the contact floating at closure and during any inrush current under short circuit conditions, a special compensation system, which employs an electromagnetic effect of the contact load itself, has been developed. However to select and design the compensation system properly its efficiency has to be known. In the paper a parametric design idea was introduced, and a parametric finite element model of an approach the electrodynamic force value depending on parameters of different shaped copper plates used in the compensation unit was established using batch program language APDL of ANSYS. Curve-fitting be given according to the calculating results, the optimization designing of compensation unit is based on it. Besides, a visualized finite element simulation software was developed based on VB programming platform and it can be easily embedded in the compensation system design parameter, therefore, It avoided the great deal repetition of the conventional FEM design process and provided the engineers with new track and method to design and analyze structures in future.
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