Abstract: The calculation principle and verification method of the short-circuit dynamic stability of the air circuit breaker contact system were expounded.The establishment of the contact bridge mathematical model was introduced.The finite element electromagnetic simulation analysis based on Ansys was carried out by using the contact bridge model.The simulation results were compared with the experimental results to verify the feasibility of the simulation method.The method of analyzing the short-circuit dynamic stability of the contact system can provide a reference for engineers to design the contact system.

Key words: contact system, short-circuit dynamic stability, finite element, electromagnetic simulation