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Short-time withstand current ($I_{\mathrm{ cw}}$ ) is a crucial parameter of air circuit breakers (ACBs) due to the selective protection. Considering the skin effect, the interphase effect, and the nonlinear $ {B}$ –$ {H}$ characteristics of ferromagnet, the 3-D transient finite-element method is adopted to analyze the short-circuit dynamic stability of a three-phase ACB. The transient current,...
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