electromagnetic circuit breaker, compact structure, and small volume, high breaking capacity, and a short arcing distance. electromagnetic circuit breaker Rated current of frame size lnm(A)800Type KWN-800CKWN-800SKWN-800GRated current ln(A)400, 500, 630,700,800Number of poles343434Rated insulation voltage Ui (V)AC690Rated operating voltage Ue (V)AC400Rated impulse withstand voltage Uimp (V) ...