The ACB E4.2N is a 4000 A, 4P circuit breaker with a withdrawable feature. It has a breaking capacity of 66 kA. The nominal current (In) is 4000 A. The long-time delay range (L-I1) is from 1600 A to 4000 A. The short-time delay range (S-I2) is from 2400 A to 40000 A. The instantaneous delay range (I-I3) is from 6000 A to 60000 A. The ground fault delay range (G-I4) is from 400 A to 4000 A. It comes with an auto EKIP Touch LSIG trip unit and HR-HR terminal complete with WMP+FP functionality.