Withdrawable circuit breaker without cradle, UL1066/IEC60947-2, FS 1, 4-poles, N-pole left, In=1000A up to 508V AC 50/60Hz, breaking capacity N, 50kA at 508V AC, Trip unit ETU300 LSI optimized for standard applica- tions, without display Protection LT, ST, INST, include N-protection, (internal N-sensor available), incl. trip/bell alarm (1xCO),