fixed-mounted circuit breaker approved to UL489 3-pole, BG I, In=1600A AC 50/60 Hz, IEC: to 690V, 65kA at 440V ul: to 600y/ 347, 65kA at 480V frnt.conn. top/bot. dual-hole Overcurrent release ETU 25 LSI protection adjustable 0.4-1 in With manual operating mechanism with storage with electrical + mechanical request 50/60 Hz 110 V AC, 110 V DC without 1st auxiliary release With 2nd auxiliary release "R", F3 Undervoltage, instant. 24 V DC 5NO+3NC