fixed-mounted circuit breaker approved to UL489 4-pole, BG II, In=2000A AC 50/60 Hz, IEC: to 690V, 100kA at 440V ul: to 600V, 100kA at 480V rear connection horizontal Overcurrent release ETU45 LSIN protection adjustable 0.4-1 in with display and cubicle bus Opt.: Comm. /measuring func./ground fault/ ZSS Motorized/manual operating mechanism with spring charging motor AC 50/60 Hz 110-127 V AC or 110-125 V DC Activation 50/60 Hz 110 V AC, 110 V DC With 1st auxiliary release Shunt release "F", F1 50/60 Hz 110 V AC/110 V DC, 100% on-load factor without 2nd auxiliary release 4NO+4NC A61= Special packaging for increased transport requirements, for foam packaging carton packaging with wax coating (moisture protection)