fixed-mounted circuit breaker approved to UL489 3-pole, BG II, In=2000A AC 50/60 Hz, IEC: to 690V, 100kA at 440V ul: to 600V, 100kA at 480V frnt.conn. top/bot. dual-hole Overcurrent release ETU 45 LSIN protection adjustable 0.4-1 in with 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 without 1st auxiliary release With 2nd auxiliary release "R", F3 Undervoltage, instant. 110-127 V AC, 110-125 V DC 2NO+2NC A61= Special packaging for increased transport requirements, for foam packaging carton packaging with wax coating (moisture protection)