withdrawable circuit breaker approved to UL489 with guide frame 4-pole, BG II, In=2500A AC 50/60 Hz, IEC: to 690V, 100kA at 440V ul: to 600V, 100kA at 480V rear connection horizontal 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 24-30 V DC Activation 24 V DC With 1st auxiliary release Shunt release "F", F1 24 V DC; 100% ON period without 2nd auxiliary release 4NO+4NC A61= Special packaging for increased transport requirements, for foam packaging carton packaging with wax coating (moisture protection) R21= Shutter 2-part can be locked with bracket lock