accessory for breaker 3WL guide frame size I 1250-1600A design up to 66ka 4-pole, rear horizontal connection With 3 auxiliary plug connectors With SIGUT screw terminals With 3 change-over contacts, Operation 1 CO, Test 1 CO, Isolated position 1 CO With 2-piece shutter, can be locked P23= Retrofitted to connection: top horizontal, bottom vertical