Accessory f. breaker 3WL guide frame size II 2500A 4-pole, rear vertical 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 R56= Mutual mech. interlocking only slide-in unit frame 2 m