RETAINING STRUCTURE FOR MAINTAINING FACTORY SETTINGS OF GANG-STYLE LINKAGE FOR HIGH VOLTAGE DEAD TANK BREAKER WHILE MECHANISM IS REMOVED

摘要

Linkage structure (27) is connected between an operating mechanism (29) and an actuating assembly 25b of a circuit breaker for opening and closing an electrical contact of a pole assembly 12b. The linkage assembly includes a lever 32 to connect with the actuating assembly. A connection rod 30 is coupled to one end of the lever and to a close spring (39) for closing the electrical contact. A spring structure 40 is coupled to another end of the lever and includes an open spring (46) for opening the electrical contact. The open spring places the connection rod in tension. Retaining structure 48, associated with the lever and the spring structure, ensures that the spring force of the open spring is directed to the retaining structure so that tension on the connection rod is removed, enabling the connection rod to be serviced. The retaining structure includes an engaging member 50 associated at one end 52 with a threaded screw 54 and nut 55. The engaging member fits over a connection pin 60 connecting the link 44 of the spring structure to the lever 32.