Assembly device of screw/nut type and electrical terminal for a circuit breaker using this device

摘要

The assembly device for terminals (4,4a,4b) of the circuit breaker, has each terminal constituted mainly by a metallic block (14) traversed by an elongated passage for a bar (10-12) of the circuit-breaker (D). The upper part has a threaded aperture for an Al or Cu bolt which ensures connection of one of the bars to the protected external circuit. At least part of the thread of the bolt and/or nut is covered with a composite metallic coating containing C particles. This lubricates the nut and bolt so that the torque necessary for tightening is reduced.