Kinematic chain for transmission beween the control mechanism and the poles of an electric circuit breaker

摘要

The invention relates to a kinematic chain for transmission between the mechanism and the poles of an electric circuit breaker with moulded insulating casing. The sub-assembly 53 comprising a cage 56 for supporting the contact fingers 54 and one of the connection regions 60 of each pole is made integral with the insulating partition 20 of the intermediate case 14 by means of a fixing device with clip 65 and screw 64, integral with the region 60. The cage 56 is mounted pivotably on a pin 104 positioned in bearings of the region 60, and is linked to the switching bar 33 through a mechanical link 68 cooperating with a disengageable coupling member 114 capable of interrupting the kinematic chain with the bar 33 in the vicinity of each pole. <IMAGE>