| 摘要 |
PURPOSE:To see that an auxiliary circuit can not be disconnected in the condi tion that a drawer switch is accommodated, that the auxiliary circuit can be connected or disconnected in condition that the drawer switch is pulled out, and that the drawer switch can not be accommodated when it is not connected. CONSTITUTION:A drawer switch 17 is provided with a fixed contactor 16 connected to the auxiliary circuit 8 to perform switching operation. A disconnection contactor 14, which electrically connects or disconnects the auxiliary circuit 8, connecting or disconnecting with the fixed contactor 16, is provided so that it may not be disconnected with the fixed contactor 16, in condition that the drawer switch 17 is accommodated in an accommodation frame 2. Moreover, a mobile metal fitting 10, which is erected when connected and does not project from the drawer ' switch 17 to allow the drawer switch to be accommodated in the accommodation frame 2 and falls down horizontally when disconnected and projects from the drawer switch 17 to disable the drawer switch 17 from being accommodated in the accommodation frame 2, is arranged in the vicinity of the fixed contactor 16 so that the bottom can be rotate. |
