| 摘要 |
<p>A control center comprises a unit chamber having a panel having an opening at its front for containing a plurality of long control units in multiple stages and multiple rows in the depth direction in such a manner that the control units can be drawn forward. The unit chamber has at its back a main circuit connection block for connecting main circuits of the control units to an external main circuit. Each of the control units has a main circuit connector for connecting its main circuit to the external main circuit and a control circuit connector for connecting a control circuit to an external circuit. The control circuit connector arranged at the back of the control unit is arranged in such a manner that it can be moved forward and backward with respect to the control unit and at a test position where the main circuit connector and the control circuit connector are moved by a predetermined distance forward from the connection position where they are connected to the external main circuit and to the external circuit, the main circuit connector is disconnected from the external main circuit while the control circuit connector remains connected to the external circuit.</p> |
