| 摘要 |
The contact plates to be applied on concentric contact rings comprise partly male contacts consisting of an earth protection plate, control parts, a negative plate, phase plates and two concentric contact rings, and partly female contacts comprising contact rings which are concentric, an earth protection plate, phase plates and a negative plate. The contacts with established electrical contact have contact in protective earth in a first stage and thereafter on rotation have contact in the negative conduit and in the phase conductors. The contact plates for phase and negative conductors are protected against contact. On being turned into the stop position, the contacts are locked with a control pin and a track. If required, a light diode can be fitted in the pin to show that the contact is under voltage. |
