| 摘要 |
In an earth continuity checking system of a mains power supply, a transmitter (4) located at the fuse box or point of known good earth injects signals onto the earth and neutral wires (3, 2) or earth and live wires (3, 1) and receivers (5) are situated at points where earth continuity is to be checked. The receivers can be fixed or mobile installations and can be used to continuously monitor the earth line and to disconnect live and neutral via an isolator (6) in the event of loss of earth continuity. Loss of neutral continuity and short circuit neutral to earth are also checked with this system. <IMAGE> |
