| 摘要 |
<p>Disclosed is an electrical protection device, control circuit and electrical system. In one aspect, the control circuit includes: at least two input terminals including a first and second terminal for electrically connecting with an active and neutral terminal of the supply; at least two output terminals for electrically connecting with an active and neutral terminal of the load; a sensor line for electrical connection to a reference which should be electrically isolated from the active terminal and in some circumstances the neutral terminal of the supply; at least one fault relay operable in a first mode such that the input and output terminals are electrically connected, and a second mode where the input and output terminals are electrically isolated; and a detector for actuating the at least one fault relay in response to sensing a current flowing through the sensor line which meets or exceeds a threshold current.</p> |
