| 摘要 |
A method of, and apparatus for, detecting fault currents, such as short-circuits in electrical loads, especially at direct-current supply networks, wherein there is produced a current signal corresponding to the load current and compared with a reference value and when a difference signal appearing as a result of such comparison exceeds a threshold value such is employed as a triggering criterion. The rise or slope of the current signal is detected and the reference value is obtained by storing the value of the current signal present upon detection of a predetermined rise. |
