发明名称 |
|
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. |
申请公布号 |
DE2753517(C2) |
申请公布日期 |
1984.06.20 |
申请号 |
DE19772753517 |
申请日期 |
1977.12.01 |
申请人 |
BBC AKTIENGESELLSCHAFT BROWN, BOVERI & CIE., BADEN, AARGAU, CH |
发明人 |
ROHR, ANDRE, CHATELAINE, CH |
分类号 |
H02H3/08;H02H3/44;(IPC1-7):02H3/08;02H7/26;01R27/16 |
主分类号 |
H02H3/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|