Fault current protective device
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United States of America Patent
Stats
-
Aug 24, 1993
Grant Date -
N/A
app pub date -
Apr 1, 1991
filing date -
Mar 31, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fault current protective device contains a fault current protective switch (2) for the protection of at least two circuits formed by branching subsequent to the fault current protective switch (2) and having the same number of phases. One of these circuits is looped through the fault current protective switch (2) again at least once over connections (L2, L3, and L2', L3'), respectively, of the fault current protective switch (2) which are free of use, so that a higher protection level (lower nominal fault current I.sub..DELTA.n) is obtained relative to the other circuit. Only one fault current protective switch (2) is required for this purpose, so that the fault circuit protective device is compact and economical.
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