Fault current protective device

Details Fault current protective device Fault current protective device

1991-04-01

1993-08-24

Stephan, Steven L.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 63, H02H 316

Patent

active

052394387

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.

REFERENCES:
patent: 3895263 (1975-07-01), Clark
patent: 4685022 (1987-08-01), Nichols, III et al.

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