Ground leakage differential protective apparatus
USRE28996E · kind E · reissue
1Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1975 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Feb 19, 1995 |
Classification
- Technology area (CPC —)General
Abstract
A ground leakage differential current protective apparatus of the differential transformer type. An impedance is inserted in the grounded neutral line in series with the transformer and the load. A low impedance ground in the grounded neutral conductor still permits a potential to be developed across the grounded neutral winding so that the differential current required to initiate the tripping action is not substantially increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.