Auto recloser coil burn-out protection

Details Auto recloser coil burn-out protection Auto recloser coil burn-out protection

1988-07-06

1990-02-06

Shoop, Jr., William M.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Automatic reclosing

361 75, 361115, 361166, 3611681, H02H 307

Patent

active

048992470

ABSTRACT:
An auto-recloser for a power line has a high voltage closing coil (12) for closing the main contact (14) in the power line, the closing coil being energized via a non-latching switching (18) in turn controlled by a low voltage closing coil (20). A time closing pulse is applied to the low voltage coil (20) to close switch (18) for a very short time period. A coil protection (24) monitors the status of the main contants (14) and if these have not closed after a preselected time period of typically 100 ms then the protection circuit opens a normally closed switch in series with the low voltage coil (20) to prevent further closing pulses being applied in further attempts to close the main contacts (14).

REFERENCES:
patent: 3381176 (1968-04-01), Riebs
patent: 3560798 (1971-02-01), Tenenbaum et al.
patent: 3846676 (1974-11-01), Ryczek et al.
patent: 4680706 (1988-07-01), Bray
patent: 4757416 (1988-07-01), Wilkerson

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