Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1984-07-09
1986-09-16
Slace, Patrick R.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
361 31, 361 59, H02H 300, H02H 700, H02H 902
Patent
active
046125957
ABSTRACT:
DC power control system for use in an electric vehicular system has DC power supply and power conductors. A meter relay in a control unit enclosure displayably measures the DC current in the conductors and simultaneously establishes an overcurrent limit for tripping out the conductors when the limit is exceeded. Meter calibration and tripping function are testable by a test switch for substituting an adjustable DC test source in place of a conductor meter shunt to the meter relay. Application of DC to shorted power conductors is prevented by preliminary low power DC isolated AC relaying across the conductors. The test switch substitutes a low resistance for the power conductors to also test the AC tripping action. If the power conductors are already energized from a remote power supply, the local power supply is prevented from access by DC responsive relaying during a preliminary time period. After a problem is detected, the control system locks out so as to demand operator attention if the problem persists.
REFERENCES:
patent: 2874337 (1959-02-01), Sorensen
patent: 2991397 (1961-07-01), Place
patent: 3066284 (1962-11-01), McKinley et al.
patent: 3609459 (1971-09-01), Thompson
patent: 3946279 (1976-03-01), Paice et al.
patent: 3975663 (1976-08-01), Moorey
patent: 4159501 (1979-06-01), White
patent: 4296450 (1981-10-01), Paice et al.
patent: 4340920 (1982-07-01), Gill et al.
patent: 4454555 (1984-06-01), DeLacy
Evans Vernon C.
Gill Ronald P.
Hoff Marc S.
Peabody Coal Company
Slace Patrick R.
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