Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1986-03-17
1987-06-09
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 87, 307 66, H02J 900
Patent
active
046722270
ABSTRACT:
An automatic transfer switch with time delayed emergency generator system is taught. The microprocessor is interconnected with a programming device and with a shift register whereby a countdown time is programmed into the shift register by way of the microprocessor. Furthermore, an oscillator is provided which in turn provides a continuous supply of one second countdown pulses which are normally prevented from reaching the input countdown terminal of the shift register by a disable gate which is controlled by an output signal from the microprocessor. When the microprocessor loses power which is indicative of the power from the main source disappearing, as is the situation where an emergency generator would be desired, the disable device is immediately turned off allowing the countdown pulses to reach the shift register, thus starting the one second by one second countdown operation. Unless the power returns again to cause the microprocessor to be re-energized a countdown pulse will eventually emanate from the output of the shift register as determined by the countdown time programmed thereinto previously. At this point in time, the emergency generator will be started.
REFERENCES:
patent: 3876886 (1975-04-01), McClain et al.
patent: 4090090 (1978-05-01), Johnston
patent: 4096395 (1978-06-01), Bogel et al.
patent: 4231029 (1980-10-01), Johnston
patent: 4256972 (1981-03-01), Wyatt et al.
patent: 4311919 (1982-01-01), Nail
patent: 4383184 (1983-05-01), McFarland
patent: 4384213 (1983-05-01), Bogel
patent: 4429366 (1984-01-01), Kennon
Engel Joseph C.
Lagree James L.
Ip Shik Luen Paul
Moran M. J.
Shoop Jr. William M.
Westinghouse Electric Corp.
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