Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1980-04-15
1982-05-25
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
H02H 304
Patent
active
043319998
ABSTRACT:
A circuit breaker includes a microprocessor-based trip unit and a power supply for supplying operating power to the trip unit and the trip coil of the circuit breaker from either the internal current transformers of the circuit breaker or a plurality of external sources. The trip unit includes a numeric display for displaying a sequential series of parameter values under normal conditions. Under low-power conditions, the power supply provides pulses of operating power sufficient to enable the trip unit to execute all of its limit check functions and present a flashing display of a single parameter value.
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"Results of Field Experiments of Digital Relays Utilizing Minicomputer and Microprocessor"-Suzuki et al. IFAC Conference on Automatic Control and Protection of Electrical Power Systems, 2/77.
"Motor Protective Relay IC 305 MLTA," Descriptive Bulletin, General Electric, 12/78.
"Micro Versatrip Programmer"-Eckart, Industrial Power Systems, 6/79.
"Operating and Instruction Guide," Matco Energy Monitor.
Elms Robert T.
Engel Joseph C.
Saletta Gary F.
Wafer John A.
Converse, Jr. Robert E.
Moose Jr. Harry E.
Westinghouse Electric Corp.
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