Circuit interrupter with solid state digital trip unit and posit

Details Circuit interrupter with solid state digital trip unit and posit Circuit interrupter with solid state digital trip unit and posit

1980-04-15

1983-03-22

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

H02H 310

Patent

active

043778364

ABSTRACT:
A circuit interrupter includes a microcomputer controlled trip unit having a front panel numeric display and a plurality of LED displays for providing post tripping indication of cause-of-trip and trip current value. Reliable operation is provided during power up conditions. Means are also provided for accurate performance of long delay and ground fault tripping operation.

REFERENCES:
patent: 3818275 (1974-06-01), Shimp
patent: 3956670 (1976-05-01), Shimp et al.
patent: 4121269 (1978-10-01), Hobson, Jr.
patent: 4232236 (1980-11-01), Yomogida et al.
"A Microprocessor Oriented Data Acquisition and Control System for Power System Control"-Mulder, 3rd Annual Symposium on Computer Architecture, Clearwater, Fla., 19-21, Jan. 1976.
"Digital Processors for Substation Switching and Control"-Horne et al; 1975 Conference Developments in Power System Protection 11-13, Mar. 1975, London, England.
"Results at Field Experiments of Digital Relays Utilizing Minicomputer and Microprocessor", Suzuki et al., IFAC Conference on Automatic Control and Protection of Electrical Power Systems, 2/1977.
"Motor Protective Relay IC305 MLTA", Descriptive Bulletin, General Electric, 12/1978.
"Micro Versatrip Programmer . . . ", Eckart Industrial Power Systems, 6/1979.
"Operating and Instruction Guide", Matco Energy Monitor.

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