Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1990-11-09
1993-06-15
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
340664, H02H 304
Patent
active
052204790
ABSTRACT:
The front panel of the trip device is formed by a flat screen display, for example liquid crystal, controlled by the trip device microprocessor. The display provides a permanent display of the information relating to the type of trip device, the tripping parameters and measured values, from data entered in the trip device memory. Display is in alphanumeric and/or graphic form.
REFERENCES:
patent: 4266105 (1981-05-01), Perkins
patent: 4429340 (1984-01-01), Howell
patent: 4780786 (1988-10-01), Weynachter et al.
patent: 4991042 (1991-02-01), Tokarski et al.
patent: 5019956 (1991-05-01), Nakayama et al.
patent: 5038246 (1991-08-01), Durivage, III
Patent Abstracts of Japan, Publication No. 62280655. (Shikoko Electric Power) May, 12, 1987 vol. 12, No. 166 (P-704).
Leija Ronald W.
Merlin Gerin
Pellinen A. D.
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