Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific quantity comparison means
Patent
1984-12-21
1987-06-02
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific quantity comparison means
361 89, 361 94, H02H 342
Patent
active
046708120
ABSTRACT:
The invention concerns a system for monitoring the operating condition of a switch by utilizing one or more integrating stages to determine the switching capacity and prevent overstresses. One or more monitoring devices for current, switch action rate, arc quench chamber insulation, contact condition, mechanical condition, operating temperature, or contact voltage are provided, which report the equipment condition, particularly the switching capacity. The sensors are functionally connected with the switchgear drive via a processing stage. The current sensors, together with a counting device, can report the .intg. i.n.dt, i.e. a measure of the stressing of the switch, and in doing so can disable the drive of the equipment. The invention serves the early detection of switchgear which is no longer fully operational, so that these can be replaced before an overstress occurs.
REFERENCES:
patent: 3594557 (1971-07-01), Anderson
patent: 3634871 (1972-01-01), Siedband
patent: 4012669 (1977-03-01), Gelfand et al.
patent: 4513342 (1985-04-01), Rocha
patent: 4527214 (1985-07-01), Hattori et al.
Doerfler Rudolf
Krause Kurt
Kummerow Gerd
Moerman Boudewijn
Schnabel Rudolf
DeBoer T.
James J. L.
Pellinen A. D.
Powers F. W.
Siemens Aktiengesellschaft
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