Apparatus for detecting malfunctions of an electrical device, an

Details Apparatus for detecting malfunctions of an electrical device, an Apparatus for detecting malfunctions of an electrical device, an

1987-10-19

1989-07-18

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 93, 361 84, H02H 324

Patent

active

048498491

ABSTRACT:
Apparatus for detecting malfunctions of an electrical device comprises a current transformer, connected to the electrical device a current-sensitive switch connected to the current transformer, a power supply connected to the current sensitive switch, and an indicator connected between the switch and a power supply. The switch is adapted to be switched on and prevent the indicator from being actuated by the power supply while the energy in the electrical device is greater than or equal to a predetermined level, and is adapted to be switched off and permit the indicator to be actuated by the power supply while the energy in the electrical device is less than the predetermined level.

REFERENCES:
patent: 3875464 (1975-04-01), Gary et al.
patent: 4425541 (1984-01-01), Burkum et al.
patent: 4434401 (1984-02-01), York
patent: 4510549 (1985-04-01), Tedesco
patent: 4536704 (1985-08-01), Burkum et al.
patent: 4540935 (1985-09-01), Burkum et al.
patent: 4541029 (1985-09-01), Ohyama
Information Data Packet from Smith Research & Technology, Inc., Mar. 1988.

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