Multiphase tripping device with short-circuit detection

Details Multiphase tripping device with short-circuit detection Multiphase tripping device with short-circuit detection

1988-08-31

1989-08-15

Paschall, M. H.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 78, H02H 308

Patent

active

048580570

ABSTRACT:
The invention relates to a device for picking-up voltage and for comparing the instantaneous powers of the individual phases with each other, the output of which is in functional connection with the tripping command transmitter in the event of a predetermined deviation.

REFERENCES:
patent: 3532935 (1970-10-01), Waldron
patent: 3697811 (1972-10-01), Little
patent: 3984737 (1976-10-01), Okamura et al.
patent: 4079435 (1978-03-01), Zaslavskaya et al.
patent: 4092690 (1978-05-01), Wilkinson
patent: 4100587 (1978-07-01), Anderson et al.
patent: 4218718 (1980-08-01), Sun
patent: 4296451 (1981-10-01), Wilkinson
patent: 4438475 (1984-03-01), Haley
patent: 4453191 (1984-06-01), Wilkinson
patent: 4698718 (1987-10-01), Chow et al.
Siemens-Energie Technik 2(1980) Hett12,499-502; Preuss & Schmelcher: Electronische Uberstromausloser FR Niederspannungsleistung Sschalter 3WE.

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