Direct AC-DC converter fault protection system

Details Direct AC-DC converter fault protection system Direct AC-DC converter fault protection system

1988-07-18

1990-01-23

Shoop, Jr., William M.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 18, 363 50, H02H 710

Patent

active

048962422

ABSTRACT:
In a direct AC/AC converter, fault protection is performed with a minimal number of fault detecting devices and the rating of such fault detecting devices is reduced while still being able to respond quickly to a fault current. This is achieved by using a current sensor in common to at least all the current lines of one group of switches and by combining the operation of such common current sensor with the operation of one current sensor associated with the related output phase line. In another embodiment, all the current lines connected to a switch, for all the groups of switches, are passed through a common and single current sensor.

REFERENCES:
patent: 3848175 (1974-11-01), Demarest
patent: 4208691 (1980-06-01), Rogowsky
patent: 4475150 (1984-10-01), D'Atre et al.
patent: 4490780 (1984-12-01), Nondahl
patent: 4521840 (1985-06-01), Hoadley
patent: 4535378 (1985-08-01), Endo
patent: 4620272 (1986-10-01), Fulton et al.
patent: 4672526 (1987-06-01), Mehnert et al.
patent: 4723188 (1988-02-01), McMurray

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