Protection circuit for multiple phase power system

Details Protection circuit for multiple phase power system Protection circuit for multiple phase power system

1992-08-21

1993-09-07

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 85, H02H 326

Patent

active

052434893

ABSTRACT:
A protection circuit for three-phase power systems incorporates overcurrent protection along with phase loss and phase imbalance by means of common current sensing transformers. The phase loss and phase imbalance are determined by a pairwise comparison algorithm.

REFERENCES:
patent: 3848160 (1974-11-01), Boothman et al.
patent: 4021703 (1977-05-01), Gary et al.
patent: 4060843 (1977-11-01), Bost
patent: 4589052 (1986-05-01), Dougherty
patent: 4754247 (1988-06-01), Raymont et al.
patent: 4837654 (1989-06-01), Chen et al.

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