FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used in relay protection of ship electric installations against internal short circuits (s/c). Proposed device comprises device for directional current protection with interlocking incorporating additional AC sensor, directional relay of maximum alternating current, AC interlocking channel, output device, two AND logic elements and OR logic element.
EFFECT: wider field of application – possibility of being used for protection against internal s/cs of an electrical reversible converter.
1 cl, 2 dwg
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