FIELD: electrical engineering.
SUBSTANCE: invention relates to automatic relay protection systems (RPS) incorporated with switchgear (SWG) rated at 6 to 10 kV and serves to pinpoint electric arc initiating in switchgear cabinet and generate appropriate instruction to cur off current conducting circuits wherein arc originated. Proposed device comprises sensitive element, a lightguide with enclosure transparent for electric arc light radiation. Said lightguide is connected, via photoelectric converter, to threshold device input, while output of threshold device is connected to actuating member. Note that said sensitive element lightguide represents an optical fiber made from polymethylmethacrylate.
EFFECT: enlarged radius of protected zone.
1 dwg
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