FIELD: electric engineering, in particular, relay protection from one-phased abridgements.
SUBSTANCE: device has measuring organ of zero series current, executing repetitive relay, additionally included are 1...N zero-series current-measuring organs with time characteristic reversibly dependent on current, normally closed and normally open contacts of executive repetitive relays, direct current source, while common points of different measuring organs are connected to each other.
EFFECT: expanded functional capabilities, increased operational reliability due to detection and following disabling of damaged portion of electric plant.
1 dwg
