FIELD: electricity.
SUBSTANCE: device comprises unit of power direction control, start-up unit of minimum frequency, logical unit, the first - third timers, the first and second logical elements OR, the first and second actuating units and unit of minimum voltage control. The first actuating unit is outlet of the first stage of power supply loss protection and disconnects breaker of de-energised distributing device bus bar section of 6(10) kV and suppresses field of synchronous electric motors. The second actuating unit is outlet of the second protection device and disconnects synchronous electric motors on section of bus bars that lost supply.
EFFECT: improved stability of technological systems due to accelerated action of protection reduced down time of technological sets and increased efficiency of de-energised motors disconnection.
1 dwg
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