FIELD: electricity.
SUBSTANCE: device comprises automatic circuit breaker, voltage limiter, current sensor and unit of generation of signal of load and voltage limiter disconnection from source of supply provided that current passing along voltage limiter exceeds specified threshold value, besides, the first additional unit of generation of signal of load and voltage limiter disconnection from source of supply provided that voltage arriving from grid exceeds specified threshold value, and the second additional unit of generation of signal of load and voltage limiter disconnection from source of supply provided that energy released at voltage limiter exceeds specified threshold value, voltage sensor and OR circuit.
EFFECT: increased reliability of overvoltage protection device and increase of its durability.
3 cl, 2 dwg
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