FIELD: electricity.
SUBSTANCE: intrinsically safe voltage limitation device has a controller bus, a grounding bus, as well as a shunt regulator assembly. Shunt regulator assembly is connected to controller bus and grounding bus and comprises one or more control units. Shunt regulator assembly is designed to limit voltage applied to controller bus and grounding bus, to limit voltage to a safe value. Intrinsically safe voltage limitation device also includes a unit which is sensitive to change of power, configured to activate one or more limiting units for reduction of power dissipated on corresponding control units without increasing voltage limitation.
EFFECT: higher reliability.
18 cl, 6 dwg
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