DEVICE OF THERMAL ENGINE PROTECTION Russian patent published in 2013 - IPC H02H5/04 H02H7/85 

FIELD: electricity.

SUBSTANCE: device of thermal engine protection is equipped with a unit of highest voltage identification, a unit of phase indication with the highest current, comparators, timers, prohibition elements, an OR element and a unit of engine overload current value indication, which provided for control of engine thermal condition by the highest phase current. The quantity of control channels by the overload current value and duration of its passage is necessary and sufficient for its full compliance with the time-current characteristic of the engine. The device has higher information value, making it possible to assess the condition of the engine both in process of operation and after its disconnection.

EFFECT: increased accuracy, reliability, reduction of dimensions, weight and cost, simplified adjustment and tuning of a device as a whole.

6 cl, 2 dwg