FIELD: electricity.
SUBSTANCE: device includes electronic switch with MOS structure, supplying power to load unit. A sequence of reference voltage source, second electronic switch unit, resistor and thermal resistor ensures actuation of relay element with hysteresis almost independent from temperature. Electronic switch unit connected to the common point of switch and load unit, with its output connected to adder input, enables exclusion of current sensor requiring significant heat removal, from the circuit. In case of current overload, power is disconnected from load unit.
EFFECT: reduced weight and dimensions of voltage switch, increased precision during resistance changes in open electronic switch depending on temperature.
1 dwg
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