FIELD: electronic engineering.
SUBSTANCE: device contains current sensor, electronic switch, load block, first and second relay elements, device for setting activation threshold of first relay element, device for setting activation threshold of second relay element, integrating unit, first and second powering voltage supplies, temperature sensor, NOT and OR-NOT elements with open collector output, voltage divider, indicator, decoupling diode, current-limiting resistor and galvanic decoupling block.
EFFECT: expanded functional capabilities and increased reliability due to realization of overheating protection, operative control of voltage commutator operation modes, connection of load block both to positive and to negative bus of powering voltage supply, usage of non-inductive low-ohm resistors as current sensor.
1 dwg
