Current relay is a device designed for current consumption continuous monitoring and electrical appliances, transformers, motors against voltage drops, short circuits and other violations in the power supply network protection. Current relay operational principle is based on the current use value measurement. In case the set value is exceeded, the current control relay will disconnect the protected equipment.

Devices of this type are used to control:

Generators and pumping systems;
Machine-tool equipment of various types;
Household appliances.
Power limiter has a similar operating principle that is characteristic of a load-current limiter. The device controls the consumer power consumption for high-quality operation and, if exceeded, according to the set parameters, disables this consumer.

In the case of third-party consumers to unauthorized network access, such devices have a control function, as well as the function of electrical wiring when excess power is consumed protection. At the same time, power limiters are equipped with automatic reclosing (ACR) function, which allows the device to resume operation after an accident occurs.