DEVICE FOR LIMITING THE ELECTRICAL POWER CONSUMED BY THE LOAD Russian patent published in 2023 - IPC G01R21/06 G01R21/133 H02H9/02 

FIELD: electrical engineering.

SUBSTANCE: device for limiting the electrical power consumed by the load is intended for use in electrical engineering. The device contains a power switch, current and voltage sensors, and the current sensor is made in the form of a current transformer and a resistor, and the voltage sensor is made in the form of a resistive voltage divider, a single-crystal microcontroller, which is a central computing device connected to a power supply unit, a communication unit, a current and voltage signal processing device and a control device. An electronic device is used as a power supply, which is a power source for the elements of the device. An electronic device is used as a communication unit, with the help of which wireless communication with a single-crystal microcontroller is implemented. As a device for processing current and voltage signals, an electronic device is used that converts bipolar sinusoidal analog signals of measured current and voltage signals from current and voltage sensors into a digital signal reflecting their magnitude at the current time. An electronic device that directly controls the state of the power key is used as a control device. The control signal is transmitted to the control device from a single-crystal microcontroller. The power switch switches the load in such a way as to provide the required value of the effective voltage value on the load to maintain the power consumption within the specified limits. The device is capable of operating in both single-phase and three-phase networks.

EFFECT: device is capable of automatically limiting the power consumed by the load without completely disconnecting it from the mains for an arbitrary period of time by reducing the level of the current voltage on the load in conditions when the current value of the voltage on the load is maintained within the permissible limits of voltage deviation (±10% of the nominal value), with the recovery of the full voltage on load when the connected power is reduced below the maximum permissible level.

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