Load control receiver with line under voltage and line under frequency detection and load shedding

A system for responding to an under voltage event in an electrical delivery system that provides power to an electrical load, the system comprising:

• means for sampling a primary voltage source at regular time intervals thereby generating a series of voltage readings;
• means for comparing the voltage readings to an under voltage trigger threshold;
• means for detecting an under voltage condition and initializing an under voltage in-response cycle that controls the electrical load when the voltage readings are less than or equal to the under voltage trigger threshold for a predefined under voltage time period;
• means for storing a plurality of load restore counter values in memory before disengaging the load from the primary voltage source when the voltage readings decrease to below a voltage-power fail level which is below the under voltage trigger threshold;
• and
• means for initializing a restore response after the voltage level rises above a restore value and is maintained above the restore value for an under voltage-out time period.

A load control receiver with under voltage protection comprising:

• a transformer adapted to be electrically connected between a primary voltage source having a predefined voltage level and a load;
• a line under voltage (LUV) detection and measurement module electrically connected to the transformer and adapted to detect a line under voltage condition of the primary voltage source via the transformer;
• a microcontroller connected to the LUV detection and measurement module and adapted to send a command to disengage and engage an electrical load as a function of a measured voltage from the primary voltage source over a predefined period of time, wherein the measured voltage is compared to a predefined voltage threshold;
• and
• a load switch connected to the microcontroller and adapted to respond to a command from the microcontroller to disengage and engage the electrical load connected thereto from the voltage source.

A disturbance response system connected to a line voltage source comprising:

• a microcontroller;
• a memory arrangement connected to the microcontroller and adapted to store a plurality of under voltage threshold values and under voltage time periods;
• line voltage detection and measurement means connected between the micro-controller and the line voltage source for inputting a signal representative of the magnitude of the line voltage to the micro controller, and
• a load switch connected to the microcontroller that is adapted to respond to a command from the microcontroller to either remove a load from the line voltage source or restore the load to the line voltage source.