Over-Voltage Protection: The device disconnects or safeguards equipment when voltage rises above a programmed threshold, preventing damage to sensitive electronics and motors 
Under-Voltage Protection: It prevents operation under dangerously low voltages that can harm compressors or reduce motor efficiency 
Over-Current Protection: Protects circuits from excessive current flows that could cause overheating or fire risks 
Phase and Asymmetry Monitoring: For three-phase models, the protector monitors phase sequence, phase loss, and asymmetry, ensuring that industrial machinery and air-conditioning systems operate safely