J3‑01 DC Undervoltage Overvoltage Relay EVR‑DGHL‑24 Bus Air‑Conditioner Voltage Protection Relay

J3‑01 EVR‑DGHL‑24 DC undervoltage overvoltage relay is specially developed for 24V DC on‑board bus air‑conditioning system. Built‑in digital display shows real‑time DC voltage value for easy on‑site commissioning and inspection. It supports customizable over‑voltage and under‑voltage threshold setting. When power supply voltage exceeds safe range, the relay will trigger protection output to safeguard compressors, controllers and other expensive electronic components from damage caused by voltage fluctuation. Vehicle‑grade construction withstands vibration and temperature changes of coach operation environment. Standard DIN‑rail housing enables simple installation inside electric control cabinet. It serves as perfect direct‑replace spare part for city bus, tourist coach and minibus air conditioning units.