ABB EF65-70 Electronic Overload Relay 1NO 1NC 20-70A

The ABB EF65-70 Electronic Overload Relay 1NO 1NC 20-70A is a motor protection unit used in industrial control panels to safeguard electric motors from overload and phase breakdown conditions. It provides electronic overload protection, selectable trip classes, and automatic or manual reset capability for motor starters and contactors in HVAC systems. It is placed directly with motor control assemblies, where it continuously monitors motor current and interrupts the control circuit when abnormal operating conditions occur. It is essential to support stable operation of pumps, air conditioners, compressors, and other electrically controlled equipment.