ABB UA1-415 Industrial Control Relay Module For Industrial Automation Applications

ABB UA1-415 Undervoltage Release is an accessory module designed to mount on the left side of ABB motor protection circuit breakers (MS116, MS132, MO132, MS165, MO165) to trip the device when supply voltage falls below a preset threshold. It supports 415 V at 50 Hz and 480 V at 60 Hz control voltages, making it suitable for European and North American power networks in industrial automation applications. This UA1-415 unit, part number 1SAM201904R1007, is intended for use with ABB’s UA1 undervoltage family to provide reliable protection against undervoltage conditions that could lead to motor stall or damage in automation panels. By integrating this undervoltage release with compatible motor protection breakers, you gain automatic disconnection under undervoltage events, helping protect equipment and maintain safe startup sequences in control cabinets and machine controls. Common applications include panel boards and motor control centers in manufacturing and processing facilities that rely on ABB MS/MO breakers to protect motors from undervoltage conditions.