USED | ABB REJ601 FEEDER PROTECTION RELAY 24-240V AC/DC The ABB REJ601 Feeder Protection Relay is a reliable electrical component designed for industrial applications. Manufactured in Finland by the reputable brand ABB, this protection relay is capable of operating in the range of 24-240V AC/DC. It is specifically designed to ensure the safe and efficient operation of industrial equipment and machinery, making it an essential component for maintaining the functionality of various systems in a professional setting.