Siemens 3UG4614-1BR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Screw Terminal, 2 CO Contacts, Delay 0-20s On and Off Delay Time, 160-690 Line Supply Voltage: Amazon.com: Industrial & Scientific
Three-Phase Monitoring Relay in Three-Phase Three Wire Circuit Monitoring Quality - China Automotive Parts, Timer | Made-in-China.com