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
PGR-6100 Series - Ground-Fault and Insulation Monitoring Relay - Littelfuse
Siemens 3UG4615-1CR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Screw Terminal, 1CO For Vmin and Vmax Contacts, 0-20s For Vmin and Vmax Delay Time, 160-690 Line Supply Voltage: Amazon.com: Industrial
Siemens 3UG4616-2CR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Cage Clamp Terminal, 1 CO For Vmin and Vmax Contacts, 0-20s For Vmin and Vmax Delay Time, 160-690 (90-400 w.r.t. N)