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Siemens 3UG4512-1AR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Screw Terminal, 1 CO Contacts, Delay Time, 160-690 Line Supply Voltage: Amazon.com: Industrial & Scientific
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ABB - 1SVR730660R0100 - Insulation Monitoring Relay, 24-240VAC, SPDT, Screw Term, DIN Rail, CM Series - RS
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