Monitoring Relay
A monitoring relay for phase failure, phase sequence.
Siemens 3UG5512-1AR20 is a SIRIUS digital/analog line-monitoring relay designed for 3-phase networks to monitor phase failure, phase sequence, and phase asymmetry with a 1-changeover (SPDT) contact and screw terminals. You can review official specs on the Siemens SiePortal.
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