Siemens Industrial Controls 3UG5512-1AR20 Monitor Relay 160-690V

The Siemens Industrial Controls 3UG5512-1AR20 Monitor Relay is always on the lookout for power systems ranging from 160 to 690V AC to detect problems like phase failure, wrong phase sequence, and phase asymmetry. In case any of these conditions occur, the relay will engage a changeover contact allowing the triggering of alarms or equipment shutdown to prevent damage. HVAC installations that require three-phase power to operate motors in such places as air handling chillers, and pumps, a relay is necessary. Using its protective function, this element reduces the risk of equipment failure due to bad power conditions, reducing the downtime and maintenance costs and raising the service life of HVAC systems.