Subcategories:   Phase Monitoring Relays    Alternating Relays    Pump Seal Failure Relays

ProSense™ Motor Control Relays Quality motor monitoring, motor load protection, and motor control products! Phase Monitoring Relays for phase loss protection Alternating Relays for motor load protection Pump Seal Failure Relays for seal failure detection AutomationDirect offers three types of monitor relays for motor control. Phase monitor relays provide protection against premature equipment failure caused by undervoltage or overvoltage faults on 3-Phase systems. All ProSense 3 phase monitor relays are designed to be compatible with typical Wye or Delta systems. Phase monitoring relays protect against single phasing regardless of any regenerative voltages. These monitor relays are also known as overvoltage relays, undervoltage relays, voltage monitoring relays, or phase loss relays used for phase monitoring and phase loss protection. Phase Monitoring Relays Overview Alternating relays are used for motor load protection in special applications where the optimization of load usage is required by equalizing the run time of two loads. The alternating action for motor load control is initiated by a control switch, such as a float switch, manual switch, timing delay, pressure switch, or other isolated contact. Each time the initiating switch is opened, the output relay contacts will change state, thus alternating the two loads. Alternating Relays Overview Pump seal failure relays are designed to monitor the shaft seals of submersible pumps. A resistive-measuring probe provided by the pump manufacturer is installed in the pump seal cavity. If the seal starts to leak, contaminating fluid enters the seal cavity, lowering the resistance between the internal probe and the common connection. Pump Seal Failure Relays Overview Phase Monitoring Relays Alternating Relays Pump Seal Failure Relays PMRU Series provides protection against phase loss, phase reversal, phase unbalance, undervoltage and overvoltage conditions. PMRR Series provides protection against phase reversal. PMRRL Series provides protection against electric motor phase loss, phase reversal and undervoltage conditions. Starting at $39.00 (PMRR-1C-480A) AR Series alternating relays have a three-position selector switch that allows the unit to alternate the two loads as normal, or lock the relay to one load or the other. ARX series alternating relays have a three-position selector switch that allows a DPDT cross-wired unit to alternate the two loads as normal, or lock the relay to always operate the same load first each time. Priced from $21.00 (AR-1C-120A) PSFR series pump seal failure relays are designed to monitor the shaft seals of submersible pumps. Two pump seal failure relays are available: - 8-pin SPDT single channel relay - 8-pin dual channel relay, with 2 SPNO contacts Starting at $47.75 (PSFR-1C-120A)

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