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Please note that due to Thanksgiving Holidays in the USA on the 23rd / 24th November, our delivery schedule will be disrupted this week.

The deadline for orders this week is 4pm on Tuesday 21st November.

Orders for goods that are not in stock in the UK, received after 4pm, will be shipped on 5th/6th December.

Motor 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

  • 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.

  • 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.

  • 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.


Alternating relay, for use in applications requiring load usage optimization by equalizing the run time of two loads. 120VAC coil voltage, SPDT, 10A contact. AR-1C-120A

Alternating relay, for use in applications requiring load usage optimization by equalizing the run time of two loads. 120VAC coil voltage, SPDT, 10A contact.

Price (Ex VAT):
25.78


(Stocked in UK, 4-8 working days delivery if out of stock)

Quantity:  


Alternating relay, for use in applications requiring load usage optimization by equalizing the run time of two loads. 120VAC coil voltage, DPDT, 10A contact. ARX-2C-120A

Alternating relay, for use in applications requiring load usage optimization by equalizing the run time of two loads. 120VAC coil voltage, DPDT, 10A contact.

Price (Ex VAT):
27.00


(Stocked in UK, 4-8 working days delivery if out of stock)

Quantity:  


Relay socket, works with all phase monitor relays, 600V rated, 8-pin octal configuration. Can be mounted on 35mm DIN rail or directly mounted to the panel. 70169-D

Relay socket, works with all phase monitor relays, 600V rated, 8-pin octal configuration. Can be mounted on 35mm DIN rail or directly mounted to the panel.

Price (Ex VAT):
3.92


(5-10 working day delivery)

Quantity:  


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