Under-voltage monitoring relay 80 - 540 V | 269R
over-voltagephase sequencephase loss

under-voltage monitoring relay
under-voltage monitoring relay
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Measured/monitored value
under-voltage, over-voltage, phase sequence, phase loss
Other characteristics
Trigger voltage

Max.: 540 V

Min.: 80 V


he Model 269R Over & Under 3-Phase Monitor continuously monitors 3-phase lines for high voltage, low voltage, phase loss or phase reversal, and an adjustable .3 - 5 minute restart delay. This device features a solid-state voltage and phase angle sensing circuit, which drives a SPDT output relay. The Model 269R is independent of the system load, and may be used on any horsepower motor. When phase sequence is correct, and the voltage remains between the upper and lower trip points, the output relay remains energized. When a fault condition is sensed, the output relay drops out. The Model 269R does not require a neutral connection, and can be used on Wye or Delta systems. Each of the four voltage versions can be adjusted over a wide range. An adjustable restart delay (0.3-5 minutes) allows compressor head pressures to bleed off, in the event of short-term power failures. OVER and UNDER voltage failure indicators aid in calibration and system troubleshooting.


*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.