The new PUVR44 Under voltage relay is designed to monitor a three-phase 4-wire supply for an under voltage condition on one or more phases. It can also detect phase and neutral loss. The product offers the user a choice 6 selectable nominal voltages as well as adjustments for under voltage trip setting, differential setting and time delay. Wide operating supply voltage, clear LED indication for supply and relay status and DPDT relay output complete the features offered.

Due to the nature of the design, the product is also capable of being used in applications that suffer from disturbances on the supply such as excessive overvoltages and harmonics. Such key features ensure that the product will continue to operate and only trip when a genuine fault occurs.