Prok Dvs Make STATIC OVER VOLTAGE (OV) AND UNDER VOLTAGE (UV) RELAY WITH PHASE
FAILURE (SINGLE PHASING) AND PHASE REVERSAL RELAY available in five models i.e. VD-02,
VD-03, VD-04, VD-05 and VD-06 for various applications. They are provided with fixed or
variable voltage settings, auto reset, definite time delay fixed or variable settings.