PEF-319 phase selection relay with display

Description

PEF-319 is designed to supply an industrial/ appliance single-phase 220V/50Hz load from three phases four-wire mains 3×380 N in order to maintain uninterrupted power supply of essential single-phase loads and protect them against unallowable voltage variations in the mains.

According to the voltage presence and voltage quality on the phases, the PEF-319 will automatically select the optimum phase in the limits range set by the user and switch the single-phase load supply to this phase:

• If power is less than 6,6 kW (30 A), the load is energized directly from the PEF-319;
• if power is more than 6,6 kW (30 A), the PEF-319 controls the magnetic starters (MS) single-phase coils of the corresponding power (MS are not included in supply complete package).