PEF-301 universal automatic electronic phase switch

The electronic phase switch PEF-301 is designed to supply industrial and household single-phase loads 220V / 50Hz from a three-phase four-wire network 3x380 + N in order to ensure uninterrupted power supply for especially critical single-phase consumers and protect them from unacceptable voltage fluctuations in the network.

Depending on the presence and quality of the voltage in the phases, PEF-301 automatically selects the most favorable phase and supplies a single-phase load of any power from it:
• at a power of up to 3,5 kW (16 A), the load is powered directly from PEF-301;
• PEF-301 universal automatic electronic phase switch controls the magnetic starters (MS) coils of the corresponding power (the package doesn’t include MS) at the power, exceeding 3.5 kW (16 A).
The user sets the minimum and maximum voltage thresholds.