Universal automatic electronic phase switch PEF-319 NTPEF3190

Intelligent power management with PEF-319

The universal automatic electronic phase switch PEF-319 is an advanced device designed to provide uninterrupted and stable power to single-phase loads in three-phase networks. It is ideal for both industrial and home installations, protecting sensitive equipment from voltage fluctuations and ensuring its reliable operation. This is a solution for installers looking for a universal and effective way to protect power supplies, and for users – a guarantee of peace of mind about the operation of connected devices.

How does PEF-319 work?

The device monitors the voltage on all three phases and automatically selects the one that provides the most stable and optimal power parameters, according to user-preferred settings. Thus, even in the event of problems with one of the phases, the connected devices will still be powered without interruption. Depending on the power consumption, PEF-319 can power the load directly (up to 6.6 kW / 30 A) or control contactors with appropriate power (for loads above 6.6 kW – contactors are not included in the set). This is flexibility in application and the ability to adapt to different needs.

Functions and benefits

• Reliable power supply: Automatic phase selection ensures the continuity of energy supply, minimizing the risk of downtime in device operation.
• Protection against voltage fluctuations: PEF-319 protects sensitive receivers from damage caused by unacceptable voltage changes in the network.
• Flexibility of application: Possibility of direct power supply to devices up to 6.6 kW and control of contactors for larger loads.
• Simple configuration: Setting the minimum and maximum voltage thresholds allows you to adapt the device's operation to specific network conditions.
• LED indication: LED indicators inform about the current operating status of the device and the selected power phase.
• Compact dimensions: A housing with a width of 9 DIN (162 mm) makes it easy to mount in standard electrical switchboards.
• Durability and reliability: Made of high-quality materials guarantees a long service life of the device.

Installation and application

The phase switch PEF-319 is mounted on a DIN rail in an electrical switchboard. It is designed to work with three-phase four-wire networks (3x400 V + N) and single-phase loads with a voltage of 230/240 V, 50 Hz. It finds application everywhere where protection of sensitive equipment against disturbances in the electrical network is required – in homes, workshops, industrial plants or offices. Thanks to its versatility, it is an ideal solution for both new installations and modernization of existing power supply systems.