Novatek-Electro PEF-301 Automatic Phase Switch 16A 400V AC

The Novatek-Electro PEF-301 is an automatic phase switch engineered to maintain a continuous power supply for single-phase loads within a three-phase 400V AC electrical network. By monitoring the voltage levels across all three phases, the device automatically selects and connects the load to the phase with the most stable parameters, ensuring that critical equipment remains operational even if one or two phases fail or experience significant voltage fluctuations.

Advantages

This automatic phase switch offers a robust solution for maintaining power stability without manual intervention. Its primary benefit lies in its ability to rapidly detect phase loss or voltage deviations, instantly switching the load to a healthy phase to prevent equipment downtime. The device is built to handle a current rating of 16A, making it suitable for a wide range of residential and industrial applications where reliable power is essential for sensitive electronics and control systems.

Suitable for

• Residential power supply systems to prevent outages during phase failure.
• Industrial control panels requiring continuous single-phase power.
• Sensitive electronic equipment that requires stable voltage input.
• Backup power management in three-phase electrical installations.

When it may not be suitable

This device is not designed for loads exceeding the 16A current rating, and attempting to connect higher-power equipment may damage the unit. It is also not intended for use in DC power systems or networks operating outside the specified 400V AC range.

Key specifications

• Rated voltage: 400V AC
• Maximum current: 16A
• Phase monitoring: Three-phase input
• Function: Automatic phase selection

How to use

The PEF-301 should be installed by a qualified electrician within a standard electrical distribution board. The three-phase input lines are connected to the designated terminals, and the single-phase load is connected to the output terminal. Once powered, the device continuously monitors the incoming voltage. If the voltage on the active phase drops below or rises above the set thresholds, the internal relay automatically switches the load to the next available phase that meets the required parameters.

What to consider before purchase

• Ensure your total load current does not exceed 16A.
• Verify that your electrical installation is a three-phase 400V AC system.
• Check the available space in your distribution cabinet for mounting.
• Confirm that the device meets the specific voltage stability requirements of your connected equipment.

Usage recommendations

For optimal performance and safety, ensure all terminal connections are tightened securely according to the installation manual. Regularly inspect the device for signs of wear or overheating, and ensure the surrounding environment is free from excessive moisture or dust.