DFY-5 power protector is a multifunctional monitoring and protection instrument for three-phase power systems or three-phase electrical equipment. Integrating three-phase voltage display, overvoltage protection, undervoltage protection, phase loss protection (phase failure protection), and phase sequence protection (phase mismatch protection). Adopting Chinese LCD display, it has the characteristics of complete functions, stable performance, and easy operation.
The DFY-5 power protector can display the three-phase power supply voltage in real time, and can provide users with alarm output and contact control signals for protection circuit action output through relay output in case of overvoltage, undervoltage, phase loss, or phase error faults in the power supply, playing an alarm and protection role. It is a high-tech product that replaces traditional phase sequence relays and voltage relays.

Main functions
Display voltage: Display the working voltage value
Overvoltage/undervoltage protection: When the voltage is too high or too low, cut off the power supply of the equipment.  
Phase loss protection: Cut off the power supply of the equipment when there is a phase loss or severe imbalance in the three-phase power supply.  
Phase sequence protection: Cut off the equipment power supply when the phase sequence of the three-phase power supply is incorrect.  
Sound and light alarm: Sound and light prompts will occur when the above-mentioned faults occur.

Main technical parameters
Rated control voltage Us: phase voltage AC-220V, line voltage AC-380V
Power supply voltage error: -15%~+10%
Working environment: Temperature -10 ° C~50 ° C
Output contact capacity: 2A/250VAC
Frequency: 50/60HZ
Weight: 85 grams

Product dimension diagram:

Scope of application of the product
Mobile device control (on-site equipment, agricultural equipment, refrigerated trucks)
Central air conditioning unit
Oil pump
To protect personal safety and prevent reverse operation of equipment (such as lifting, transportation, elevators, escalators, etc.)
Prevent dangerous transmission loads (phase loss)
Normal/Emergency Power Switching