Modular | Digital automatic phase switching relay | from 380V to 230V | 3F | 63A | DIN

Technical Specifications: Input Terminals: N, L1, L2, L3
Rated Power Supply Voltage: AC 3×220V (N-L1/L2/L3)
Frequency: 40/50/60/70 Hz
Overvoltage Detection Range: 230–300V
Voltage Drop Detection Range: 140–210V
Automatic Reconnection Delay (Ton): 1–600 s
Return to Priority Phase Delay: 1–600 s
Switching Delay to Backup Phases: <0.2 s
Voltage Hysteresis: 5V
Overvoltage Disconnection Delay: 0.1 s (>350V: 0.02 s)
Voltage Drop Disconnection Delay: 0.1 s (>350V: 0.02 s)
Voltage Accuracy: <1%
Max Operating Phase Voltage: 350V
Rated Operating Current: 63A  
Storage Temperature: -25°C ~ +55°C
Mounting: DIN Rail

Main Functions:

Automatic phase switching based on set priority
Overvoltage and voltage drop protection – protects electrical equipment from damage
Overload protection – protects against excessive current consumption
LED indication – clear operating status display
Precise parameter adjustment using buttons
Ultra-fast phase switching – less than 0.2 s
DIN rail mounting – easy and convenient installation
Usage: This automatic circuit breaker is designed for use in three-phase electrical systems where stable power supply and protection of equipment from network fluctuations are necessary.

Residential buildings – protects from power supply interruptions
Industrial sites – used in production equipment, server rooms, and other sensitive systems
Offices and shopping centers – supports continuous operation
Backup power systems – used with generators or backup power lines

Advantages:

Automatic switching – reduces power supply interruptions
Fast response – phase switching in less than 0.2 s
High precision – voltage accuracy of less than 1%
Wide frequency support – suitable for various electrical networks (40–70 Hz)
Protection from overvoltage and voltage drop – increases equipment longevity
Easy installation – mounting on DIN rail
Disadvantages:

Not suitable for single-phase systems – only for three-phase systems
Lack of IP rating – requires a protected electrical cabinet
Manual parameter setting – may require time for optimal adjustment
The automatic switching circuit breaker is a reliable solution to ensure uninterrupted power supply and protect electrical equipment from voltage fluctuations and overloads. It is widely used in both domestic and industrial settings, is easy to mount on a DIN rail, and has clear LED indication. If you need a stable and secure power supply solution, this is an excellent choice.