Modular | digital voltage and current control | protection | phase sequence imbalance relay | 3P | 63A | 380VAC | DIN

Technical Specifications

Power supply voltage: 3 × 230 / 400 V AC, 50/60 Hz
Rated current: 63 A
Mounting: 35 mm DIN rail

Protection functions:
• Overvoltage protection
• Undervoltage protection
• Automatic recovery
• Voltage measurement and display (digital voltmeter)
• Phase imbalance protection
• Phase sequence and reverse phase protection
• Neutral line break protection
• Phase loss protection

Protection limits and settings:
• Overvoltage limit: 230–300 V (adjustable), default 270 V
• Overvoltage recovery: 225–295 V (default 265 V)
• Overvoltage response time: 0.1–30 s (default 1 s)
• Undervoltage limit: 140–210 V (adjustable), default 170 V
• Undervoltage recovery: 145–215 V (default 175 V)
• Undervoltage response time: 0.1–30 s (default 1 s)
• Phase imbalance setting: 20–95 V (adjustable, can be disabled)
• Power-on delay: 1–500 s (default 10 s)
• Recovery delay: 1–500 s (default 30 s)

Operating temperature: -20…+55 °C
Housing: Flame-retardant ABS plastic
Display: Digital LED, shows real-time phase voltages

Functions and operating principle
The relay continuously monitors all three phase voltages and detects deviations from preset limits.
When an overvoltage, undervoltage, or phase loss occurs, the relay automatically disconnects the circuit, protecting the system from damage.
Once voltage stabilizes, the device automatically restores power after a preset delay to prevent transient surges.
The built-in LED display and control buttons allow users to easily adjust voltage limits, delay times, and imbalance sensitivity.

Applications
For home users: Protects household electrical networks, refrigerators, air conditioners, pumps, and other sensitive equipment from voltage fluctuations.
For engineers: Suitable for industrial systems – motor protection, control stations, heat pumps, and production lines.
For electricians: Easy DIN rail mounting, clear LED display, and simple configuration make setup fast and reliable.
Ideal for use in distribution panels, generator systems, UPS units, and solar inverters as an additional protection stage.

Pros

Adjustable overvoltage and undervoltage limits

Protection from phase sequence errors, phase loss, and imbalance

LED display shows real-time voltage in all phases

Automatic voltage recovery

Durable housing and easy DIN rail mounting

Manual voltage calibration

Reliable protection up to 63 A load

Cons

Not suitable for single-phase systems

Requires careful configuration before operation