220V 63A Overvoltage Protection Relay — Real-time monitoring and automatic circuit disconnection to prevent damage
Voltage fluctuations strike without warning. A 260V spike lasting just a few seconds is enough to fry an inverter, refrigerator, or control panel. This 220V 63A protection relay disconnects the circuit in a fraction of a second and will not reconnect until the power supply has returned to safe, stable parameters.
Note: This device is intended for installation in electrical distribution boards by qualified personnel. Please verify compatibility with your existing installation before use.
Why choose this model? (Key Advantages):
- Adjustable thresholds for three fault types — Overvoltage (130–300V), undervoltage (80–210V), and overcurrent (0.1–63A), all independently configurable to suit your specific installation.
- 63A maximum current capacity — Handles high-consumption circuits including electric boilers, air conditioning units, ovens, and washing machines without limitations.
- Adjustable recovery time (1–999 seconds) — You decide when the power resumes, not the grid; this allows sufficient time for the voltage to fully stabilise.
- LED display with real-time voltage, current, and frequency — No more guessing; monitor your circuit directly from the board with auto-dimming standby brightness.
- Password-protected settings — Prevents accidental or unauthorised changes to your thresholds, essential for installations with multiple users.
- Robust terminals for heavy-duty cables — 4 large terminals ensure secure input and output connections, eliminating the risk of loose contacts over time.
Performance and Technical Details
The overcurrent detection algorithm works in parallel with voltage monitoring. If consumption exceeds your set limit, the relay cuts the circuit regardless of whether the voltage is within normal ranges, providing genuine protection beyond simple voltage spikes. The rapid response time keeps your equipment’s exposure to abnormal conditions to an absolute minimum. Once the fault is cleared, the recovery mode can be set to automatic or manual, giving you full control over how your system restarts.
| Parameter | Value / Detail |
|---|---|
| Rated Voltage | 220V Single-phase |
| Max Current Capacity | 63A |
| Overvoltage Protection Range | 130 – 300V (adjustable) |
| Undervoltage Protection Range | 80 – 210V (adjustable) |
| Overcurrent Protection Threshold | 0.1A – 63.0A (adjustable) |
| Recovery Delay Time | 1 – 999 seconds (adjustable) |
| Recovery Mode | Manual or Automatic |
| Display | Digital LED — voltage, current, frequency |
| Standby Function | Automatic display dimming |
| Security | Password-protected settings |
| Connections | 4 large terminals (Phase + Neutral In/Out) |
| Network Type | Single-phase |
Programming and Usage Instructions
- Accessing the menu: Press the set button to enter the device’s main menu.
- Setting overvoltage threshold: Navigate to the relevant parameter and input your desired value between 130–300V.
- Setting undervoltage threshold: Input your protection value between 80–210V based on your installation requirements.
- Configuring overcurrent threshold: Set the trigger value between 0.1A and 63.0A according to the maximum load of the protected circuit.
- Choosing recovery mode: Select automatic or manual recovery and set the delay time between 1 and 999 seconds.
- Activating password lock: Enter and confirm your password to protect your configuration from unauthorised changes.
- Verifying operation: Monitor the LED display for real-time voltage, current, and frequency readings to confirm the relay is functioning correctly.
Package Contents
- 1x 220V 63A Single-phase monitoring and protection relay with digital display
Frequently Asked Questions
Does it work in standard residential DIN-rail electrical boards?
Yes, the relay is designed for direct DIN-rail mounting and is compatible with standard electrical distribution boards found in homes, offices, and commercial spaces.
What happens when the voltage returns to normal after a spike?
It depends on your settings. In automatic mode, the relay restarts after the configured delay time (1–999 seconds). In manual mode, you must reset it yourself—useful if you wish to inspect the installation before power is restored.
Can it protect an electric boiler or air conditioning unit?
Yes. With a 63A capacity, it easily handles boilers, air conditioning units, washing machines, and electric ovens, either individually or in combination, depending on the total circuit load.
Does this replace the circuit breakers in my board?
No. This overvoltage protection relay complements your existing circuit breakers and RCDs; it does not replace them. It should be installed alongside your existing protective equipment.
Photo Gallery
*h**a* M*l*** –
A great “insurance policy” for home appliances. It was easy to mount on the rail and the digital readout is very clear.