220V 40A/63A Voltage Relay Protector & KWH Energy Meter
220V 40A/63A Voltage Relay Protector & KWH Energy Meter
220V 40A/63A Adjustable Voltage Relay Protector with KWH Energy Meter & Power Display
Keep your electrical appliances and circuits safe with this versatile 220V Adjustable Voltage Relay Protector. Designed for single-phase AC systems, it combines over-voltage, under-voltage, and over-current protection with a built-in wattmeter and kilowatt-hour (KWH) energy meter — all in one compact DIN rail-mountable unit. Whether you're protecting home appliances, workshop equipment, or industrial machinery, this all-in-one protector monitors and safeguards your electrical setup automatically.
Made in Mainland China.
Key Features
- Over-Voltage Protection: Automatically trips when voltage exceeds your set threshold (230–300V), disconnecting the load to prevent damage.
- Under-Voltage Protection: Trips when voltage drops below your configured minimum (140–210V), shielding sensitive devices.
- Over-Current Protection: Adjustable current limit from 1A to 40A or 63A (model-dependent); disconnects automatically when exceeded.
- Automatic Recovery: Reconnects automatically after voltage/current returns to safe levels, with a programmable reset delay (1–600 seconds).
- Real-Time Voltage & Current Display: Clear digital readout of live voltage and current measurements for at-a-glance monitoring.
- Integrated KWH Energy Meter / Wattmeter: Tracks power consumption in real time — ideal for managing energy usage and costs.
- DIN Rail Installation: Standard 35mm DIN rail mount for quick, clean installation in electrical panels and enclosures.
- Wide Operating Voltage Range: Functions across AC 80–400V, making it compatible with a broad range of single-phase electrical systems.
Technical Specifications
| Rated Supply Voltage | AC 220V |
| Operating Voltage Range | AC 80–400V (Single Phase) |
| Rated Frequency | 50/60 Hz |
| Rated Current | 40A or 63A (see product label) |
| Over-Current Setting Range | 1–40A / 63A or OFF |
| Over-Voltage Setting Range | 230–300V or OFF |
| Under-Voltage Setting Range | 140–210V or OFF |
| KWH Protection Value | 1–9999 or OFF |
| Trip Delay Time | 0.5 seconds |
| Reset / Start Delay Time | 1–600 seconds (programmable) |
| Voltage Measurement Accuracy | ±2% |
| Rated Insulation Voltage | 400V |
| Output Contact | 1 NO (Normally Open) |
| Electrical Life | 100,000 operations |
| Mechanical Life | 1,000,000 operations |
| Installation | 35mm DIN Rail |
| Origin | Mainland China |
What's in the Box
- 1× Over/Under Voltage Relay Protector with KWH Energy Meter Display
Safety Notice
This device operates with high-voltage AC circuits. Installation should be performed by a qualified electrician in compliance with local electrical codes. For guidance on electrical safety standards, refer to the OSHA Electrical Safety guidelines.
Note: Due to lighting and monitor differences, the product color may vary slightly from images. Please allow 1mm–1cm tolerance due to manual measurement.
Frequently Asked Questions
Q: What is the difference between the 40A and 63A versions of this voltage relay protector?
A: Both versions share the same features and adjustable settings, but differ in maximum rated current capacity. The 40A model is suited for standard household circuits and smaller appliances, while the 63A model handles heavier loads such as large industrial equipment or high-draw machinery. Check the product label on your unit to confirm the rated current.
Q: Can I set the protector to only monitor energy consumption without enabling the voltage/current protection?
A: Yes. Each protection function — over-voltage, under-voltage, over-current, and KWH limit — can be individually set to "OFF," allowing you to use the device purely as a wattmeter and KWH energy meter display without triggering any automatic disconnection.
Q: How does the automatic recovery feature work?
A: When a fault condition (over-voltage, under-voltage, or over-current) is detected, the relay trips and disconnects the load after a 0.5-second delay. Once the voltage or current returns to within safe levels, the device waits for the user-programmed reset delay (1 to 600 seconds) before automatically reconnecting power, protecting your equipment from repeated voltage fluctuations.
Q: Is this relay protector compatible with both 50Hz and 60Hz electrical systems?
A: Yes, this unit supports both 50Hz and 60Hz rated frequencies, making it compatible with electrical systems in a wide range of countries and regions.