1. Product Overview
The Tuya WiFi 3P4W Photovoltaic Meter is an intelligent reclosing protector designed to integrate multiple protection functions for electrical systems. It features an LCD display for real-time data monitoring and can be controlled remotely via a mobile application. This device automatically cuts off power supply in case of over-voltage, under-voltage, or over-current, and recloses once the fault is cleared, safeguarding electrical equipment.
Figure 1: Front view of the Tuya WiFi 3P4W Photovoltaic Meter. The LCD displays voltage readings for L1, L2, and L3.
Key Features:
- Premium Material: Housing made of flame-resistant material with built-in intelligent Tuya chips for durability and interference resistance.
- Digital LCD Display: Displays real-time voltage and current data simultaneously for clear monitoring.
- Automatic Reclosing Protection: Automatically cuts off power during faults (overvoltage, undervoltage, overcurrent) and restores power once the fault is resolved.
- Multi-protections: Includes overvoltage, undervoltage, current limit, phase-break, zeroloss, phase sequence, voltage unbalance, and current unbalance protections.
- Mobile App Control: Remote monitoring and control of thresholds and switching via the Tuya mobile application.
- Easy Wiring: Large wiring port design simplifies the installation process.
- Easy Installation: Compact size with DIN rail type snap installation, requiring no screws.
Figure 2: The device offers comprehensive multi-protections, consolidating functions typically requiring multiple separate devices.
2. Specifications
| Parameter | Value |
|---|---|
| Brand Name | meterk |
| Voltage Range | 80-380V |
| Current Rating | 100A |
| Rated Frequency | 50Hz |
| Connection Method | WiFi + Tuya APP |
| Operating Temperature | -20℃ to 60℃ |
| Item Size (L*W*H) | 89 * 75 * 75mm (3.50 * 2.95 * 2.95in) |
| Item Weight | 450g (0.99lb) |
| Battery Included | No |
| Origin | Mainland China |
Figure 3: Product dimensions for installation planning.
3. Setup and Installation
Safety First: Before installation, ensure the main power supply is turned off to prevent electric shock. Installation should be performed by a qualified electrician if you are unsure.
3.1 Mounting the Device
- The device is designed for DIN rail type snap installation.
- Align the device with the DIN rail in your distribution box or mounting location.
- Press firmly until it snaps securely into place. No screws are required for fixation.
Figure 4: Rear view of the device, highlighting the DIN rail snap mechanism.
3.2 Wiring
- Utilize the large wiring port design for easier and quicker connections.
- Connect the three-phase four-wire (3P4W) system to the designated terminals on the device. Refer to local electrical codes and wiring diagrams for correct phase and neutral connections.
- Ensure all connections are tight and secure to prevent loose contacts and potential hazards.
Figure 5: Detail of the easy wiring ports and LCD display.
3.3 App Connection (Tuya APP)
- Download the "Tuya Smart" or "Smart Life" application from your mobile phone's app store (iOS or Android).
- Register or log in to your Tuya account.
- Power on the device. The WiFi indicator on the device should start blinking, indicating it's in pairing mode.
- In the Tuya app, tap "+" to add a new device.
- Follow the in-app instructions to connect the device to your WiFi network. You may need to select the device type (e.g., "Electricity Meter" or "Circuit Breaker").
- Once connected, the WiFi indicator on the device will become solid.
Figure 6: Mobile app control interface for the smart meter.
4. Operating Instructions
4.1 Local Operation (Physical Buttons)
- The device features physical buttons for direct control and setting adjustments.
- Use the Up and Down buttons to navigate through display menus or adjust values.
- The OK button is used to confirm selections or enter settings.
- The Settings (Gear icon) button allows access to configuration menus where you can customize protection thresholds (e.g., overvoltage, undervoltage, overcurrent).
- The LCD display shows real-time voltage (U), and individual phase voltages (L1, L2, L3).
Figure 7: Physical buttons for direct control and threshold customization.
4.2 Remote Operation (Tuya APP)
- Open the Tuya Smart or Smart Life app on your mobile device.
- Select your Tuya WiFi 3P4W Photovoltaic Meter from the device list.
- The app interface will display real-time data, including voltage, current, and energy consumption.
- You can remotely set or modify protection thresholds (overvoltage, undervoltage, overcurrent, etc.).
- The app allows you to remotely switch the power on or off, providing convenience when you are away from home.
- Monitor historical data and receive alerts for protection events.
Figure 8: Remote control and monitoring via the Tuya app.
4.3 Protection Functions
The device provides comprehensive protection against various electrical anomalies:
- Overvoltage Protection: Automatically disconnects power if voltage exceeds a set threshold.
- Undervoltage Protection: Disconnects power if voltage drops below a set threshold.
- Current Limit Protection: Prevents damage by cutting off power if current exceeds the maximum allowed.
- Phase-Break Protection: Detects and reacts to the loss of one or more phases in a three-phase system.
- Zeroloss Protection: Monitors for neutral line integrity.
- Phase Sequence Protection: Ensures correct phase rotation.
- Voltage Unbalance Protection: Protects against significant voltage differences between phases.
- Current Unbalance Protection: Guards against excessive current differences between phases.
In the event of a protection trip, the device will automatically reclose and restore power once the fault condition is no longer present.
5. Maintenance
- Regular Cleaning: Keep the device clean and free from dust. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Connection Checks: Periodically inspect wiring connections to ensure they remain tight and secure. Loose connections can lead to overheating or intermittent operation.
- Firmware Updates: Check the Tuya app regularly for any available firmware updates for your device to ensure optimal performance and security.
- Environmental Conditions: Ensure the device operates within the specified temperature range (-20℃ to 60℃) and avoid exposure to excessive moisture or direct sunlight.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on. | No power supply; incorrect wiring. | Check main power supply. Verify wiring connections are correct and secure. |
| WiFi indicator not blinking/connecting. | Incorrect pairing mode; WiFi signal too weak; incorrect WiFi password. | Ensure device is in pairing mode (refer to app instructions). Move device closer to router. Re-enter WiFi password in app. |
| Device trips frequently. | Overvoltage, undervoltage, or overcurrent condition; incorrect threshold settings. | Check electrical load and supply voltage. Adjust protection thresholds via physical buttons or Tuya app if necessary, ensuring they are within safe operating limits. Consult an electrician if issues persist. |
| Remote control not working. | No internet connection on phone or device; Tuya app issue. | Check phone's internet connection. Verify device is connected to WiFi (solid WiFi indicator). Restart Tuya app. |
7. User Tips
- Initial Setup: During initial setup, ensure your mobile device is connected to a 2.4GHz WiFi network, as some smart devices may not support 5GHz networks.
- Threshold Customization: Take advantage of the customizable protection thresholds. Adjust them based on the specific requirements and stability of your electrical system to prevent unnecessary trips while maintaining safety.
- Remote Monitoring: Regularly check the Tuya app for real-time data and historical records to understand your power consumption patterns and identify potential issues early.
- Application: This device is particularly useful for protecting high-power appliances like electric heaters, ovens, water heaters, refrigerators, and air conditioners, which are prone to various electrical faults.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
For further assistance with the Tuya application, refer to the in-app help section or the official Tuya Smart website.
