SMTONOFF Smart WiFi Energy Meter and Protector User Manual

1. Overview

This all-in-one smart IoT device is designed for AC110V or 220V, 50/60Hz, rated current up to 63A single-phase circuits in residential, commercial, and industrial buildings. It features 2.4G WiFi connectivity, functioning as a smart meter to measure active energy consumption, and offering prepayment as an option. The device allows remote control and protection settings against over/under voltage, overcurrent, and residual current (leakage) via a mobile app. It also supports auto-reclosing after protected conditions recover, programmable timing control, and device sharing. Local manual control without WiFi and voice control through AI speakers (Amazon Alexa, Google Assistant, Yandex Alice) are also supported.

2. Main Specifications

3. Functional Features

• Four Control Options: Remote control via mobile app (Tuya Smart, Smart Life), Voice control (AI speakers like Alexa, Google Assistant, Yandex Alice), Timing control (programmable schedule), and Manual control via device buttons.
• Real-time Monitoring: Monitor electricity statistics (Amps, Volts, milliamps, kW, kWh) directly on your phone.
• Energy Measurement: Measures positive active energy consumption.
• Prepaid Metering: Optional prepaid metering mode available via app switch. Recharge energy (kWh) via the app. The breaker will auto-cut off if the balance energy is low.
• Adjustable Protections: Set thresholds for over/under voltage, overcurrent, and residual current (leakage).
• Overcurrent Protection: 1~63A adjustable (default 63A, can be disabled).
• Over Voltage Protection: 230~300V adjustable (default 275V, can be disabled).
• Under Voltage Protection: 90~210V adjustable (default 110V, can be disabled).
• Residual Current (Leakage) Protection: 10-100mA adjustable (default 50mA).
• Auto-reclosing: Automatically recloses after protected faults recover.
• Local Manual Setting: All settings can be adjusted directly on the device (no WiFi needed).
• Timing Schedule: Programmable via the app.
• Device Sharing: Share control of the device with family members or team members through the app.

Note:

If the protector trips 3 times due to leakage, it will not auto-reclose until the fault is fixed by the user to ensure safety.

4. Setup

4.1. Physical Installation (Wiring Diagram)

The device is designed for 35mm DIN-rail mounting. Connect the input (IN) and output (OUT) terminals as shown in the diagram below. Ensure proper connection of Neutral (N) and Live (L) wires.

4.2. App Installation and Device Pairing

1. Download and install the Tuya Smart or Smart Life app on your mobile phone and register with your phone number.
2. Power on the device. Long press the WiFi button for 10 seconds until the WiFi signal indicator flashes rapidly to enter pairing mode.
3. Open the Tuya Smart app. The app should automatically detect the new device (Breaker). If not, tap 'Add Device'.
4. Confirm the device and proceed. Select your 2.4G WiFi network and enter the password.
5. The device will be added successfully. Tap 'Done' to complete the process.

5. Operating Instructions

5.1. Manual Operation on Device

The device features a large LCD display and several buttons for local control and data viewing.

• SET Button: Short press to view data in a circular manner (real-time voltage, current, electricity consumption, leakage current). Long press to enter setup mode.
• Up/Down Arrows: Used to reduce or increase values when in data adjustment mode.
• WiFi Button: Long press until the WiFi indicator flashes to enter pairing mode (if needed).
• ON/OFF Button: Manual ON/OFF control for the breaker.

5.2. App Operation (Tuya Smart / Smart Life)

Once paired, the device can be fully controlled and monitored via the mobile app.

• Remote Control: Turn the device ON/OFF from anywhere using the app.
• Electricity Measuring: View real-time current (A), voltage (V), active power (kW), and total forward energy (kWh). Daily, monthly, and yearly statistics are available.
• Prepaid Metering: Enable or disable prepaid mode. Recharge energy (kWh) via the app. The breaker will auto-cut off if the balance energy is low.
• Adjustable Protections: Set thresholds for overcurrent, overvoltage, undervoltage, and leakage current alarms.
• Timing Schedule: Create programmable schedules to automate device operation.
• Voice Control: Integrate with AI speakers like Amazon Alexa and Google Assistant to control your devices with voice commands.
• Device Sharing: Share control of the device with family members or team members through the app.

6. Maintenance

To ensure optimal performance and longevity of your SMTONOFF Smart WiFi Energy Meter and Protector, follow these maintenance guidelines:

• Keep the device clean and free from dust and moisture. Use a dry, soft cloth for cleaning.
• Ensure all wiring connections are secure and free from corrosion. Periodically check for loose connections.
• Avoid exposing the device to extreme temperatures or direct sunlight.
• Do not attempt to open or repair the device yourself. Refer to qualified personnel for any servicing needs.
• Regularly update the Tuya Smart/Smart Life app to ensure compatibility and access to the latest features and security patches.

7. Troubleshooting

• Device not powering on / Dark screen: Check the power supply and wiring connections. If the device is damaged (e.g., broken coil), it may require replacement.
• Cannot connect to WiFi / WiFi signal not flashing: Long press the WiFi button for 10 seconds to enter pairing mode. Ensure your WiFi network is 2.4GHz. If changing routers, you will need to re-pair the device with the new WiFi network.
• Manual button not working / Only accessible via smartphone: This might indicate a software or hardware issue. Try performing a factory reset if possible (refer to app settings or long-press combinations if available).
• Device trips frequently due to leakage: If the protector trips 3 times due to leakage, it will not auto-reclose. Identify and fix the leakage fault in your electrical system before attempting to re-enable the device.
• Device does not automatically turn on after power outage: Check the app settings for auto-reclosing or power-on state configuration.
• Incorrect voltage readings (e.g., 380V vs 220V/110V): This device is designed for AC110V or 220V single-phase circuits. It is not compatible with 380V systems or phase-to-phase 220V connections if the device expects phase-to-neutral. Always verify your electrical system's voltage and configuration before installation.

8. User Tips

• Adjustable Protections: Take advantage of the adjustable overcurrent, overvoltage, undervoltage, and leakage current settings to tailor protection to your specific needs. These can be configured via the app.
• Energy Monitoring: Use the app's energy monitoring features to track daily, monthly, and yearly electricity consumption. This can help identify energy-saving opportunities.
• Prepaid Functionality: If using the prepaid metering option, ensure you maintain a sufficient balance to avoid unexpected power cut-offs.
• Safety First: Always address the root cause of any electrical faults (especially leakage) before resetting or re-enabling the protector.
• Appliance Scheduling: Utilize the timing schedule feature to automate the operation of appliances like water heaters, air conditioners, or pumps, promoting energy efficiency.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the seller or manufacturer's official website. Keep your purchase receipt as proof of purchase.

A detailed user manual in PDF format is available for download: Download User Manual (PDF)