Tuya WiFi Smart Circuit Breaker User Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your EARU Tuya WiFi Smart Circuit Breaker. This device integrates smart control with essential electrical protection, offering convenience and safety for your electrical circuits. Please read this manual thoroughly before installation and use.

The product is available in several models, each offering different functionalities:

• No Metering Models (EAWCBT, EAWCBT-J): Basic ON/OFF control, timer functions, remote control, and power failure memory.
• Metering Models: Includes all "No Metering" features plus energy monitoring, over-voltage protection, and under-voltage protection.
• VA Protect Models (EAKCB-T-M): Offers the most comprehensive features, including all "Metering" features, plus current limit, power limit, and temperature protection.

2. Safety Information

Always observe the following safety precautions to prevent injury or damage to the device:

• Installation should only be performed by a qualified electrician.
• Ensure the main power supply is turned off before any installation or wiring.
• The device requires a live line (L) and a neutral line (N) for proper operation. Power must enter from the top.
• Do not operate the device if it appears damaged.
• This device is designed for indoor use only.
• Ensure proper grounding where applicable.

3. Specifications

4. Installation Guide

The smart circuit breaker is designed for 35MM Din Rail installation. Follow these steps carefully:

1. Power Off: Before starting any electrical work, ensure the main power supply to the circuit is completely turned off at the main breaker panel.
2. Mounting: Mount the device onto a standard 35MM Din Rail. Ensure it is securely fastened using the built-in clips.
3. Wiring:
   • Connect the incoming Live (L) and Neutral (N) wires to the "IN" terminals at the top of the device.
   • Connect the outgoing Live (L) and Neutral (N) wires to the "OUT" terminals at the bottom of the device.
   • Important: Power must enter from the top and must be a live line + neutral (L+N). Incorrect wiring can damage the device or cause electrical hazards.
   • The device features single-channel tunnel-type wiring ports for secure connections.
4. Power On: Once wiring is complete and secure, restore power to the circuit. The device should power on and indicate its status.

5. Operating Instructions

5.1 App Installation and Pairing

1. Download the "Tuya Smart" or "Smart Life" app from your device's app store (available for Android and iOS).
2. Register or log in to your account.
3. Ensure your mobile device is connected to a 2.4GHz Wi-Fi network (5GHz networks are not supported).
4. In the app, tap the "+" icon to add a new device.
5. On the circuit breaker, long-press the ON/OFF button for 5 seconds until the Wi-Fi indicator light starts blinking rapidly, indicating pairing mode.
6. The app should automatically detect the device. If not, select "Electrical" -> "Smart Rail On/Off Switch" or similar from the device list.
7. Follow the on-screen prompts to connect the device to your Wi-Fi network.

5.2 Basic Control

• Manual ON/OFF: Press the physical button on the device to manually turn the circuit on or off.
• App Control: Use the Tuya Smart/Smart Life app to remotely turn the circuit on or off from anywhere with an internet connection.

5.3 Timer Functions

The device supports various timing modes:

• Schedule: Set specific times for the device to switch on or off on selected days of the week.
• Countdown: Set a countdown timer after which the device will change its state (ON to OFF or OFF to ON).
• Sunrise/Sunset: Automate actions based on local sunrise or sunset times.
• Circulate: Configure the device to turn on/off repeatedly within a specified timing range for multiple cycles.

5.4 Energy Monitoring (Metering & VA Protect Models)

These models provide real-time monitoring of electricity consumption, including kWh, voltage, current, power, and temperature. You can view daily, monthly, and yearly statistics within the app.

5.5 Protection Settings (Metering & VA Protect Models)

For models with protection features, you can set various thresholds in the app:

• Over-Voltage Protection: Adjustable range of 220V-265V.
• Under-Voltage Protection: Adjustable range of 76V-240V.
• Over-Current Alarm (VA Protect): Adjustable range of 1A-63A.
• High Power Alarm (VA Protect): Adjustable range of 1KW-26KW.
• Temperature Protection (VA Protect): Adjustable range of 40℃-150℃.

When a set threshold is exceeded, the device will automatically trip to protect your circuit. The tripping switch can be turned on or off in the app settings.

5.6 Voice Control

The device is compatible with Google Assistant and Amazon Alexa. Link your Tuya Smart/Smart Life account to your voice assistant app to control the circuit breaker with voice commands (e.g., "Alexa/Google, turn on the living room light").

5.7 Power Failure Memory

The device retains its last state (ON/OFF) after a power failure and automatically returns to that state when power is restored.

6. Maintenance

• Cleaning: Ensure the device is powered off before cleaning. Use a dry, soft cloth to wipe the exterior. Do not use liquid cleaners or solvents.
• Regular Checks: Periodically check the wiring connections to ensure they are tight and secure.
• Firmware Updates: The Tuya Smart/Smart Life app may prompt you for firmware updates. It is recommended to keep the device firmware updated for optimal performance and security.
• Material: The device is made of PC flame-retardant material, offering high heat resistance and insulation for safe and reliable use.

7. Troubleshooting

• Device not pairing with app:
  • Ensure your Wi-Fi network is 2.4GHz. 5GHz networks are not supported.
  • Check if the Wi-Fi indicator light on the device is blinking rapidly (pairing mode). If not, long-press the ON/OFF button for 5 seconds.
  • Ensure your phone is close to the device and connected to the same 2.4GHz Wi-Fi network during pairing.
  • If the app fails to install or connect, try restarting your router and the device, then attempt pairing again.
• Device not responding to app commands:
  • Check your Wi-Fi connection. The device requires a stable internet connection to receive commands.
  • Verify the device is powered on and the indicator light is solid blue (connected).
  • Ensure the app is updated to the latest version.
• Device not working on output after connection:
  • Double-check the wiring according to the installation guide. Ensure Live (L) and Neutral (N) are correctly connected and power enters from the top.
  • Verify that the device is switched ON, both manually and via the app.
  • If using a Metering or VA Protect model, check the alarm settings in the app. An active protection (e.g., over-current, over-voltage) might have tripped the breaker.
• Device trips frequently (Metering & VA Protect models):
  • Review the alarm settings in the app (Over-Voltage, Under-Voltage, Over-Current, High Power, Temperature Protection). The thresholds might be set too low for your connected load.
  • Ensure the connected load does not exceed the rated current of the device.
  • If temperature protection is active and tripping, ensure adequate ventilation around the device.

8. User Tips

• Temperature Monitoring: For VA Protect models, the adjustable temperature protection (40℃-150℃) is a key safety feature. If the device frequently trips due to high temperature, investigate the cause of overheating in your electrical setup.
• Router Reset: While the device can turn power on/off, using it for frequent router resets (e.g., every 30 seconds) might not be ideal. Consider dedicated network monitoring solutions for such tasks, though a scheduled power cycle is possible.
• Energy Consumption Tracking: Utilize the energy monitoring features (on Metering and VA Protect models) to track consumption. This can help identify power-hungry appliances and manage energy usage effectively.
• App Language: The Tuya Smart and Smart Life apps typically support multiple languages, including Spanish. Check the app settings for language options.
• Circuit Breaker Functionality: The smart circuit breaker functions as a classic circuit breaker, providing essential protection against overloads and short circuits, in addition to its smart features.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.