1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Sonew ZXB3 125W 3P 63A WiFi Metering Circuit Breaker. This smart device offers remote control, timed switching, advanced leakage protection, and power metering capabilities via the Tuya APP, designed for AC 400V electrical systems.
2. Safety Information
Please read all safety warnings and instructions carefully before installing or operating this device. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Qualified Personnel Only: Installation and wiring must be performed by a qualified electrician in accordance with all local and national electrical codes.
- Power Disconnection: Always disconnect power at the main circuit breaker before performing any installation, wiring, or maintenance.
- Voltage Check: Ensure the supply voltage matches the device's rated voltage (AC 400V).
- Proper Grounding: Ensure the electrical system is properly grounded.
- Environmental Conditions: Do not install in environments with excessive moisture, dust, or corrosive gases. The device features an insulated structure and anti-interference design for humid environments, but direct exposure to water should be avoided.
- Overload Protection: Do not exceed the rated current of 63A.
3. Product Overview
The Sonew ZXB3 125W is a 3-pole smart circuit breaker designed for advanced electrical management. It integrates WiFi connectivity for remote control and monitoring.
3.1. Components
- Main Body: The circuit breaker unit with terminals for power input and load output.
- Antenna: For WiFi connectivity.
- Antenna Base: To mount the antenna.
- Terminal: Additional terminal for specific connections (e.g., RS485).
- Manual Switch Levers: Red levers for manual ON/OFF control.
- Signal Light: Indicates network status.
- Power Meter Display: Shows kWh, W, A, V readings.
Figure 3.1: Front view of the Sonew ZXB3 125W WiFi Metering Circuit Breaker, showing the main body, manual switch levers, power meter display, signal light, and attached antenna.
3.2. Status Indicators
The device features a visualization window to indicate the circuit status:
- Red Indicator: When the switch is in the UP position, the circuit is connected and in use.
- Green Indicator: When the switch is in the DOWN position, the circuit is disconnected (closed).
Figure 3.2: Visualization window indicating circuit status. Red signifies the circuit is connected, and green signifies it is disconnected.
4. Specifications
| Feature | Specification |
|---|---|
| Model | ZXB3 125W |
| Rated Voltage | AC 400V 50/60Hz |
| Rated Current (In) | 63A |
| Frame Pole Current | 125A |
| Number of Poles | 3 |
| Mechanical Life | 10,000 times |
| Electrical Life | 6,000 times |
| Overvoltage Action Range | AC 240-300V |
| Overvoltage Recovery (Uvor) | AC 220-250V |
| Undervoltage Action Range | AC 140-190V |
| Undervoltage Recovery (Uvur) | AC 170-220V |
| Undervoltage Operation Delay | 0.5-6 seconds |
| Installation | Standard 35.5 x 75 mm DIN Rail Mount |
| RS485 Communication Baud | 9600 |
| Communication Address Range | 1-247 |
| Material | Flame Retardant PC |
| Product Dimensions (L x W x H) | 16 x 13 x 11 cm (6.3 x 5.1 x 4.3 inches) |
| Weight | 530 grams (1.17 lbs) |
| Country of Origin | China |
Figure 4.1: Device dimensions, showing a height of 100mm (3.9 inches) and a width of 72mm (2.8 inches).
5. Setup & Installation
5.1. Package Contents
Verify that all items are present in the package:
- 1 x WIFI Metering Circuit Breaker (ZXB3 125W)
- 2 x Antenna
- 1 x Antenna Base
- 1 x Terminal
- 1 x Instruction Manual
5.2. Physical Installation
- Power Off: Ensure the main power supply to the installation area is completely disconnected.
- Mounting: Mount the circuit breaker onto a standard 35.5 x 75 mm DIN rail. Ensure it is securely fastened.
- Antenna Connection: Connect the provided antenna to the designated port on the circuit breaker.
5.3. Wiring
Connect the input power and load wires to the appropriate terminals on the circuit breaker. Refer to the wiring diagram on the device for correct connections. Ensure all connections are tight and secure.
5.4. Tuya APP Connection
To enable smart features, connect the device to the Tuya Smart APP:
- Download & Install Tuya APP: Download the Tuya Smart APP from your mobile device's app store (iOS or Android). Register and log in to your account.
- Power On: Restore power to the circuit breaker.
- Enter Pairing Mode: After connecting the circuit, press the blue button on the device for 5 seconds. The indicator light will turn into a fast flashing state, indicating it is ready for network connection.
- Add Device in APP: Open the Tuya APP. Click on the '+' icon in the top right corner to add a device.
- Select Device Type: Choose 'Add Manually' and select the 'Breaker (WiFi)' version from the electrical category.
- Confirm Flashing: Confirm that the indicator light on the device is flashing rapidly in the APP.
- Connect to WiFi: Select your 2.4GHz WiFi network and enter the password. The device will then connect to the network.
- Device Added: Once connected, the device will appear in your Tuya APP.
Figure 5.1: Visual guide for connecting the circuit breaker to the Tuya Smart APP, showing steps from app download to device pairing.
6. Operating Instructions
6.1. Manual Control
The circuit breaker can be manually operated using the red switch levers:
- ON: Push the red lever(s) upwards to connect the circuit and supply power. The visualization window will show red.
- OFF: Push the red lever(s) downwards to disconnect the circuit and cut power. The visualization window will show green.
6.2. Remote Control via Tuya APP
Once connected to the Tuya APP, you can remotely control and monitor the circuit breaker:
- Switching: Tap the switch icon in the APP to turn the circuit ON or OFF from anywhere.
- Monitoring: View real-time power consumption (kWh), current (A), voltage (V), and power (W) directly in the APP.
6.3. Timed Switching
Use the timer function in the Tuya APP to schedule automatic ON/OFF operations:
- Navigate to the device settings in the Tuya APP.
- Select the 'Timer' or 'Schedule' option.
- Set desired times for the circuit breaker to turn ON or OFF.
6.4. Voice Control
The device is compatible with most smart AI speakers (e.g., Amazon Alexa, Google Assistant) when integrated through the Tuya APP. Follow the instructions provided by your smart speaker manufacturer to link your Tuya account.
6.5. Advanced Leakage Protection
The smart leakage switch provides enhanced safety:
- The insulated structure and anti-interference design ensure maximum safety, even in humid environments.
- In the event of a leakage, the device will rapidly cut off the power within 0.04 seconds.
6.6. Prepaid Automatic Limiting Function
This function continuously monitors energy consumption over 24 hours. If a predefined payment threshold is exceeded or a payment delay occurs (requires specific setup in the Tuya APP, if available), the circuit breaker will automatically trip and cut off the power supply.
7. Maintenance
The Sonew ZXB3 125W circuit breaker is designed for minimal maintenance. However, regular checks are recommended:
- Visual Inspection: Periodically inspect the device for any signs of physical damage, loose connections, or overheating.
- Cleaning: Ensure the device is clean and free from dust. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Functionality Test: Occasionally test the manual ON/OFF function to ensure proper operation.
- Firmware Updates: Check the Tuya APP for any available firmware updates for the device to ensure optimal performance and security.
Important: Always disconnect power before performing any maintenance or inspection.
8. Troubleshooting
If you encounter issues with your Sonew ZXB3 125W circuit breaker, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | No power supply; incorrect wiring; device fault. | Check main power supply. Verify wiring connections. If problem persists, contact support. |
| Cannot connect to Tuya APP. | Incorrect WiFi password; 5GHz WiFi network; device not in pairing mode; weak WiFi signal. | Ensure correct 2.4GHz WiFi password. Confirm device is flashing rapidly. Move device closer to router. Reset device and try pairing again. |
| Circuit breaker trips frequently. | Overload; short circuit; leakage; undervoltage/overvoltage; prepaid limit reached. | Reduce load on the circuit. Check for electrical faults. Inspect for leakage. Review voltage settings. Check prepaid function status in APP. |
| Remote control not working. | No internet connection; device offline in APP; poor WiFi signal. | Check your home internet connection. Verify device status in Tuya APP. Ensure strong WiFi signal to the device. |
| Power metering values are incorrect. | Incorrect wiring; device malfunction. | Verify wiring according to the diagram. If issue persists, contact support. |
If the problem cannot be resolved using the above solutions, please contact Sonew customer support.
9. Warranty & Support
This product is covered by a standard return policy, typically 30 days from the date of purchase, for refund or replacement. For specific warranty terms and conditions, please refer to your purchase documentation or contact the retailer.
Customer Support
For technical assistance, troubleshooting, or warranty claims, please contact Sonew customer support through the retailer where the product was purchased or visit the official Sonew website for contact information.
