1. Introduction
The AT4PW 100A Tuya WIFI Din Rail Smart Switch is a versatile digital power energy meter designed for remote control and monitoring of electrical parameters. It features a 2.4-inch TFT-LCD HD color display, providing real-time data on voltage, current, power, energy consumption (KWh), frequency, and power factor. This device integrates with Tuya and Smart Life mobile applications, allowing users to remotely manage power, set schedules, and receive alarm notifications for various electrical conditions. It is designed for easy installation on a standard 35mm DIN rail.
2. Safety Information
- Ensure all electrical connections are made by a qualified electrician.
- Disconnect power before installation or maintenance.
- Do not exceed the maximum rated current of 100A.
- The device is designed for single-phase AC circuits (AC85-265V).
- The device is not intended for use as a main circuit breaker for a house.
- The WIFI version includes a built-in relay.
- The device has power-off memory for data, but not for switch mode (relay closes on power-on).
3. Package Contents
Please verify that all items are present and in good condition:
- AT4PW 100A Tuya WIFI Din Rail Smart Switch
- Instruction Manual (this document)
4. Specifications
| Attribute | Value |
|---|---|
| Brand Name | ATORCH |
| Model Number | AT4PW |
| Rated Voltage | L+N 85-265V 50-60HZ (AC85-265V) |
| Rated Current | 0-100A |
| Max Operating Current | 80A - 99A |
| Rated Power | 0-26.5KW |
| Measuring Energy Range | 0-99999KWH |
| Accuracy Class | 1% |
| Phase | Single phase |
| Display Type | 2.4 inch TFT-LCD HD Color Screen (240X320 RGB Dot-matrix) |
| Power Supply | AC |
| Operating Temperature | -20°C~+60°C |
| Dimensions | 76x76x97mm |
| Installation | 35mm DIN Rail |
| Over voltage protection | 90V-250V Adjustable |
| Under voltage protection | 90V-300V Adjustable |
| Over current Protection | 10A-100A Adjustable |
| Function | WiFi remote control, over current protection, short current protection, over voltage and under voltage protection, Electricity unit price setting, electricity cost statistics, including relay circuit breaker. |
| Battery Included | No |
| High-concerned chemical | None |
| Certification | CE, RoHS |
5. Setup
5.1 Physical Installation
- Mounting: The AT4PW is designed for universal 35mm standard DIN rail mounting. No screws are required for installation, making it convenient.
- Wiring: Connect the device according to the wiring diagram provided. Ensure correct connection of L-IN (Line Input), L-OUT (Line Output), N-IN (Neutral Input), and N-OUT (Neutral Output).
Note: Since the software resets the internal magnetic latching relay switch once during power on and startup of the equipment, the output must be connected to the equipment switch, and the power supply to the equipment must be controlled by the switch after the start of the meter is completed!
5.2 App Installation and Pairing
- Download App: Download the 'Smart Life' or 'Tuya' application from Google Play (Android) or Apple App Store (iOS).
- Power On: Power on the meter. The WIFI indicator will flash.
- Add Device: Open the 'Smart Life' or 'Tuya' app. Click '+' to add a device. The app may automatically discover the device. If not, scan the QR code displayed on the meter's screen or manually add it.
- WiFi Pairing: Enter your Wi-Fi account password to complete the pairing process. Ensure your phone's location and Bluetooth are turned on. The device supports 2.4G Wi-Fi networks only.
6. Operating Instructions
6.1 Display Overview
The 2.4-inch TFT-LCD HD color screen displays various electrical parameters and status indicators:
- Main Measurement Display Area: Shows real-time Voltage (V), Current (A), Power (W), and Energy (KWh).
- Indicators: Power Indicator, Bluetooth signal indicator (Bluetooth version only), WIFI signal indicator (WIFI version only).
- Additional Data: AQI, PM2.5, Humidity, Air Temperature, and Calendar data are obtained via the Internet.
6.2 Key Button Operation
The device features three buttons for navigation and settings:
- '+' and '-' Buttons:
- Short press to switch between different functional test interfaces.
- Long press to turn the device ON or OFF.
- 'M' Button:
- Long press to enter the background settings menu.
- In the background menu, short press 'M' to switch to the next option.
- Use '+' or '-' to set numerical values or switch between Chinese/English interface display.
6.3 Remote Control via Mobile App
The mobile app allows for comprehensive remote control and monitoring:
- Remote ON/OFF: Turn the device on or off from anywhere with an internet connection.
- Real-time Monitoring: View current voltage, current, power, and energy consumption.
- Power Graph: Access historical power consumption data presented in a graph (e.g., hourly, daily, monthly, yearly).
6.4 Scheduling and Timing Functions
Set switching times for connected electrical appliances without manual operation. This includes:
- Timing: Schedule specific ON/OFF times.
- Countdown: Set a countdown timer for the device to turn off.
6.5 Prepayment Function
The device supports a prepayment function where you can set a KWh consumption limit. Once the limit is reached, the device will alarm and shut down. You can top-up the balance via the app.
- Navigate to 'Expense management' in the app.
- Enable 'Prepayment switch'.
- Set the 'Balance energy' (KWh) and confirm.
- You can view 'Prepaid phone records' and 'Clear energy'.
7. Maintenance
7.1 Firmware Upgrade
New firmware versions may be released periodically to improve functionality and performance. To upgrade the firmware:
- Open the mobile app (Tuya or Smart Life).
- Navigate to the device settings.
- Look for 'device upgrade' or 'firmware update' option (usually in the upper right corner).
- Follow the on-screen instructions to update the firmware.
7.2 Cleaning
Wipe the device with a dry, soft cloth. Do not use abrasive cleaners or solvents.
8. Troubleshooting
8.1 Alarm Event Notification Settings
The device provides security alarm prompts for over-voltage, over-current, and under-voltage conditions. These alarms can trigger automatic power-off and send notifications to your mobile phone.
- Set up Alarms: In the app, navigate to 'Smart' or 'Automation'.
- Click '+' to create a new scene/automation.
- Select 'When device status changes'.
- Choose your AT4PW device and select the fault type (e.g., 'over voltage alarm').
- Set the threshold for the alarm (e.g., 220V for over-voltage, 240V for under-voltage, 100A for over-current).
- Add an action, such as 'Send notification' to 'Message Center'.
- Save the automation.
8.2 Common Issues and Solutions
| Issue | Possible Cause / Solution |
|---|---|
| Timers stopped working | Ensure the device has a stable Wi-Fi connection. Check app settings for any conflicts or disabled schedules. Re-create timers if necessary. |
| Data not saved after power failure | The device's data has power-off memory. If data is lost, ensure the device is properly connected to the cloud. Some users report this issue; ensure firmware is up to date. |
| Device not connecting to Wi-Fi / router | Ensure your Wi-Fi network is 2.4G. Check Wi-Fi signal strength. Verify Wi-Fi password. Restart the device and router. Ensure phone location and Bluetooth are enabled during pairing. |
| WIFI indicator flashing, but Bluetooth not displayed | This is normal for the WIFI version. The Bluetooth indicator is only active on Bluetooth versions of the product. |
| Incompatibility with 5G network | The AT4PW WIFI version only supports 2.4G Wi-Fi networks. Connect to a 2.4G network. |
| Device does not measure solar panel return energy | This device is primarily designed for monitoring consumption and does not specifically measure or separately count return energy from solar systems. |
| Cannot use as main breaker for a house | The device is not certified or designed to function as a main circuit breaker for an entire house. It is intended for individual circuit monitoring and control. |
| Automatic reset after protection trips | The device's relay closes upon power-on. For automatic reset after a protection trip, check app settings for an auto-reclose function or manual intervention may be required. |
| Voltage statistics in app | The app provides real-time voltage readings and historical data in graph format. |
| Compatibility with 2-phase (110V+110V) or Phase+Phase wiring | The device is single-phase (L+N 85-265V). For 2-phase systems (e.g., 110V+110V or phase+phase), ensure the total voltage and current are within the device's rated specifications and consult a qualified electrician for proper connection. |
| Works with USA 60Hz frequency | Yes, the device supports 50-60Hz frequency. |
9. User Tips
- Data Access: AQI, PM2.5, humidity, air temperature, and calendar data are retrieved via the internet. Ensure a stable internet connection for these features.
- App Compatibility: The device is compatible with both Tuya APP and Smart Life APP, available on Android (Google Play) and iOS (Apple App Store).
- Shunt: The device has a built-in 100A shunt, eliminating the need for an external Current Transformer (CT).
- Multi-Tariff Metering: The app allows setting up to 3 different electricity rates for cost calculation.
- Remote Access: You can control and monitor the device from anywhere, even without Wi-Fi around the device, as long as your phone has a communication signal and the device is connected to the cloud.
- Security: The device offers over-voltage, under-voltage, and over-current protection, which can be configured to automatically power off the load and send notifications.
10. 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.
