1. Introduction
The GEYA Tuya WIFI Smart MCB GRD9L-W is a miniature circuit breaker with an integrated WiFi recloser, designed for intelligent household electricity management and photovoltaic distribution systems. It offers remote control capabilities, automatic reclosing after unexpected trips, and timing functions via the Tuya APP, enhancing efficiency and reducing manual maintenance.
1.1. Safety Information
WARNING: Electrical shock hazard. Installation and maintenance must be performed by qualified electricians only. Always disconnect power before working on electrical circuits.
- Ensure the power supply voltage matches the device's specifications.
- Do not operate the device with wet hands.
- Keep the device away from water and high humidity environments.
- Verify all wiring connections are secure and correct before applying power.
2. Package Contents
Please check the package for the following items:
- GEYA Tuya WIFI Smart MCB GRD9L-W Device
- Quick Connect Cable (Gift)
- Instruction Manual (this document)
3. Setup
3.1. Physical Installation
The device is designed for DIN rail mounting (EN/IEC 60715).
Figure 1: Installation and Use Diagram
This diagram illustrates how to install the GRD9L-W device. It shows cooperation with an RCCB (Residual Current Circuit Breaker) and an MCB (Miniature Circuit Breaker), the closing lock mechanism, and how to install accessories.
- Cooperate with RCCB: Align the GRD9L-W with the RCCB and connect them securely.
- Cooperate with MCB: Align the GRD9L-W with the MCB and connect them securely.
- Accessories Installing: Attach any compatible accessories (e.g., ARD) to the device as shown in the diagram.
- Closing Lock: The device features a closing lock function. When activated, the RCCB/MCB cannot be closed. Ensure the lock is disengaged for normal operation.
3.2. Wiring Diagram
Figure 2: Technical Parameters, Panel Diagram, and Wiring Diagram
This image provides a detailed wiring diagram for the GRD9L-W. Connect the AC220V power supply to the designated terminals. The diagram also shows auxiliary contacts (COM, NO) and control terminals (A1, A2).
Refer to Figure 2 for the correct wiring connections. Ensure all connections are tight and follow local electrical codes.
3.3. Networking Settings
Figure 3: Networking Settings
This diagram shows the QR code for downloading the Tuya Smart app and instructions for adding and reconfiguring the device.
- Install APP: Scan the QR code in Figure 3 or search for 'Tuya Smart' in your app store to download and install the application.
- Connect WiFi: Make sure your phone is connected to a 2.4GHz WiFi network (5G WiFi is not supported). Open the Tuya Smart APP, click 'Add Device', and follow the on-screen prompts to complete the device addition. The main interface of the APP will display the device icon, and the WiFi indicator on the device will be on.
- Add Device: If this is the first use, or if you need to restore factory conditions, operate the button 5 times within 5 seconds to restore the factory status and reconfigure WiFi. The device will enter the distribution network state, and the WiFi indicator will flash.
- Reconfigure WiFi:
- If you delete the device from the APP, it will restore its factory settings. You can then add it again.
- To manually reconfigure, operate the button 5 times within 5 seconds to restore factory status. The device will re-enter WiFi configuration state, indicated by a flashing WiFi indicator. You can then add it again through the APP.
4. Operating Instructions
4.1. Mode Selection
Figure 4: AUTO and MANU Mode Descriptions
This image details the functionality of the AUTO and MANU modes, and the behavior of the PWR status indicator.
- AUTO Mode: When the selector switch is in the 'AUTO' position, the auto reclosing function is enabled. Closing and opening commands can be sent through the Tuya APP.
- MANU Mode: When the selector switch is in the 'MANU' position, the auto reclosing function is disabled. Sending closing and opening commands through the APP will be invalid. The MCB/RCCB/RCBO can only be opened and closed manually.
4.2. Status Indicator (PWR LED)
- When powered on, the green light will flash for 2 seconds to wait for the power supply to stabilize.
- When the WiFi connection is normal, the green light remains on.
- When the WiFi is in a waiting configuration state, the green light flashes.
- If a trip fault occurs, the indicator light will turn red.
- During auto reclosing delay, the red indicator light will flash. After the delay, it will switch on automatically and the green light will be on.
4.3. Remote Control and Timing Functions
Via the Tuya Smart APP, you can:
- Remotely send closing and opening commands to the device.
- Set timing schedules to automatically turn the MCB ON/OFF at specified times.
4.4. Functions Diagram and Application Examples
Figure 5: Functions Diagram and Examples of Application
This image illustrates the operational sequence of the device including LED status, APP commands, and trip events. It also provides a wiring example for multiple load circuits.
5. Maintenance
The GEYA Tuya WIFI Smart MCB GRD9L-W is designed for minimal maintenance. To ensure optimal performance and longevity:
- Keep the device clean and free from dust and debris.
- Periodically check all wiring connections for tightness and signs of wear.
- Ensure the operating environment is within the specified temperature and humidity ranges.
- Do not attempt to repair the device yourself. Contact qualified personnel for service.
6. Troubleshooting
Refer to the table below for common issues and their resolutions:
| Fault Description | Resolution |
|---|---|
| Unable to close or open |
|
| Trip immediately after closing |
|
7. Specifications
7.1. Technical Parameters (GRD9L-W)
| Parameter | Value |
|---|---|
| Control mode | WiFi |
| Supply terminals | A1-A2 |
| Voltage range | AC 220V (50-60Hz) |
| Supply voltage tolerance | -10% ~ +10% |
| Power input | AC max. 1VA (standby) max. 20VA (action) |
| Action time | ≤1s |
| WiFi connectivity | 802.11 b/g/n, 2.4GHz |
| Mechanical life | 10000 |
| Electrical life | Refer to MCB / RCCB / RCBO catalogue |
| Operating temperature | -20°C to +55°C |
| Storage temperature | -35°C to +75°C |
| Mounting/DIN rail | Din rail EN/IEC 60715 |
| Protection degree | IP20 |
| Operating position | Any |
| Overvoltage category | III. |
| Pollution degree | 2 |
| Max. cable size (mm²) | Solid wire max. 1x2.5 or 2x1.5 / with sleeve max. 1x2.5 (AWG 12) |
| Dimensions | 82 x 18 x 78mm |
| Weight | 80g |
7.2. Combination with Accessories
| Accessory Type | Compatibility |
|---|---|
| Auxiliary contact | Yes |
| Alarm contact | Yes |
| Shunt release | Yes |
| Under voltage release | Yes |
7.3. Dimensions
Figure 6: Dimensions Diagram
This image provides detailed dimensions for various configurations of the GEYA circuit breakers, including 2P, 4P, 1P+N, 3P+N, and 1P-4P models.
8. User Tips
- Optimal Placement: This versatile device is suitable for multiple scenes and rooms. Consider its placement based on your specific circuit protection and remote control needs.
- Voltage Compatibility: Ensure your electrical system operates within the device's rated voltage of AC220/400V.
- WiFi Network: Always connect to a 2.4GHz WiFi network for proper functionality, as 5G WiFi is not supported.
- Remote Monitoring: Utilize the Tuya Smart app for convenient remote monitoring and control of your electrical circuits.
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.
9.1. Disposal of Electrical Waste
All electrical waste should be disposed of in compliance with current WEEE (Waste Electrical and Electronic Equipment) regulations. Do not dispose of electrical appliances as unsorted municipal waste; use separate collection facilities.