1. Introduction
This manual provides essential instructions for the safe installation, operation, and maintenance of the HONGTONGAAD G2R-63 mini Dual Circuit Power Automatic Transfer Switch (ATS). This device is designed to automatically switch between a primary power source and a backup power source, ensuring a continuous and reliable power supply for connected loads. Please read this manual thoroughly before installation and use.
2. Important Safety Instructions
- Electrical Hazard: Installation and maintenance must be performed by qualified electricians only. Ensure all power sources are disconnected before working on the device.
- Voltage: This device operates at 220V. Incorrect wiring or handling can result in severe injury or death.
- Grounding: Ensure proper grounding according to local electrical codes.
- Environment: Install the switch in a dry, well-ventilated area, free from corrosive gases, excessive dust, and extreme temperatures.
- Overload Protection: Do not exceed the rated current of 63A. Ensure appropriate circuit breakers are installed upstream to protect the device and connected loads.
3. Product Overview
The HONGTONGAAD G2R-63 mini Dual Circuit Power Automatic Transfer Switch is designed for seamless power transfer. Key features include:
- Application: Quickly switches to backup power in the event of a power failure, ensuring a safe and reliable power supply.
- Operation Modes: Supports both automatic and manual operation modes.
- Manual Control: A manual handle on the right side facilitates easy switching between different power sources.
- Clarity: Clear labeling on the housing displays parameters and wiring information.
- Installation: Designed for easy installation and wiring.
3.1 Component Identification
Refer to the image below for a visual guide to the main components of the transfer switch.

Image 1: Front view of the HONGTONGAAD G2R-63 Automatic Transfer Switch, highlighting key components such as the backup neutral wire, backup live line, common neutral wire, common fire lines, hand/automatic switch, operating switch, and load output terminal. This diagram helps in understanding the external features and connection points.
The main product view provides an overall perspective of the device.

Image 2: Overall view of the HONGTONGAAD G2R-63 mini Dual Circuit Power Automatic Transfer Switch. This image shows the compact design and general appearance of the device, including its DIN rail mounting capability and the position of the control elements.
4. Installation and Wiring
Warning: Installation must be performed by a qualified electrician. Ensure all power is disconnected before proceeding.
4.1 Mounting
The G2R-63 ATS is designed for DIN rail mounting. Securely attach the device to a standard DIN rail within an appropriate electrical enclosure.
4.2 Wiring Diagram
Follow the wiring diagram carefully to ensure correct and safe operation. Incorrect wiring can damage the device and pose a safety risk.

Image 3: Detailed wiring diagram and dimensional drawing for the HONGTONGAAD G2R-63 Automatic Transfer Switch. The diagram illustrates connections for backup neutral input, backup live wire input, common neutral input, common fireline input, load power supply, and load output. It also shows the guide rail buckle, closing instruction, and manual operation handle. The dimensional drawing provides precise measurements for installation planning. Note: Terminal connection area is suitable for (1-25) mm², and the wire connection screw is M5 with a torque of 2.5N·m.
4.3 Connection Steps
- Identify Terminals: Locate the common power input (N1, L1), backup power input (N2, L2), and load output terminals (N, L).
- Connect Common Power: Connect the neutral and live wires from your primary power source to the common power input terminals (N1, L1).
- Connect Backup Power: Connect the neutral and live wires from your backup power source (e.g., generator, UPS) to the backup power input terminals (N2, L2).
- Connect Load: Connect the neutral and live wires of your electrical load to the load output terminals (N, L).
- Secure Connections: Ensure all wire connections are tight and secure. The terminal connection area is suitable for 1-25 mm² wires. Use an M5 screw with a torque of 2.5 N·m for wire connections.
- Verify Wiring: Double-check all connections against the wiring diagram before applying power.
5. Operation
The G2R-63 ATS supports both automatic and manual operation modes.
5.1 Automatic Mode
In automatic mode, the switch will detect the presence of power from the primary source. If the primary source fails, it will automatically switch to the backup source. When the primary power is restored, the switch will revert to the primary source.
- Set the hand/automatic switch to the 'Automatic' position.
- The device will monitor both power sources and perform transfers as needed.
5.2 Manual Mode
Manual mode allows you to manually select the desired power source.
- Set the hand/automatic switch to the 'Manual' position.
- Use the manual operation handle (located on the right side) to physically switch between the common power source and the backup power source.
- Important: When performing a manual switch, ensure the handle is fully engaged in the desired position to prevent partial contact and potential damage.
6. Maintenance
Regular maintenance helps ensure the longevity and reliable operation of your ATS.
- Periodic Inspection: Annually inspect the device for any signs of physical damage, loose connections, or overheating.
- Cleaning: Keep the device free from dust and debris. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Connection Check: Periodically verify that all terminal connections remain tight.
- Professional Service: Any internal inspection or repair should only be performed by a qualified technician.
7. Troubleshooting
If you encounter issues with your G2R-63 ATS, consider the following basic troubleshooting steps:
- No Power to Load:
- Check if both primary and backup power sources are active.
- Verify that the ATS is in the correct operating mode (Automatic or Manual).
- Inspect all wiring connections for looseness or damage.
- Check upstream circuit breakers for trips.
- Switch Not Transferring:
- In automatic mode, ensure both power sources are correctly detected.
- In manual mode, ensure the handle is fully engaged in the desired position.
- If the issue persists, contact a qualified electrician for further diagnosis.
8. Specifications
Technical specifications for the HONGTONGAAD G2R-63 mini Dual Circuit Power Automatic Transfer Switch:
| Feature | Specification |
|---|---|
| Item Model Number | HONGTONGAAD (G2R-63) |
| Rated Voltage | 220V |
| Rated Current | 63A |
| Poles | 2P |
| Operation Modes | Automatic, Manual |
| Terminal Connection Area | 1-25 mm² |
| Wire Connection Screw | M5 (Torque: 2.5 N·m) |
| Package Dimensions | 0.39 x 0.39 x 0.39 inches |
| Item Weight | 2.2 Pounds |
| Manufacturer | HONGTONGAAD |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the product packaging or contact HONGTONGAAD directly through their official channels. Specific warranty terms and contact details are not provided within this manual.