1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of the CIZVVEOC GCQ2-63/2P Dual-Power Automatic Transfer Switch. This device is designed to automatically switch between a primary power source and a backup power source, ensuring continuous power supply for various applications, including household and large-scale electrical systems.
The GCQ2-63/2P features a professionally designed circuit board for enhanced adaptability to temperature and humidity, and improved anti-interference capabilities. This design minimizes the risk of misoperation and switching failures in complex or harsh environments, offering reliable performance and broad compatibility.
2. Safety Information
WARNING: Electrical shock hazard. Installation and maintenance should only be performed by qualified personnel.
- Always disconnect power from both the primary and backup sources before installing or servicing the transfer switch.
- Ensure all wiring connections are secure and comply with local electrical codes and regulations.
- Do not operate the switch if it appears damaged or if any components are missing.
- Wear appropriate personal protective equipment (PPE) when working with electrical systems.
- Verify the voltage and current ratings of the switch are compatible with your electrical system.
3. Product Specifications
| Product Model | GCQ2-63/2P |
| ATS Level | CB Level |
| Rated Current | 63A |
| Operation Mode | Automatic / Manual |
| Working Frequency | 50Hz/60Hz |
| Rated Voltage | AC400V |
| Working Voltage | AC220V/110V (Optional) |
| Conversion Time | ≤ 2 seconds |
| Use Level | AC-33iB |
| Conversion Method | Self-switching |
| Display Function | Indicator Display |
4. Setup and Installation
Before beginning installation, ensure all power sources are disconnected. This device is designed for wall mounting. Refer to the wiring diagram below for proper connections.

Figure 4.1: Wiring Diagram
This diagram illustrates the connection points for the common power supply, emergency power supply, and the load. Ensure correct polarity and secure connections for safe operation.
4.1 Wiring Connections
- Common Power Supply (N): Connect the primary power source to the terminals labeled "N" on the left side of the switch.
- Backup Power Supply (R): Connect the secondary or emergency power source to the terminals labeled "R" on the right side of the switch.
- Load: Connect the electrical load (devices or circuits to be powered) to the output terminals at the bottom of the switch, labeled "Load".
- Control Wiring: Ensure the small control wires are correctly connected as indicated in the diagram for automatic operation.
After all connections are made, double-check for any loose wires or incorrect wiring before restoring power.

Figure 4.2: Front View of the Transfer Switch
This image shows the main components including the power input terminals, output terminals, and the manual/automatic selector switch.
5. Operating Instructions
The CIZVVEOC GCQ2-63/2P transfer switch offers both automatic and manual operation modes.
5.1 Automatic Mode
To operate the switch in automatic mode, ensure the selector handle is set to the "Auto" position. In this mode, the switch will automatically detect the presence of the primary power source. If the primary power fails, the switch will automatically transfer the load to the backup power source within approximately 2 seconds. When the primary power is restored, the switch will automatically transfer the load back to the primary source.
- Indicator Display: The integrated indicator lights will show which power source is currently active.
5.2 Manual Mode
The switch can be manually operated for testing or specific scenarios. To switch manually, move the selector handle to the "Manual" position. Then, physically move the handle to select either the "Normal Power" or "Backup Power" position. Always exercise caution when operating in manual mode and ensure power is managed safely.
CAUTION: Do not force the manual selector handle. Ensure the switch is in the "Manual" position before attempting to change the power source manually.
6. Maintenance
Regular maintenance helps ensure the longevity and reliable operation of your automatic transfer switch.
- Periodic Inspection: Visually inspect the switch and its connections at least once a year for any signs of wear, corrosion, or damage.
- Cleaning: Keep the switch free from dust and debris. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Connection Check: Periodically verify that all electrical connections remain tight and secure.
- Functionality Test: If safe to do so, periodically test the automatic transfer function by simulating a primary power failure (e.g., by temporarily disconnecting the primary power source, if your setup allows for safe testing).
7. Troubleshooting
If you encounter issues with your CIZVVEOC GCQ2-63/2P Automatic Transfer Switch, consider the following common troubleshooting steps:
- No Power to Load:
- Check if both primary and backup power sources are active.
- Verify all wiring connections are secure and correct according to the diagram.
- Ensure the switch is not in a manual position that prevents automatic transfer.
- Failure to Transfer Automatically:
- Confirm the selector handle is firmly in the "Auto" position.
- Check for any obstructions or debris preventing the internal mechanism from moving.
- Ensure the control wiring is intact and correctly connected.
- Overheating:
- Verify the load current does not exceed the rated current of 63A.
- Ensure adequate ventilation around the switch.
- Check for loose connections, which can cause resistance and heat.
If problems persist after performing these checks, contact a qualified electrician or the manufacturer's support for assistance. Do not attempt to repair the internal components yourself.
8. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your seller directly. CIZVVEOC stands behind the quality of its products. For technical support or further inquiries, please reach out to the manufacturer or authorized distributor.
Please have your product model (GCQ2-63/2P) and purchase details available when contacting support.





