1. Product Overview
The TOMZN TOQ6-63 Automatic Transfer Switch (ATS) is a PC class infrequent change-over switch designed for seamless power transfer between two sources. It features a two-station design, commonly used for a main power supply (Source A) and a backup power supply (Source B). This device is suitable for AC systems with a frequency of 50-60Hz and rated currents from 6A to 80A.
Its primary function is to automatically switch to the backup power supply when the main power fails, ensuring uninterrupted operation. Once the main power supply is restored, the ATS will switch back to the main power supply. The switching speed is less than 50 milliseconds, minimizing disruption.
2. Safety Information
WARNING: Electrical installation should only be performed by qualified professionals to prevent electric shock or other hazards.
- To avoid danger of suffocation, keep packaging away from babies and children. Do not use packaging in cribs, beds, carriages, or playpens. This packaging is not a toy.
- Do not place the device near flammable materials.
- Ensure adequate ventilation during operation to prevent overheating.
- Disconnect the device from all power sources before performing any inspection, maintenance, or when storing it for extended periods.
- The control circuit ATSE is immediately energized. After the changeover is completed, the internal switch will damage the coil in the control circuit, and the coil can work normally at 85%~110% of the rated operating voltage. Too low input voltage may cause the coil to overheat and burn out.
This product complies with the following regulations and harmonized standards:
- Low Voltage Directive 2014/35/EU
- Electromagnetic compatibility Directive 2014/30/EU
- Restriction of the use of certain hazardous substances (RoHS) Directive 2011/65/EU
3. Setup and Installation
Installation and wiring must be performed by a qualified electrical professional.
3.1 Pre-Installation Checks
- Upon receiving the product, verify its integrity.
- Turn on the ATS using the operating handle to check the flexibility of the operating mechanism and the opening/closing status of each phase, as well as the normal and backup power loads.
- Ensure suitable circuit breakers are installed in accordance with the power distribution system requirements to guarantee personnel and equipment safety.
3.2 Mounting
The TOQ6-63 ATS is designed for 35mm standard DIN rail installation and can be directly installed in household lighting distribution boxes.
3.3 Wiring Instructions
Connect the equipment strictly according to the wiring diagram specifications. The input power supply must be connected in the correct phase sequence.
Note on PV models:
For PV system models (TOQ6-63PV), input one has priority over input two. Ensure the main power source (e.g., Grid Power) is connected to input one, and the backup power source (e.g., PV/Inverter) is connected to input two for proper operation.
2P Wiring Diagrams (L+N 220V-230V)
4P Wiring Diagrams (L1+L2+L3+N 220V-230V)
4. Operating Instructions
The TOQ6-63 ATS offers both automatic and manual operation modes.
4.1 Automatic Operation
In automatic mode, the switch will detect the status of the main power supply (Source A) and backup power supply (Source B). If the main power fails, the ATS will automatically switch to the backup power supply within 50 milliseconds. Once the main power is restored and stable (after a short delay of a few seconds to ensure stability), the ATS will switch back to the main power supply.
4.2 Manual Operation
To operate the switch manually, ensure the mode selection switch is set to the 'Manual' position. Manual operation allows for opening and closing performance of electrical operation, but does not guarantee the same switching speeds as automatic operation.
CAUTION:
- Manual operation may lead to excessive silver operation or silver alloy loss. Therefore, the selector switch should only be moved to the manual position after all power has been cut off for inspection and maintenance.
- Normally, keep the selector switch in the 'Auto' position. Only use manual mode when necessary. After manual operation is complete, return the selector switch from the manual position to the 'Auto' position.
5. Maintenance
Maintenance and inspection should only be carried out by qualified professionals.
5.1 Maintenance Schedule
- The first maintenance and inspection should be performed within 6 months after initial use to ensure good performance.
- Subsequently, perform maintenance and inspection at least once a year.
- In harsh installation conditions, increase the frequency of maintenance and inspection as needed.
5.2 Maintenance Procedures
- If maintenance items fail, remove any accumulated dust.
- Check for deformed or damaged electrical contact parts and clean their surfaces.
- Address any metal particles, rust, acidification, or dust on the contact surfaces that may cause poor contact. Perform manual cleaning and measure the contact resistance if necessary.
- If the ATS becomes wet or has been unused for a long time, dry it thoroughly before turning on the power.
- After cleaning, use a 500V megohmmeter to measure the insulation resistance of the normal power supply and the AC power supply. The insulation resistance between the load side and two poles, including live parts and metal plates, should not be less than 10MΩ.
6. Troubleshooting
This section provides guidance on common issues. Always ensure power is disconnected before inspecting the device.
| Problem | Possible Cause | Solution |
|---|---|---|
| ATS does not switch to backup power when main power fails. | Incorrect wiring (main power not on input 1 for PV models), backup power supply issue, or ATS malfunction. | Verify wiring according to diagrams (ensure main power is on input 1 for PV models). Check backup power supply functionality. Consult a professional if issue persists. |
| Coil overheating or burning out. | Input voltage too low (below 85% of rated voltage). | Ensure the input voltage is within the specified range (85%Us-110%Us). |
| Poor contact or inconsistent switching. | Dust, rust, or damage to electrical contact parts. | Perform maintenance as described in Section 5.2, cleaning contacts and checking for damage. |
| ATS remains in manual mode after operation. | Mode selection switch not returned to 'Auto'. | After manual operation, always return the mode selection switch to the 'Auto' position. |
7. Specifications
The TOMZN TOQ6-63 ATS is available in 2P and 4P configurations, with models specifically designed for PV systems (TOQ6-63PV) or standard City Power/Generator applications.
| Parameter | Value |
|---|---|
| Model Number | TOQ6-63 |
| Type | Dual Power Automatic Transfer Switch (PC Class) |
| Poles Number | 2P, 4P |
| Rated Working Current (Ie) | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A |
| Rated Voltage (Ue) | AC220V/AC110V (L+N 220-240V 50-60Hz) |
| Rated Insulation Voltage (Ui) | 690V |
| Rated Impulse Withstand Voltage (Uimp) | 8kV |
| Rated Frequency | 50/60Hz |
| Rated Short-Circuit Current (Iq) | 50kA |
| Short Circuit Protection Device (Fuse) | RT16-00-63A |
| Rated Control Voltage (Us) | AC220V 50Hz |
| Normal Working Conditions (Control Voltage) | 85%Us-110%Us |
| Auxiliary Circuit | AC220V/110V 50Hz Ie=5A |
| Contactor Change-over Time | <50ms |
| Operation Change-over Time | <50ms |
| Return Change-over Time | <50ms |
| Power Off Time | <50ms |
| Mechanical Life | ≥5000 Times |
| Electrical Life | ≥1500 Times |
| Usage Category | AC-31B |
| Protection Grade | IP30 |
| Overvoltage Category | Main circuit: III, Control auxiliary circuit: II |
| Working Temperature | -5°C to +40°C (average within 24 hours < +35°C) |
| Storage Temperature | -25°C to +55°C (short time up to +70°C within 24 hours) |
| Altitude | ≤ 2000m |
| Relative Humidity | ≤ 50% at +40°C (higher at lower temperatures, e.g., 90% at +20°C) |
| Pollution Level | 3 (conductive pollution, or dry non-conductive pollution becomes conductive due to condensation) |
7.1 Dimensions
8. User Tips
- Wiring Priority for PV Models: For PV system models (TOQ6-63PV), input one has priority over input two. Ensure the main power source (e.g., Grid Power) is connected to input one, and the backup power source (e.g., PV/Inverter) is connected to input two. Incorrect wiring can lead to the ATS always switching to the solar power input even if grid power is available.
- Fast Switching: The ATS provides very fast switching (around 20 milliseconds) from grid mains to inverter power, ensuring minimal interruption.
- Stable Power Transfer: There is a short delay of a few seconds before the ATS switches back to grid power to ensure the main power supply is stable.
- Reliable Performance: Users have reported that the product works as expected and is suitable for solar and battery backup systems from inverters.
9. Warranty and Support
The TOMZN TOQ6-63 Automatic Transfer Switch is certified with CE, indicating compliance with European safety, health, and environmental protection requirements.
For detailed information, including comprehensive diagrams and further technical specifications, please refer to the official user manual PDF:
For any further assistance or technical support, please contact TOMZN customer service.