TOMZN TOQ6-63 Series Dual Power Automatic Transfer Switch User Manual

1. Product Overview

The TOMZN TOQ6-63 series automatic transfer switch (ATS) is a PC class infrequent change-over switch designed for seamless power switching. It features a two-station design, commonly used for switching between a main power supply (e.g., city power or PV grid) and a backup power supply (e.g., generator or inverter).

This device ensures an uninterrupted power supply by automatically switching to the backup source within 50 milliseconds when the main power fails, and then switching back once the main power is restored. It is suitable for AC systems with 50-60Hz frequency and rated currents up to 63A.

The TOQ6-63 series includes models for different applications:

• TOQ6-63/2P PV, TOQ6-63/4P PV: Designed specifically for PV (solar) systems and inverters.
• TOQ6-63/2P, TOQ6-63/4P: Designed for city power and generator applications.

The switch supports both manual and automatic operation modes, providing flexibility in power management.

2. Safety Information and Precautions

General Precautions:

• Do not place the device near flammable materials.
• Ensure adequate ventilation during operation to prevent overheating.
• Disconnect the device from all power sources and store it properly when not in use for extended periods.
• This product operates at high voltage (above 50Vac or 75Vdc). All installation and maintenance should be performed by qualified electrical professionals to ensure safety.

Applicable 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. Technical Specifications

The TOMZN TOQ6-63 series ATS is designed with robust features for reliable performance.

Note: If the rated working voltage is AC110V, the product needs to be customized.

Dimensions:

Working Conditions:

• Temperature Range: Operating environment: -5°C to +40°C (average temperature within 24 hours should be below +35°C). Storage environment: -25°C to +55°C (can reach +70°C for short periods).
• Altitude: Installation site should be lower than 2000m.
• Relative Humidity: Not to exceed 50% when ambient air temperature is +40°C. Higher relative humidity is possible at lower temperatures (e.g., 90% when the average minimum temperature of the wettest month is +20°C). Appropriate measures should be taken to prevent condensation due to temperature changes.
• Pollution Level: 3 (conductive pollution, or dry non-conductive pollution becomes conductive due to condensation).
• Installation: ATS can be installed vertically or horizontally in the cabinet. For special installation requirements, consult the manufacturer.

4. Installation

Before proceeding with installation, ensure you have read this manual thoroughly and that an electrical professional performs the operation.

Pre-Installation Checks:

1. Before installation and wiring, ensure that professionals are handling the task.
2. Check the integrity of the ATS. Turn on the ATS with the operating handle to check the flexibility of the operating mechanism, and verify the opening and closing status of each phase and normal/backup power loads.
3. Equip the ATS with suitable circuit breakers according to the power distribution system's installation requirements to ensure personnel and equipment safety.

Wiring Instructions:

Connect the equipment in accordance with the wiring diagram specifications. The input power supply must be connected in the correct phase sequence. When connecting wires, penetrate the insulating layer of the power lines through the L and N terminals and screw down firmly.

Terminal wiring area is suitable for wires from 1-25mm². The wire connection screws are M5, with a recommended torque of 2.5Nm.

DIN Rail Installation:

The TOMZN TOQ6-63 series ATS is designed for 35mm standard DIN rail installation, making it suitable for direct mounting in household lighting distribution boxes.

5. Operating Instructions

After the product has been received and professionally installed according to the wiring diagrams and specifications, adjust the equipment parameters as needed.

Operation Modes:

The TOQ6-63 ATS supports two operation modes: Manual and Automatic.

• Automatic Mode (Auto): In this mode, the switch automatically transfers the load between the main and backup power supplies based on availability. This is the recommended mode for uninterrupted power.
• Manual Mode (Manual): To operate manually, the mode selection switch must be in the 'Manual' position. After manual operation is complete, return the selector switch to the automatic position.

Function Overview:

When the main power supply of the circuit fails, the equipment will immediately switch to the backup power supply. It will then switch back to the main power supply once the main power supply is restored, ensuring continuous power to the load.

6. Maintenance

Maintenance and inspection should be carried out by qualified professionals only.

Maintenance Schedule:

• For optimal performance, the first maintenance and inspection should be conducted within 6 months of initial use.
• Subsequently, maintenance and inspection should be performed at least once a year.
• In harsh installation conditions (e.g., dusty or humid environments), increase the frequency of maintenance and inspection.

Maintenance Procedures:

1. If maintenance and inspection items fail, remove any accumulated dust from the device.
2. Check for any deformation or damage to electrical contact parts and clean their surfaces. Rust, acidification, and dust on contact surfaces can lead to poor contact. Perform manual cleaning and measure contact resistance as necessary.
3. If the ATS is wet or has been left unused for a long time, dry it thoroughly before powering it on.
4. After removing dust, 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.

7. Troubleshooting

This section provides general guidance for common issues. For complex problems, always consult a qualified electrician.

Common Issues and Solutions:

• Device not switching automatically:
  • Check if the mode selection switch is set to 'Auto'.
  • Verify that both main and backup power sources are correctly connected and supplying power within the specified voltage range (85%Us-110%Us).
  • Inspect wiring for loose connections or damage.
• Overheating:
  • Ensure adequate ventilation around the device.
  • Check if the load current exceeds the rated current (63A).
  • Verify that the input voltage is within the normal working conditions (85%Us-110%Us), as low voltage can cause coils to overheat.
• Intermittent power supply:
  • Check all terminal connections for tightness.
  • Inspect contact surfaces for rust, acidification, or dust, which can cause poor contact. Refer to the maintenance section for cleaning procedures.
• Device not powering on:
  • Ensure all power sources are active.
  • Check for tripped circuit breakers upstream of the ATS.
  • Verify that the control circuit is receiving the correct voltage.

If the problem persists after performing these checks, it is recommended to contact a qualified electrical professional for further diagnosis and repair.

8. User Tips

• Quality and Durability: Users frequently report the device to be of very good quality with robust construction materials, suggesting good durability.
• Reliable Performance: The switch is noted for working well and performing its intended function effectively.
• Installation: While installation should be done by a professional, the compact size and DIN rail compatibility make it convenient for integration into existing electrical panels.

9. Frequently Asked Questions (FAQ)

No specific FAQ content is available at this time. Please refer to the relevant sections of this manual for information regarding installation, operation, and specifications.

10. Warranty and Support

For detailed warranty information, please refer to the documentation provided at the time of purchase or contact your retailer. For technical support, please reach out to TOMZN customer service or an authorized service center.

A user manual in PDF format is available for download: View User Manual (PDF).