Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of your TOMZN TOB1-63H 3P+3P MTS AC Dual Power Manual Transfer Switch Circuit Breaker. This device is designed to manage power supply from two independent sources, ensuring a reliable and secure electrical connection for various applications, including solar inverters, charge controllers, and battery banks.
Safety Information
WARNING: Electrical shock hazard. Installation and maintenance should only be performed by qualified personnel.
- Always disconnect all power sources before installing or servicing the device.
- Ensure proper grounding to prevent electrical shock.
- Verify that the voltage and current ratings of the device match your electrical system requirements.
- Do not operate the switch with wet hands or in damp conditions.
- Inspect the device regularly for any signs of damage or wear. Replace immediately if damaged.
- Use appropriate personal protective equipment (PPE) during installation and maintenance.
Setup and Installation
The TOB1-63H is designed for easy installation on a standard DIN rail. Follow these steps carefully to ensure a secure and functional setup.
Mounting
The circuit breaker features an integrated clip for quick and secure mounting onto a 35mm DIN rail. Align the device with the rail and press firmly until it clicks into place.

Image: Side view of the TOMZN TOB1-63H circuit breaker, illustrating the integrated clip for DIN rail mounting. This view highlights the robust construction and secure attachment mechanism.
Wiring Diagram
Refer to the diagram below for correct wiring connections. Ensure all connections are tight and secure to prevent arcing and overheating.

Image: Detailed wiring diagram for the TOMZN TOB1-63H Dual Power Manual Transfer Switch. It shows connections for 'Commonly used electricity A', 'Standby B', and 'Load', indicating the proper terminal assignments for a safe and functional setup.
- Input A (Commonly used electricity): Connect your primary power source to the terminals labeled 'Commonly used electricity A'.
- Input B (Standby): Connect your secondary or standby power source to the terminals labeled 'Standby B'.
- Load: Connect your electrical load to the terminals labeled 'Load'.
- Ensure all wires are correctly sized for the rated current and are securely fastened within the screw-type terminals.
Operating Instructions
The TOB1-63H allows manual switching between two power sources. Each power input has its own operating lever.

Image: Top view of the TOMZN TOB1-63H Dual Power Manual Transfer Switch, displaying the two blue operating levers. Each lever controls a separate power input, allowing manual selection between 'ON' and 'OFF' states for each line.
- To activate Power Source A, move the corresponding lever to the 'ON' position.
- To activate Power Source B, move its corresponding lever to the 'ON' position.
- To switch between sources, first move the currently active source's lever to the 'OFF' position, then move the desired new source's lever to the 'ON' position.
- Ensure only one power source is active at a time to prevent back-feeding and potential damage to the system or connected devices.
Maintenance
Regular maintenance ensures the longevity and reliable operation of your transfer switch.
- Periodically inspect all wiring connections for tightness. Loose connections can cause overheating.
- Check the device for any signs of physical damage, discoloration, or burning.
- Keep the device clean and free from dust and debris. Use a dry, soft cloth for cleaning.
- Do not use abrasive cleaners or solvents.
Troubleshooting
If you encounter issues with your transfer switch, consider the following common solutions:
- No Power to Load: Verify that both input power sources are active and that the correct lever is in the 'ON' position. Check for tripped upstream circuit breakers.
- Switch Not Engaging: Ensure the levers are fully engaged in the 'ON' or 'OFF' position. Do not force the levers.
- Overheating: Check all wiring connections for tightness. Ensure the device is not overloaded beyond its rated current.
- If problems persist after troubleshooting, consult a qualified electrician.
Specifications
| Feature | Specification |
|---|---|
| Model Number | TOB1-63H |
| Rated Voltage | 230V / 220V AC |
| Frequency | 50/60Hz |
| Breaking Capacity | 6KA |
| Rated Current Options | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Type | Miniature Circuit Breaker (MCB) |
| Mounting | 35mm DIN Rail |
| Material | High-quality insulating, flame-retardant, UV-resistant housing |
| Item Weight | 3.53 ounces |
| Package Dimensions | 0.39 x 0.39 x 0.39 inches |
| Application | Solar inverters, charge controllers, battery banks, general AC power transfer |





