1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of the TOMZN TOB7Z-63 2P DC 1000V Solar Mini Circuit Breaker. This device is designed for protection in photovoltaic (PV) systems against overcurrent and short-circuit faults. Please read this manual thoroughly before installation and operation.
2. Product Features
- High Voltage DC Protection: Specifically designed for DC circuits up to 1000V.
- Rapid Response: Features millisecond switching and quick switch capabilities for immediate fault isolation.
- Robust Construction: Made with PC flame retardant material for enhanced safety.
- Durability: Offers an electrical life of not less than 8,000 times and a mechanical life of not less than 20,000 times.
- Environmental Adaptability: Operates reliably in ambient temperatures from -10°C to +40°C.
- Visible Indicators: Equipped with clear red (ON) and green (OFF) indicator windows for easy status identification.
- Easy Installation: Designed for rail mounting with fixed buckles for secure attachment.
3. Specifications
| Attribute | Value |
|---|---|
| Model Number | TOB7Z-63 |
| Type | Mini |
| Brand Name | TOMZN |
| Origin | Mainland China |
| Certification | CE |
| Standard | EN60898, IEC60898, IEC60947-2 |
| Characteristic Curve | B |
| Selective Grade | 3 |
| Working Ambient Temperature | -10°C ~ +40°C |
| Enclosed Protective Class | IP20 |
| Electrical Life | Not less than 8000 times |
| Mechanical Life | Not less than 20000 times |
| Rated Current Options | 3A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Rated Breaking Capacity | 6.0KA IEC60898 (0.5~63A) / 6,10,15KA IEC60947-2 (0.5~63A) |
4. Safety Information
WARNING: Electrical shock hazard. Installation and maintenance should only be performed by qualified personnel.
- Always disconnect power before installing or servicing the circuit breaker.
- Ensure the circuit breaker's voltage and current ratings match your PV system requirements.
- Do not operate the circuit breaker if it appears damaged.
- Follow all local and national electrical codes and regulations.
- The device is CE certified, indicating compliance with European safety standards.
5. Setup & Installation
5.1 Mounting
The TOB7Z-63 circuit breaker is designed for rail mounting. Securely attach the device to a standard DIN rail using the fixed buckles located on the back of the unit.
5.2 Wiring
Refer to the wiring diagram below for proper connection. Ensure correct polarity for DC systems. When connecting power lines, screw down firmly to penetrate the insulating layer of the wires and ensure a secure connection.
IMPORTANT: Pay close attention to the positive (+) and negative (-) terminals. Incorrect polarity can damage the system.
6. Operating Instructions
The circuit breaker features a simple ON/OFF operating handle and clear status indicators.
- To Turn ON: Push the operating handle upwards. The indicator window will show RED.
- To Turn OFF: Pull the operating handle downwards. The indicator window will show GREEN.
- In case of an overcurrent or short-circuit fault, the circuit breaker will automatically trip to the OFF position (Green indicator).
7. Maintenance
The TOMZN TOB7Z-63 circuit breaker is designed for minimal maintenance. However, periodic checks are recommended to ensure optimal performance and safety.
- Visual Inspection: Regularly inspect the circuit breaker for any signs of physical damage, discoloration, or loose connections.
- Cleaning: Keep the device free from dust and debris. Use a dry, non-abrasive cloth for cleaning. Do not use liquids or solvents.
- Connection Check: Periodically verify that all terminal connections are tight and secure.
- Functionality Test: If possible and safe to do so, periodically test the trip mechanism by simulating a fault condition (only by qualified personnel).
8. Troubleshooting
If the circuit breaker trips frequently or fails to operate correctly, consider the following:
- Frequent Tripping: This may indicate an overload or a short circuit in the protected circuit. Investigate the connected load and wiring for faults.
- Failure to Reset: If the breaker does not reset after tripping, ensure the fault condition has been cleared. If the issue persists, the breaker may be damaged and require replacement.
- No Power: Check all connections for tightness and ensure the breaker is in the ON position. Verify power supply to the breaker.
If you are unable to resolve an issue, consult a qualified electrician or contact TOMZN customer support.
9. User Tips
- Polarity is Key: As highlighted in the wiring section, correctly identifying and connecting the positive (+) and negative (-) terminals is crucial for DC systems. Double-check your wiring against the diagram before applying power.
- Match Amperage: Ensure the rated current (e.g., 3A, 6A, 10A, etc.) of the circuit breaker matches the requirements of your solar PV system to provide adequate protection without nuisance tripping.
- Professional Installation: For complex PV systems or if you are unsure about electrical work, it is always recommended to have the circuit breaker installed by a certified professional.
10. Warranty & Support
For warranty information, technical support, or service inquiries, please contact TOMZN Official Store or refer to the product packaging for specific contact details. When contacting support, please provide the model number (TOB7Z-63) and the rated current of your device.
