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BR-20 3+1 Type 2 20kA Surge Protective Device for TT and TNS Systems
In today’s electrical infrastructure, protecting sensitive equipment from power surges is crucial. The BR-20 3+1 Type 2 20kA Surge Protective Device (SPD) is designed to safeguard electrical installations in both TT and TNS systems, ensuring reliable operation and longevity of connected devices.
Key Features of the BR-20 SPD
The BR-20 offers several advanced features that make it an ideal choice for surge protection:
- 20kA discharge capacity per phase (Imax)
- 3+1 configuration for comprehensive protection
- Compatible with both TT and TNS earthing systems
- Type 2 classification according to IEC 61643-11
- Visual status indication for easy monitoring
- Thermal disconnection for enhanced safety
Applications
This surge protective device is particularly suitable for:
- Commercial buildings
- Industrial facilities
- Residential complexes
- Data centers
- Telecommunication installations
Technical Specifications
| Parameter | Value |
|---|---|
| Nominal voltage (Un) | 230/400V AC |
| Maximum continuous operating voltage (Uc) | 275/320V AC |
| Nominal discharge current (In) | 10kA (8/20μs) |
| Maximum discharge current (Imax) | 20kA (8/20μs) |
| Voltage protection level (Up) | ≤1.5kV |
Installation Considerations
When installing the BR-20 SPD:
- Ensure proper earthing connection
- Install as close as possible to the main distribution board
- Follow all local electrical codes and regulations
- Use appropriate cross-section cables
- Verify system voltage compatibility before installation
The BR-20 3+1 Type 2 SPD provides robust protection against transient overvoltages, making it an essential component for modern electrical systems in both TT and TNS configurations.
