# BR-20 3P Type 2 20kA Surge Protective Device for TN-C Systems
## Introduction to Surge Protection in TN-C Systems
The BR-20 3P Type 2 20kA Surge Protective Device (SPD) is specifically designed for TN-C electrical systems, offering robust protection against transient overvoltages. In today’s increasingly electrified world, protecting sensitive equipment from power surges has become more critical than ever.
## Understanding TN-C Systems
TN-C systems combine the protective earth (PE) and neutral (N) conductors into a single conductor called PEN. This configuration presents unique challenges for surge protection that the BR-20 3P addresses effectively.
Key Features of BR-20 3P Type 2 SPD
The BR-20 3P offers several important features that make it ideal for TN-C applications:
- 20kA discharge capacity per phase (8/20μs)
- Type 2 classification according to IEC 61643-11
- Compact 3-pole design for space-efficient installation
- Visual status indication for easy maintenance
- Thermal disconnector for safe operation
## Technical Specifications
The BR-20 3P boasts impressive technical specifications:
| Parameter | Value |
|---|---|
| Nominal Voltage (Un) | 230/400V AC |
| Maximum Continuous Operating Voltage (Uc) | 320V AC |
| Voltage Protection Level (Up) | ≤1.5kV |
| Response Time | <25ns |
## Installation Considerations
Proper installation is crucial for optimal performance:
- Install as close as possible to the main distribution board
- Ensure proper grounding connections
- Follow all local electrical codes and regulations
- Use appropriate cross-section cables for connections
## Benefits for TN-C Systems
The BR-20 3P provides specific advantages for TN-C configurations:
– Specialized design for PEN conductor protection
– Reduced risk of neutral-to-earth voltage rise during surges
– Enhanced equipment protection in combined neutral/earth systems
## Maintenance and Monitoring
Regular maintenance ensures continued protection:
- Check status indicators monthly
- Perform annual visual inspections
- Test after significant electrical events
- Replace when end-of-life indicators show deterioration
## Conclusion
The BR-20 3P Type 2 20kA Surge Protective Device offers reliable protection specifically tailored for TN-C electrical systems. Its robust design, high discharge capacity, and specialized features make it an excellent choice for safeguarding equipment against damaging power surges in these unique electrical configurations.
