# BR-20 2P Type 2 20kA Surge Protective Device for TNS Systems
## Introduction to Surge Protection
In today’s world, electrical systems are constantly exposed to power surges that can damage sensitive equipment. The BR-20 2P Type 2 20kA Surge Protective Device (SPD) offers reliable protection for TNS (Terra-Neutral-Separate) systems against these potentially destructive electrical events.
## Key Features of the BR-20 SPD
High-Performance Protection
The BR-20 provides 20kA per phase (10/350μs) surge protection capacity, making it suitable for most commercial and industrial applications. Its robust design ensures long-term reliability even in demanding environments.
Type 2 Classification
As a Type 2 SPD, the BR-20 is designed for installation at distribution boards, offering secondary protection when used with a Type 1 device or as primary protection in areas with lower lightning risk.
Compact 2P Design
The two-pole configuration makes it ideal for single-phase TNS systems, providing protection between line and neutral conductors while maintaining a compact footprint for easy installation.
## Technical Specifications
- Nominal discharge current (In): 20kA (10/350μs)
- Maximum discharge current (Imax): 40kA (8/20μs)
- Voltage protection level (Up): ≤ 1.5kV
- Response time: < 25ns
- Operating voltage: 230V AC
- Operating temperature range: -40°C to +80°C
## Installation and Application
Compatibility with TNS Systems
The BR-20 is specifically designed for TNS earthing systems, where the neutral and protective earth conductors are separate throughout the distribution network. This configuration is common in many European countries.
Installation Guidelines
For optimal performance:
- Install close to the equipment being protected
- Use appropriate cross-section cables (minimum 4mm²)
- Ensure proper earthing connections
- Follow local electrical regulations and standards
## Maintenance and Monitoring
The BR-20 features a visual status indicator that shows the operational state of the device. Regular inspection is recommended to ensure continued protection. The modular design allows for easy replacement when the SPD reaches its end of life.
## Conclusion
The BR-20 2P Type 2 20kA Surge Protective Device offers an effective solution for protecting TNS electrical systems against transient overvoltages. Its combination of high performance, compact design, and reliable operation makes it an excellent choice for safeguarding sensitive electrical equipment in various applications.
