# Lightning Protection 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 to provide robust protection for electrical installations in TN-C systems. As power distribution networks become increasingly complex, the need for effective surge protection has never been greater.
## Key Features of the BR-20 3P SPD
High-Performance Protection
With a nominal discharge current (In) of 20kA per phase, this Type 2 SPD offers superior protection against transient overvoltages caused by lightning strikes or switching operations.
TN-C System Compatibility
Specifically engineered for TN-C systems where the neutral and protective earth functions are combined in a single conductor (PEN conductor).
Compact 3-Phase Design
The 3P configuration provides comprehensive protection for all phases in three-phase electrical systems.
## Technical Specifications
- Type: Type 2 (Class II) SPD
- Nominal Discharge Current (In): 20kA (8/20μs)
- Maximum Discharge Current (Imax): 40kA
- Voltage Protection Level (Up): ≤ 1.5kV
- Response Time: < 25ns
- Operating Voltage: 230/400V AC
- System Compatibility: TN-C
## Installation and Application
Typical Applications
The BR-20 3P is ideal for protecting electrical distribution boards in commercial and industrial facilities where TN-C earthing systems are employed.
Installation Guidelines
Install the SPD in parallel with the equipment to be protected, connected between phase conductors and the PEN conductor. Always follow local electrical codes and manufacturer instructions.
## Why Choose the BR-20 3P for TN-C Systems?
This surge protective device offers several advantages for TN-C installations:
- Specifically tested and certified for TN-C system requirements
- Provides balanced protection across all phases
- Thermal disconnector for safe failure mode
- Visual status indication for easy maintenance
- Compact design for space-efficient installation
## Maintenance and Monitoring
Regular inspection of the SPD is recommended to ensure continued protection. The device features a visual status indicator that shows when replacement is needed. In TN-C systems, particular attention should be paid to the PEN conductor connections.
## Conclusion
The BR-20 3P Type 2 20kA Surge Protective Device provides reliable, high-performance protection for electrical installations in TN-C systems. Its robust design and specific compatibility with TN-C earthing make it an excellent choice for safeguarding equipment against damaging transient overvoltages.
