# BR-20 4P Type 2 20kA Surge Protective Device for TNS Systems
## Introduction to Surge Protection in TNS Systems
The BR-20 4P Type 2 20kA Surge Protective Device (SPD) is specifically designed for TNS (Terre-Neutre-Séparé) electrical systems, offering robust protection against transient overvoltages. In today’s increasingly electronic-dependent world, safeguarding electrical installations from power surges has become more critical than ever.
## Key Features of the BR-20 4P SPD
This high-performance surge protector boasts several important characteristics:
– 20kA discharge capacity per phase
– 4-pole protection (L1, L2, L3, N)
– Type 2 classification according to IEC 61643-11
– Specifically designed for TNS earthing systems
– Compact and modular design for easy installation
– Visual status indicators for quick monitoring
## Understanding TNS System Requirements
TNS systems, where the neutral and protective earth are separate throughout the installation, present unique challenges for surge protection. The BR-20 4P addresses these requirements by:
– Providing coordinated protection between phases and neutral
– Maintaining proper separation of protective earth and neutral conductors
– Ensuring compliance with TNS system standards
– Offering optimal protection for sensitive electronic equipment
## Installation and Application Considerations
When implementing the BR-20 4P in TNS systems, several factors should be considered:
– Proper coordination with upstream protection devices
– Correct connection to the TNS earthing arrangement
– Appropriate cable sizing for optimal performance
– Compliance with local electrical regulations
– Regular maintenance and inspection schedules
## Performance and Reliability
The BR-20 4P Type 2 SPD delivers exceptional performance characteristics:
– Fast response time (<25ns) to transient events
– Low residual voltage for enhanced equipment protection
– High energy absorption capacity
– Thermal disconnection for fail-safe operation
– Durable construction for long service life
## Conclusion
For TNS electrical systems requiring reliable surge protection, the BR-20 4P Type 2 20kA Surge Protective Device offers an optimal solution. Its combination of high discharge capacity, TNS-specific design, and robust construction makes it an excellent choice for protecting sensitive electrical and electronic equipment from damaging power surges.
