# BR-40 4P Type 2 40kA Surge Protective Device for TNS Systems
## Introduction to Surge Protection in TNS Systems
The BR-40 4P Type 2 40kA 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-40 SPD
This high-performance surge protector boasts several important characteristics:
– 40kA discharge capacity per phase (Iimp)
– Type 2 classification according to IEC 61643-11
– 4-pole design for comprehensive protection
– Specifically engineered for TNS earthing systems
– Compact and modular design for easy installation
– Visual status indicators for quick monitoring
## Technical Specifications
The BR-40 offers impressive technical parameters:
Parameter | Value
Maximum continuous operating voltage (Uc) | 275V AC
Nominal discharge current (In) | 20kA (8/20μs)
Voltage protection level (Up) | ≤1.5kV
Response time | <25ns
Operating temperature range | -40°C to +80°C
## Installation and Application
The BR-40 is typically installed in the main distribution board of TNS systems. Its 4-pole configuration provides protection between:
– Phase to Neutral
– Phase to Earth
– Neutral to Earth
This comprehensive protection scheme ensures all potential surge paths are covered, making it ideal for commercial and industrial applications where TNS earthing is employed.
## Why Choose the BR-40 for TNS Systems?
The BR-40 stands out for several reasons:
– Optimized performance specifically for TNS configurations
– High discharge capacity suitable for areas with frequent lightning activity
– Reliable protection for sensitive electronic equipment
– Compliance with international standards
– Long service life with maintenance-free operation
## Maintenance and Monitoring
While the BR-40 is designed for maintenance-free operation, regular visual inspections are recommended. The device features clear status indicators that show:
– Green: Normal operation
– Red: End of life (requires replacement)
This simple monitoring system ensures users can easily verify the SPD’s operational status.
The BR-40 4P Type 2 40kA Surge Protective Device represents an excellent solution for protecting TNS electrical systems against transient overvoltages. Its combination of high performance, specific design for TNS applications, and user-friendly features make it a reliable choice for electrical engineers and installers seeking to safeguard critical electrical infrastructure.
