# 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 to protect electrical installations in TNS (Terre-Neutral-Separé) systems against transient overvoltages. As power quality becomes increasingly important in modern electrical networks, reliable surge protection has become essential for safeguarding sensitive equipment and ensuring uninterrupted operations.
## Key Features of the BR-40 4P SPD
This high-performance surge protective device offers several important characteristics:
– 40kA maximum discharge current (Imax) per phase
– Type 2 classification according to IEC 61643-11
– 4-pole design for comprehensive protection
– Specifically engineered for TNS earthing systems
– Compact design for easy installation
– Visual status indication for quick monitoring
## Technical Specifications
The BR-40 4P Type 2 SPD boasts impressive technical parameters:
Parameter | Value
Nominal Voltage (Un) | 230/400V AC
Maximum Continuous Operating Voltage (Uc) | 320V AC
Voltage Protection Level (Up) | ≤1.5kV
Response Time | <25ns
Short-Circuit Current Rating | 25kA
## Installation and Application
The BR-40 4P is designed for straightforward installation in distribution boards. Its compact dimensions allow for space-efficient mounting alongside other protective devices. This SPD is particularly suitable for:
– Commercial buildings
– Industrial facilities
– Data centers
– Healthcare institutions
– Any critical infrastructure using TNS earthing systems
## Why Choose the BR-40 4P for TNS Systems?
TNS systems present unique challenges for surge protection due to their separate neutral and earth conductors. The BR-40 4P addresses these challenges with:
– Optimized protection coordination for TNS configurations
– Enhanced thermal protection
– Robust construction for long service life
– Compliance with relevant international standards
## Maintenance and Monitoring
Regular inspection of the BR-40 4P is recommended to ensure ongoing protection. The device features:
– Clear visual status indicators
– Replaceable modules (where applicable)
– Remote signaling contacts (optional)
– Compatibility with monitoring systems
## Conclusion
The BR-40 4P Type 2 40kA Surge Protective Device represents an optimal solution for protecting TNS systems against damaging voltage surges. Its combination of high discharge capacity, fast response time, and system-specific design makes it an excellent choice for engineers and installers seeking reliable surge protection in critical applications.
