# BR-40 2P Type 2 40kA Surge Protective Device for TNS Systems
## Introduction to Surge Protection in TNS Systems
The BR-40 2P Type 2 40kA Surge Protective Device (SPD) is specifically designed to safeguard electrical installations in TNS (Terre-Neutre-Séparé) systems against transient overvoltages. As power quality becomes increasingly critical in modern electrical networks, implementing robust surge protection has become essential for both residential and commercial applications.
## Key Features of the BR-40 SPD
High Performance Protection
The BR-40 offers 40kA per pole (20kA per mode) protection capacity, making it suitable for most standard electrical installations. Its Type 2 classification indicates it’s designed for installation at the distribution board level, providing secondary protection after the main service entrance.
Compact 2-Pole Design
With its space-saving 2-pole configuration, the BR-40 can be easily installed in standard distribution boards without requiring excessive space. The modular design allows for simple replacement when needed.
Visual Status Indication
The device features clear visual indicators that show the operational status at a glance, ensuring quick verification of protection status during routine maintenance checks.
## Technical Specifications
- Nominal voltage: 230V AC
- Maximum continuous operating voltage (Uc): 320V
- Voltage protection level (Up): ≤1.5kV
- Response time: <25ns
- Operating temperature range: -40°C to +80°C
- Connection: 25mm² max
## Installation Considerations for TNS Systems
When installing the BR-40 in TNS systems, particular attention should be paid to:
- Proper connection to both live conductors (L and N)
- Correct earthing connection to the main earth terminal
- Maintaining appropriate separation between input and output wiring
- Ensuring the SPD is installed downstream of the main circuit breaker
## Maintenance and Monitoring
While the BR-40 requires minimal maintenance, regular visual inspections are recommended to check the status indicators. The device features thermal disconnection technology that safely disconnects the SPD from the circuit if it becomes overloaded, preventing any risk of fire.
## Compliance and Standards
The BR-40 complies with relevant international standards including IEC 61643-11 and is certified for use in TNS earthing systems. Its design ensures reliable operation under various electrical network conditions while providing optimal protection against lightning-induced and switching surges.
## Conclusion
The BR-40 2P Type 2 40kA Surge Protective Device offers an effective solution for protecting TNS systems against transient overvoltages. Its combination of high performance, compact design, and reliable operation makes it an excellent choice for electrical installers and system designers looking to enhance the surge protection of their installations.
