# BR-20 2P Type 2 20kA Surge Protective Device for TNS Systems
## Introduction to Surge Protection
In today’s world, where electrical systems are becoming increasingly complex and sensitive, surge protection has become a critical component of any electrical installation. The BR-20 2P Type 2 20kA Surge Protective Device (SPD) is specifically designed to protect TNS (Terre-Neutre-Séparé) systems from damaging voltage surges.
## Understanding TNS Systems
TNS systems are a common type of earthing arrangement where the neutral and protective earth conductors are separate throughout the system. This configuration requires specialized surge protection devices that can handle the unique characteristics of these systems while providing optimal protection.
## Key Features of BR-20 2P SPD
The BR-20 2P Type 2 SPD offers several important features:
– 20kA discharge capacity per pole
– Compact 2-pole design
– Specifically designed for TNS systems
– Visual status indication
– Thermal disconnection for safety
– Easy DIN rail mounting
## Technical Specifications
Parameter | Value
Type | Type 2
Nominal Discharge Current (In) | 20kA (10/350μs)
Voltage Protection Level (Up) | <1.5kV
Response Time | <25ns
Operating Temperature Range | -40°C to +80°C
## Installation Guidelines
Proper installation is crucial for effective surge protection:
1. Install the SPD as close as possible to the equipment being protected
2. Ensure proper earthing connections
3. Follow all local electrical codes and regulations
4. Use appropriately sized conductors
5. Consider adding upstream protection if required
## Maintenance and Monitoring
The BR-20 2P SPD includes visual indicators to show its operational status:
– Green LED: Device is operational
– Red LED: End-of-life indication
– Mechanical flag: Additional status indication
Regular inspection is recommended to ensure continued protection.
## Applications
This surge protective device is ideal for:
– Commercial buildings
– Industrial facilities
– Data centers
– Healthcare facilities
– Any critical infrastructure using TNS earthing systems
## Conclusion
The BR-20 2P Type 2 20kA Surge Protective Device provides reliable protection for TNS systems against transient overvoltages. Its robust design, high discharge capacity, and clear status indication make it an excellent choice for professionals looking to safeguard their electrical installations from damaging surges.
