# BR-20 3+1 Type 2 20kA Surge Protective Device for TT and TNS Systems
## Introduction to Surge Protection
In today’s world, where electrical systems are becoming increasingly complex and sensitive, protecting them from transient overvoltages is crucial. The BR-20 3+1 Type 2 20kA Surge Protective Device (SPD) offers robust protection for both TT and TNS earthing systems, ensuring the safety of your electrical installations and connected equipment.
## Key Features of BR-20 3+1 SPD
The BR-20 3+1 Type 2 SPD stands out with its impressive characteristics:
– 20kA discharge capacity per phase (Iimp)
– 3+1 protection mode configuration
– Suitable for both TT and TNS earthing systems
– Compact design for easy installation
– Visual status indicators for quick monitoring
– High thermal protection for enhanced safety
## Technical Specifications
Understanding the technical aspects of this SPD helps in making an informed decision:
Parameter | Value
Type | Type 2 (Class II)
Nominal Discharge Current (In) | 20kA
Maximum Discharge Current (Imax) | 40kA
Voltage Protection Level (Up) | ≤1.5kV
Response Time | <25ns
Operating Temperature Range | -40°C to +80°C
## Installation and Application
The BR-20 3+1 SPD is designed for straightforward installation in various applications:
This device is typically installed in the main distribution board as the first line of defense against power surges. Its 3+1 configuration makes it particularly effective in systems where neutral-to-earth protection is required, such as in TT earthing systems.
Recommended Applications:
- Residential buildings
- Commercial establishments
- Industrial facilities
- Telecommunication systems
- Data centers
## Why Choose BR-20 3+1 for TT and TNS Systems?
The BR-20 3+1 SPD offers distinct advantages for different earthing systems:
For TT Systems:
In TT systems where the neutral and earth are separated, the 3+1 configuration provides essential protection between neutral and earth conductors, preventing dangerous potential differences during surge events.
For TNS Systems:
In TNS systems with separate neutral and protective earth conductors, the BR-20 offers comprehensive phase-to-neutral and neutral-to-earth protection, ensuring complete system security.
## Maintenance and Monitoring
Regular inspection of the BR-20 SPD is recommended to ensure optimal performance. The device features clear status indicators that show:
- Green: Normal operation
- Red: End of life or fault condition
When the indicator shows red, the module should be replaced immediately to maintain protection.
## Conclusion
The BR-20 3+1 Type 2 20kA Surge Protective Device represents an excellent solution for comprehensive surge protection in both TT and TNS earthing systems. Its robust design, high discharge capacity, and versatile configuration make it an ideal choice for protecting electrical installations against transient overvoltages, ensuring the longevity of your equipment and the safety of your electrical system.
