# BR-20 1+1 Type 2 20kA Surge Protective Device for TT and TNS Systems
## Introduction to Surge Protection
In today’s increasingly electrified world, protecting electrical systems from transient overvoltages has become crucial. The BR-20 1+1 Type 2 20kA Surge Protective Device (SPD) offers robust protection for both TT and TNS earthing systems, safeguarding sensitive equipment from potentially damaging power surges.
## Key Features of the BR-20 SPD
The BR-20 1+1 Type 2 SPD stands out with several important characteristics:
– 20kA discharge capacity per pole
– 1+1 protection mode configuration
– Suitable for both TT and TNS earthing systems
– Compact design for easy installation
– Visual status indication for quick monitoring
## Technical Specifications
Understanding the technical aspects of this SPD helps in proper selection and application:
Nominal discharge current (In): 20kA (8/20μs)
Maximum discharge current (Imax): 40kA (8/20μs)
Voltage protection level (Up): ≤ 1.5kV
Response time: <25ns
Operating temperature range: -40°C to +80°C
## Installation Considerations
Proper installation is key to effective surge protection:
Mounting Position
The BR-20 should be installed as close as possible to the equipment being protected, preferably at the main distribution board.
Connection Requirements
Use short, straight connections with minimal bends to reduce inductance. The cross-section of connecting conductors should be at least 6mm² for optimal performance.
## Applications
This versatile SPD finds use in various scenarios:
– Residential buildings
– Commercial facilities
– Industrial installations
– Telecommunication systems
– Data centers
## Maintenance and Monitoring
Regular inspection ensures continued protection:
The BR-20 features a visual status indicator that shows whether the device is operational or needs replacement. It’s recommended to check this indicator at least annually or after significant electrical events.
## Conclusion
The BR-20 1+1 Type 2 20kA Surge Protective Device provides reliable protection for both TT and TNS systems against transient overvoltages. Its robust design, high discharge capacity, and compatibility with different earthing arrangements make it an excellent choice for comprehensive surge protection in various electrical installations.
