# BR-20 3P Type 2 20kA Surge Protective Device for TN-C Systems
## Introduction to Surge Protection in TN-C Systems
The BR-20 3P Type 2 20kA Surge Protective Device (SPD) is specifically designed for TN-C electrical systems, offering robust protection against transient overvoltages. In today’s increasingly complex electrical environments, protecting sensitive equipment from power surges has become more critical than ever.
## Understanding TN-C Systems
TN-C systems combine the protective earth (PE) and neutral (N) conductors into a single conductor (PEN) throughout the system. This configuration presents unique challenges for surge protection that the BR-20 3P Type 2 SPD effectively addresses.
### Key Features of TN-C Systems:
– Combined PEN conductor
– Common grounding arrangement
– Specific protection requirements
– Potential neutral voltage fluctuations
## Technical Specifications of BR-20 3P Type 2 SPD
The BR-20 3P Type 2 20kA SPD offers exceptional performance characteristics:
– Nominal discharge current (In): 20kA (8/20μs)
– Maximum discharge current (Imax): 40kA (8/20μs)
– Voltage protection level (Up): <1.5kV
– Response time: <25ns
– Operating voltage: 230/400V AC
– Temperature range: -40°C to +80°C
## Installation and Application
Proper installation is crucial for optimal performance of the BR-20 3P Type 2 SPD in TN-C systems:
### Installation Guidelines:
– Mount close to the main distribution board
– Ensure proper connection to the PEN conductor
– Follow manufacturer’s wiring diagrams
– Use appropriate cross-section cables
– Maintain proper clearance distances
### Typical Applications:
– Industrial facilities
– Commercial buildings
– Data centers
– Healthcare facilities
– Infrastructure projects
## Advantages of BR-20 3P Type 2 SPD
This surge protective device offers several benefits for TN-C systems:
– High energy handling capacity
– Fast response time
– Compact design
– Visual status indication
– Thermal disconnection protection
– Compliance with relevant standards
## Maintenance and Monitoring
Regular maintenance ensures continued protection:
– Visual inspection of status indicators
– Checking connection integrity
– Monitoring environmental conditions
– Periodic testing as per manufacturer recommendations
– Replacement when end-of-life indicators activate
## Compliance and Standards
The BR-20 3P Type 2 20kA SPD complies with:
– IEC 61643-11
– EN 61643-11
– UL 1449 (where applicable)
– Local electrical codes and regulations
## Conclusion
The BR-20 3P Type 2 20kA Surge Protective Device provides reliable and effective protection for TN-C electrical systems against transient overvoltages. Its robust design, high performance characteristics, and compliance with international standards make it an ideal choice for safeguarding electrical installations in various applications.
