# 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 electrified world, 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 addresses effectively.
### Key Characteristics of TN-C Systems:
– Combined PEN conductor
– Common grounding arrangement
– Specific requirements for surge protection devices
## Features of the BR-20 3P Type 2 SPD
The BR-20 offers several advanced features that make it ideal for TN-C system applications:
– 20kA discharge capacity per phase (Type 2)
– 3-pole design for comprehensive protection
– Specifically engineered for TN-C system requirements
– Compact and easy-to-install design
– Visual status indication for quick monitoring
## Technical Specifications
Parameter | Value
Type | Type 2 (Class II)
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
System Compatibility | TN-C
## Installation Considerations
Proper installation is crucial for optimal performance of the BR-20 SPD in TN-C systems:
– Should be installed at the main distribution board
– Requires connection to the PEN conductor
– Must be installed by qualified electricians
– Follow manufacturer’s guidelines for wiring
– Consider coordination with other protective devices in the system
## Benefits of Using BR-20 in TN-C Systems
Implementing the BR-20 SPD in your TN-C system offers numerous advantages:
– Enhanced equipment protection against transient overvoltages
– Reduced downtime and maintenance costs
– Compliance with relevant electrical safety standards
– Long service life with reliable performance
– Cost-effective solution for surge protection
## Maintenance and Monitoring
While the BR-20 requires minimal maintenance, regular checks are recommended:
– Visual inspection of status indicators
– Periodic testing according to manufacturer’s guidelines
– Replacement when end-of-life indicator shows
– Documentation of installation and maintenance activities
The BR-20 3P Type 2 20kA Surge Protective Device provides an effective solution for protecting TN-C systems against damaging power surges. Its specialized design, robust performance characteristics, and ease of installation make it an excellent choice for electrical installations requiring reliable surge protection in TN-C configurations.
