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BR-20 4P Type 2 20kA Surge Protective Device for TNS Systems
In today’s increasingly connected world, protecting electrical systems from power surges is more critical than ever. The BR-20 4P Type 2 20kA Surge Protective Device (SPD) is specifically designed to safeguard TNS (Terra Neutral Separate) systems against transient overvoltages, ensuring the longevity and reliability of your electrical infrastructure.
What is the BR-20 4P Type 2 SPD?
The BR-20 4P is a high-performance surge protective device engineered for Type 2 applications. With a nominal discharge current (In) of 20kA, it provides robust protection against lightning-induced surges and switching transients. This 4-pole device is particularly suited for TNS earthing systems, where separate neutral and protective earth conductors are used.
Key Features and Benefits
- 20kA Nominal Discharge Current: Offers superior protection against powerful surges
- 4-Pole Design: Comprehensive protection for all phases and neutral
- TNS System Compatibility: Specifically designed for Terra Neutral Separate earthing arrangements
- Visual Status Indicators: Clear indication of operational status and end-of-life
- Thermal Disconnector: Automatic disconnection in case of overload
- Compact Design: Easy installation in distribution boards
Technical Specifications
| Parameter | Value |
|---|---|
| Type | Type 2 SPD |
| 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 |
Installation Guidelines
The BR-20 4P SPD should be installed in parallel with the electrical system it protects, preferably at the main distribution board. Key installation considerations include:
- Ensure proper earthing connections
- Use appropriate cross-section cables (minimum 6mm²)
- Maintain short connection paths to minimize inductance
- Follow local electrical codes and regulations
- Consider upstream overcurrent protection
Why Choose the BR-20 for TNS Systems?
TNS systems require specific surge protection considerations due to their separate neutral and earth conductors. The BR-20 4P addresses these requirements by:
- Providing equal protection to all phases and the neutral conductor
- Maintaining system integrity during surge events
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