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BR-20 3+1 Type 2 20kA Surge Protective Device for TT and TNS Systems

In today’s electrical infrastructure, protecting sensitive equipment from power surges is critical. The BR-20 3+1 Type 2 20kA Surge Protective Device (SPD) is designed to safeguard electrical installations in both TT and TNS systems, ensuring reliable performance and enhanced safety.

Key Features of the BR-20 3+1 SPD

The BR-20 3+1 Type 2 SPD offers several advanced features that make it an ideal choice for surge protection:

• 20kA Surge Current Capacity: Capable of handling high-energy surges, providing robust protection for connected equipment.
• 3+1 Configuration: Designed for both phase-to-neutral and neutral-to-earth protection, ensuring comprehensive coverage.
• Type 2 Classification: Suitable for installation at the sub-distribution level, offering secondary surge protection.
• Compatibility with TT and TNS Systems: Versatile design ensures seamless integration into various grounding configurations.
• Visual Status Indicators: Easy-to-read indicators for quick monitoring of the device’s operational status.

Applications in TT and TNS Systems

The BR-20 3+1 SPD is engineered to perform optimally in both TT (Terra-Terra) and TNS (Terra-Neutral-Separate) systems. These grounding configurations are commonly used in residential, commercial, and industrial settings, making the BR-20 a versatile solution for diverse electrical environments.

In TT systems, where the neutral and earth are separate, the SPD provides critical protection against surges that could damage equipment or disrupt operations. Similarly, in TNS systems, where the neutral and earth are combined at the source but separated downstream, the BR-20 ensures reliable surge suppression.

Installation and Maintenance

Installing the BR-20 3+1 SPD is straightforward, thanks to its modular design and clear labeling. It is typically mounted on a DIN rail within the distribution board. Regular inspection of the status indicators is recommended to ensure the device remains functional. Replacement is simple when the end-of-life indicator signals the need for a new unit.

Why Choose the BR-20 3+1 SPD?

Choosing the right surge protective device is essential for minimizing downtime and protecting valuable equipment. The BR-20 3+1 Type 2 SPD stands out due to its:

• High surge current capacity (20kA per phase).
• Compatibility with multiple grounding systems (TT and TNS).
• Reliable performance under varying electrical conditions.
• Easy installation and maintenance.

For engineers, electricians, and facility managers, the BR-20 3+1 SPD offers a dependable solution for surge protection in modern electrical systems.