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BR-20 1+1 Type 2 20kA Surge Protective Device for TT and TNS Systems
In today’s increasingly electrified world, protecting sensitive electrical equipment from power surges is more critical than ever. The BR-20 1+1 Type 2 20kA Surge Protective Device (SPD) offers robust protection for both TT and TNS earthing systems, ensuring your electrical installations remain safe from transient overvoltages.
Key Features of the BR-20 SPD
The BR-20 SPD stands out with several important features that make it an excellent choice for surge protection:
- 20kA discharge capacity per pole (Imax)
- 1+1 protection mode configuration
- Type 2 classification according to IEC 61643-11
- Suitable for both TT and TNS earthing systems
- Compact design for easy installation
- Visual status indication for quick monitoring
Understanding the 1+1 Protection Mode
The “1+1” configuration refers to the SPD’s ability to provide protection between both live conductors (L-N) and between live conductors and earth (L-PE, N-PE). This dual protection approach ensures comprehensive coverage against various types of surges that might enter the electrical system.
Compatibility with TT and TNS Systems
One of the standout features of the BR-20 is its compatibility with both TT and TNS earthing systems:
TT System Protection
In TT systems where the neutral and protective earth are separate, the BR-20 provides effective protection between live conductors and earth, helping to prevent dangerous potential differences.
TNS System Protection
For TNS systems with separate neutral and protective earth conductors, the BR-20 offers coordinated protection that addresses the specific characteristics of this earthing arrangement.
Installation Considerations
When installing the BR-20 SPD:
- Always follow local electrical codes and regulations
- Install as close as possible to the equipment being protected
- Ensure proper earthing connections
- Consider using Type 1 SPD upstream if lightning protection is required
Why Choose the BR-20 SPD?
The BR-20 1+1 Type 2 20kA SPD offers a reliable, cost-effective solution for protecting electrical installations in both commercial and residential applications. Its robust design, high discharge capacity, and compatibility with multiple earthing systems make it a versatile choice for modern electrical protection needs.
For optimal protection, always consult with a qualified electrician to ensure proper selection and installation of surge protective devices in your specific electrical system.
