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BR-40 3P Type 2 40kA Surge Protective Device for TN-C Systems
In today’s modern electrical infrastructure, protecting sensitive equipment from power surges is a critical concern. The BR-40 3P Type 2 40kA Surge Protective Device (SPD) is specifically designed to safeguard TN-C systems against transient overvoltages caused by lightning strikes, switching operations, and other electrical disturbances. With a high discharge capacity of 40kA, this device ensures reliable surge protection for industrial, commercial, and residential applications.
Understanding Surge Protection and Its Importance
Electrical surges are sudden, short-lived increases in voltage that can damage or destroy electronic equipment. These surges can originate from external sources like lightning or internal sources such as inductive load switching. A surge protective device acts as the first line of defense, diverting excess voltage away from sensitive equipment and preventing costly downtime.
The BR-40 3P Type 2 SPD is particularly effective in TN-C systems, where the neutral and protective earth functions are combined in a single conductor. This configuration presents unique challenges for surge protection, making specialized devices like the BR-40 essential for maintaining electrical safety.
Key Features of the BR-40 3P Type 2 40kA SPD
1. High Discharge Capacity
With a nominal discharge current (In) of 20kA and a maximum discharge current (Imax) of 40kA, the BR-40 offers superior protection against powerful surges. This high capacity makes it suitable for areas with frequent lightning activity or facilities with critical electrical loads.
2. Type 2 Classification
As a Type 2 SPD, the BR-40 is designed for installation at distribution boards, providing secondary protection after the main service entrance. It coordinates perfectly with Type 1 devices at the service entrance for comprehensive lightning protection.
3. TN-C System Compatibility
The device is specifically engineered for TN-C systems, where the combined neutral and protective earth conductor requires special consideration in surge protection design. Its advanced technology ensures proper operation even in this challenging configuration.
4. Visual Status Indication
The BR-40 features clear visual indicators that show the operational status of the device, allowing for quick inspection and maintenance. This feature enhances overall system reliability and simplifies troubleshooting.
Technical Specifications
- Rated voltage: 230/400V AC
- Nominal discharge current (In): 20kA (8/20μs)
- Maximum discharge current (Imax): 40kA (8/20μs)
- Voltage protection level (Up): ≤ 1.5kV
- Response time: < 25ns
- Operating temperature range: -40°C to +80°C
- Protection modes: L-PE, N-PE
