FUCHSBERG ELECTRIC Tipo 2 Dispositivo de protección contra sobretensiones HSA 255 TT 7.5 U para montaje en barras colectoras, 1 polo, 255 V AC 556712

Type 2 surge protective device for busbar mounting in main and sub-distribution boards. The HSA 255 TT 7.5 U protects single-pole circuits in TT and TN-S earthing systems with a varistor-based design and visual status indication.

Advantages

Direct busbar contact eliminates wiring effort. The compact thermoplastic housing is flame retardant and rated IP20. A green/red indicator shows the protection status at a glance.

Suitable for

• Main distribution boards
• Sub-distribution boards
• TT and TN-S earthing systems

Key specifications

• SPD type: Type 2 (T2)
• Nominal voltage: 230 V AC
• Maximum continuous operating voltage: 255 V AC
• Nominal discharge current (8/20 µs): 20 kA
• Maximum discharge current (8/20 µs): 40 kA
• Voltage protection level: < 1.5 kV
• Protection mode: 1-pole, L-N / N-PE
• Mounting: busbar
• Operating temperature: -40 °C to +80 °C
• Degree of protection: IP20

Recommendations

Verify the busbar profile and available space before installation. The device is intended for use by qualified electricians in accordance with local regulations.