ABB HTSS242125CN Backup Current-Limiting Fuse, 17.2 kV, 125 A

The ABB HTSS242125CN is a back-up current-limiting fuse for distribution transformers, rated 17.2 kV and 125 A. It is applied in series with a properly sized under-oil expulsion fuse (bay-o-net, load-sensing link or weak link): the expulsion fuse clears low-magnitude faults while the current-limiting fuse interrupts high fault currents and limits the let-through energy below the withstand capability of the transformer tank.

• Voltage rating: 17.2 kV
• Current rating: 125 A
• Rated maximum voltage: 17.2 kV
• Rated maximum interrupting current: 44.0 kA
• Minimum interrupting current: 540 A
• Minimum melting I²t: 14800 A²s
• Maximum total I²t: 66000 A²s
• Overall diameter: 55.9 mm
• Overall length: 421.6 mm
• Body length: 393.7 mm
• Weight: 2.15 kg

The CN suffix marks units manufactured in China. The same rating is also available without the suffix, manufactured outside China.