The ABB HTSS252100 is a back-up current-limiting fuse for distribution transformers, rated 23.0 kV and 100 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: 23.0 kV
- Current rating: 100 A
- Rated maximum voltage: 25.5 kV
- Rated maximum interrupting current: 50.0 kA
- Minimum interrupting current: 575 A
- Minimum melting I²t: 12800 A²s
- Maximum total I²t: 70000 A²s
- Overall diameter: 55.9 mm
- Overall length: 408.9 mm
- Body length: 378.5 mm
- Weight: 2.15 kg
The same rating without the CN suffix is manufactured outside China.
Technical Specifications
- Part Number
- HTSS252100
- Manufacturer Part Number
- HTSS252100
- Series
- HTSS Series
- Fuse Type
- Backup current-limiting fuse
- Current Rating
- 100 A
- Voltage Rating
- 23.0 kV
- AC / DC
- AC
- Breaking Capacity
- 50.0 kA
- Pre-arcing I²t
- 12800
- Total I²t
- 70000
- Package / Dimensions
- 55.9 mm dia. x 408.9 mm overall length (378.5 mm body)
- Application
- Transformer
- Weight
- 2.15 kg
- Approvals
- IEEE C37.40
- Certifications
- IEEE C37.40
- Rated maximum voltage
- 25.5 kV; Rated maximum interrupting current: 50.0 kA; Minimum interrupting current: 575 A; Manufactured outside China