Product Overview
The PRNT-15.5 High-Voltage Current-Limiting Fuse for Overload Protection of Oil-Immersed Transformer is a high-voltage fuse for the overload protection of oil-immersed transformers, suitable for indoor AC 50Hz high-voltage indoor power systems with a rated voltage of 15.5kV and a rated current up to 140A. It must be connected in series with the XRNT-15.5 backup fuse for the short-circuit protection of oil-immersed transformers to form the overload and short-circuit protection for power transformers. Specifically, it is only used to protect against short-circuit faults on the secondary side of transformers and fault currents within a narrow range as part of providing full-range protection.
Overall and Mounting Dimensions (mm)
| Rated Voltage (kV) | Max. Voltage (kV) | Fuse Rated Current (A)140 |
| Fuse Rated Current (A): 6.3, 10, 16, 25, 40, 50, 63, 100, 150 | Operating Environment in Transformer Oil | |
| Rated Max Breaking Current (kA) | ||
Overall and Mounting Dimensions (mm)
Overall and Mounting Dimensions (mm)
General Selection Guide for Primary Fuses of 10kV Oil-Immersed Transformers
| Transformer Capacity (kVA) | Rated Current (A) | XRNT-15.5 Rated Current (A) | PRNT-15.5 Rated Current (A) |
|---|---|---|---|
| 50 | 275 | 31.5 | 6.3 |
| 100 | 5.5 | 40 | 10 |
| 160 | 8.8 | 63 | 16 |
| 200 | 11.0 | 80/63 | 25 |
| 250 | 13.7 | 80 | 25 |
| 315 | 17.3 | 100 | 40 |
| 400 | 22.0 | 125 | 40 |
| 500 | 27.5 | 150 | 50 |
| 630 | 34.6 | 175 | 63 |