Technical guide describing SIBA high‑voltage HRC fuses for use with Siemens 8DJH and NXPLUS C medium‑voltage switchgear.
This document explains the selection, configuration, and performance of SIBA high‑voltage HRC fuses when combined with load switches for protecting distribution transformers in medium‑voltage switchgear. It compares breaker‑relay combinations with switch‑fuse combinations and outlines the factors to consider such as investment cost, network grounding, and fault current handling.
Detailed tables provide the minimum fuse current, transfer current ranges, rated voltage options, and maximum continuous load currents for both HHD and SSK fuse types used in Siemens 8DJH and NXPLUS C switchgear. Example calculations illustrate how to match fuse ratings to transformer specifications and how to account for additional cooling fans. This manual is written in Chinese.
| Rated voltage options | 3–7.2 kV, 6–12 kV, 10–17.5 kV, 10–24 kV |
|---|---|
| Minimum fuse current (IHV HRCmin) at 6.3 kV | 22 A |
| Transfer current (Itransfer) at 6.3 kV | 40 A |
| Maximum continuous load for HHD fuse in 8DJH | 37.8 A |
| Maximum continuous load for SSK fuse in 8DJH | 41.8 A |
The SIBA high‑voltage HRC fuses are specified for Siemens 8DJH and NXPLUS C gas‑insulated switchgear.