SGT4 415/1500 kV
Transformer · UK-SGT4 · United Kingdom — Felixstowe
Status
In service
Health
100.0%
Live state
| Status | In service |
|---|---|
| Loading | 6.6% |
| Winding / oil temp | 51 / 33 °C |
| Cooling stage | Onan |
| Tap position | 0 (0.0%) |
| Differential (87T) | 0.0% |
| Gas / Buchholz | clear |
| HV / LV current | 114 A @1.5 MV · 412 A @415 kV |
As-built specification
| Ratio | 1.5 MV ↔ 400 kV, three-phase |
|---|---|
| Rating | 4,500 MVA per bank |
| Impedance | ~12% on rating |
| Tap changer | on-load, ±9 steps × 1.25% (±11%) |
| Cooling | ONAN → ONAF → OFAF (staged) |
| Efficiency | ~98–99% |
| Redundancy | nominal + 1 spare (graceful de-rate) |