Standard series
- S11 / S13 / S20 low-loss series — successive generations with reduced no-load and load losses
- Amorphous-alloy S(B)H15 series — no-load loss reduced by 60–80% versus conventional cores
- Hermetically sealed tank, corrugated-fin radiator, no maintenance for the design life
- Voltage classes: 6 / 10 / 11 / 15 / 20 / 22 / 33 / 35 kV to match local grid codes
- Vector group Dyn11 or Yyn0; tapping range ±2×2.5% or ±5% (off-circuit or on-load)
- Fully compliant with IEC 60076; routine and type test reports supplied with every order
Capacity range
30 – 4,000 kVA (three-phase)
Pole-mounted 1φ
3 – 333 kVA, up to 33 kV primary
Impedance
4.0% / 4.5% typical (higher on request)
Standards
IEC 60076 · national grid-code adaptations
Delivery
30 – 45 days
| Type | Rated capacity (kVA) | No-load loss (kW) | Load loss (kW) | Impedance (%) |
|---|---|---|---|---|
| S20-100/10 | 100 | 0.135 | 1.51 / 1.44 | 4.0 |
| S20-200/10 | 200 | 0.215 | 2.19 / 2.08 | 4.0 |
| S20-315/10 | 315 | 0.305 | 3.07 / 2.92 | 4.0 |
| S20-400/10 | 400 | 0.37 | 3.62 / 3.44 | 4.0 |
| S20-500/10 | 500 | 0.43 | 4.33 / 4.12 | 4.0 |
| S20-630/10 | 630 | 0.51 | 4.96 | 4.5 |
| S20-800/10 | 800 | 0.63 | 6.00 | 4.5 |
| S20-1000/10 | 1000 | 0.745 | 8.24 | 4.5 |
| S20-1250/10 | 1250 | 0.87 | 9.60 | 4.5 |
Load losses shown as both tapping extremes where applicable. Full loss tables for every series and voltage class — including amorphous-alloy units — are available on request as PDF datasheets.
