For Oil Distribution and Dry-type transformers (≤ 3150 kVA):

• Losses levels to be applied (reference of MV ≤ 24 kV and LV ≤ 1.1 kV).

• ODT and CRT not covered by reference transformers (additional losses allowed compared to standard losses ranges):

• Medium power and power transformers: Level of Peak Efficiency (Mix of load losses and no load losses) for transformers > 3150 kVA (limited to 10 MVA 36 kV for Dry-type Transformers)

- No losses levels imposed but minimum PEI (Peak Efficiency Index)
- PEI corresponds to:
- the maximum efficiency of the transformer
- Ratio between the no load losses and losses

The values given are Maximal value; no more tolerances on design considered:

Released for:Schneider Electric South Africa