SC(B)13 vs SC(B)14 vs SC(B)18: Loss Levels and Payback

SC(B)13, 14 and 18 are all cast-resin dry-type families, but they sit at different loss levels. Compare guaranteed losses and payback, not just the model name.

Same family, different loss targets

The SC(B)13, SC(B)14 and SC(B)18 families share a cast-resin insulation concept but target different loss levels. A higher number is generally positioned at a lower loss / higher efficiency point, but the exact values depend on rating, voltage class and design. Ask for the guaranteed no-load and load loss at the reference temperature.

Payback calculation

Estimate annual energy cost from no-load loss × 8,760 hours and load loss × equivalent full-load hours. Multiply by the tariff and compare the difference between models. For a data centre or a high-load factory, the lower-loss unit can pay back faster; for a lightly loaded unit, the difference may be small.

Do not forget the physical envelope

A lower-loss design can be larger or heavier. Check the room dimensions, floor loading, cable entry and transport route. The best loss value is useless if the unit does not fit.

FAQ

Is SC(B)18 always better than SC(B)13?

It has lower losses, but it may cost more and be larger. The right choice depends on load profile, tariff and available space.

Can I compare losses directly?

Only at the same rating, voltage class and reference temperature. Ask for a like-for-like table.

Do these models need forced cooling?

They are typically naturally cooled, with forced-air options for short-time overload. Confirm the rating basis.

Related pages

• SC(B)14 dry-type transformers
• SC(B)18 dry-type transformers
• Photovoltaic solutions