SC(B)H15 Amorphous Dry Transformer: Loss, Cooling and Protection
Reviewed by the Fengguang engineering team · Last updated 10 Nov 2026
Amorphous-alloy cores cut no-load losses in low-load, long-running duty. This guide covers the selection inputs, typical configuration and the questions to settle before the datasheet is approved.
Losses
Compare guaranteed no-load and load loss at the reference temperature. The right loss level depends on the load profile, tariff and service life, not only the model name.
Cooling
Natural cooling is simpler; forced cooling adds capacity but also fans, auxiliary power and maintenance. State the ambient and altitude so the cooling stage is correct.
Protection
Confirm impedance, earthing, relay settings, cable entry and surge protection. The transformer must coordinate with the upstream and downstream protection.
Questions to settle before the datasheet
Confirm the load profile, voltage ratio, tap range, impedance, fault level, cooling stage, ambient, altitude, enclosure, corrosion class, termination and test scope. These are the inputs that change the design.
Acceptance checks
Check the nameplate data, routine test report, dimensions, weight, painting, accessories and packing against the approved drawing. For critical projects, add a witnessed test and a document review.
| Input | What to confirm |
|---|---|
| Capacity | kVA and load profile |
| Voltage | Class, ratio and tap range |
| Losses | No-load and load loss |
| Cooling | ONAN/ONAF or AN/AF |
| Environment | Ambient, altitude, IP and corrosion |
FAQ
How do I choose a SC(B)H15 Amorphous Dry Transformer?
Start from maximum demand, voltage class, fault level and site conditions. Then compare losses, cooling, dimensions and protection as a system.
Can the transformer be customised?
Yes. Winding material, losses, cooling, terminals, enclosure and finish are project options, confirmed on the approved datasheet.
What should be in the quotation?
Guaranteed losses, impedance, tap range, cooling stage, dimensions, weight, test scope, documents and delivery basis.
What is the most common selection error?
Sizing on connected load, ignoring ambient/altitude, or comparing models only on purchase price instead of total owning cost.
Related pages
Need this applied to a project?
Send the application, voltage class and site conditions through the inquiry form. The team will check the transformer family and the document scope.
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