Resources
for Specs.
Guides for transformer sizing, winding configurations, feed arrangements and insulating oil. Built for buyers, engineers and contractors who need clear answers before they quote.
Start with
the basics.
Four topics we get asked about most: three technical guides, including a working kVA sizing calculator, plus our STRATA X3 oil page with current specs.
Transformer Sizing
Match kVA to load for single-phase and three-phase units. Use the 1φ/3φ kVA calculator, then check standard kVA sizes and full-load amp tables.
Read the guide →Delta vs. Wye
How to read winding configurations and nameplate voltage strings (for example 12470Y/7200 · 480Δ), plus neutrals, grounding and common pairings.
Read the guide →Loop Feed vs. Radial
Pad-mount primary feed options: bushing counts, how loops run, switching and fusing, and how feed details show up on BPS listings.
Read the guide →Transformer Oil
STRATA X3 Type II naphthenic mineral oil. Drums and totes ship same day; tanker loads in as little as 4 days. SDS and TDS on the oil page.
View STRATA X3 →
- DAVIS-MONTHANAir Force Base
- FAIRCHILDAir Force Base
Ready to
spec a unit?
Send kVA, primary and secondary voltage, quantity and where it’s going. We’ll check stock and give you a lead time. UL Listed options available when the job needs them.