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Trusted Transformer Know-How
Free Electrical Calculators, Guides & Expert Support

For more than 20 years, Delta Wye Inc. has helped engineers, contractors, and facility teams make faster, code-aware electrical decisions. Our Know-How hub brings together transformer calculators, practical guides, and field-tested best practices—so you can size equipment, check voltage drop, convert kVA ↔ Amps, and validate conduit fill & ampacity with confidence across Canada and the United States. Built in Ontario and grounded in CSA/IEEE standards, our mission is simple: deliver accurate, easy-to-use tools and high-performance transformer solutions that minimize downtime, improve efficiency, and extend the life of critical power systems.

Delta Wye • Know-How Calculators
Formulas: 1-φ: I = (kVA × 1000) ÷ (V × PF).   3-φ: I = (kVA × 1000) ÷ (√3 × V × PF). If PF blank, unity (1.0) is assumed.
Relations: kW = kVA × PF. Optional amps: I = (kW × 1000) ÷ (V × PF) for 1-φ; I = (kW × 1000) ÷ (√3 × V × PF) for 3-φ.
Enter any two to solve the third. V = I × R.
Ideal relation (ignores losses): Vp/Vs = Np/Ns.
Uses typical DC-resistance values at ~75 °C for common sizes (Ω/1000 ft). 1-φ path ≈ 2 × length; 3-φ ≈ √3 × length. Reactance ignored for quick estimates. Verify against local code, temperature rating, installation method, and manufacturer data.
Fill uses typical internal areas (in²) and THHN/THWN-style conductor areas for a quick check. Ampacity baseline approximates NEC 310.16 (75 °C column); applies common adjustment factors for ambient and # of CCC. Always verify against the latest code, terminal temperature limits, installation conditions, and manufacturer data.
Always verify results to current code and manufacturer data.

Explore Our Full Range of Solutions

At Delta Wye Inc., we provide end-to-end transformer and power solutions designed to keep your operations running at peak performance. Our services cover every stage of the equipment lifecycle, including transformer sales, rentals, preventative maintenance, and expert repairs.

Backed by advanced diagnostic tools and proactive service strategies, we help extend equipment lifespan, minimize costly downtime, and improve overall efficiency. Whether for industrial or commercial applications, our team delivers fast, reliable, and cost-effective support tailored to your specific needs.

Proudly serving clients across Canada and the U.S., we uphold the highest standards of safety, compliance, and sustainability. Every Delta Wye product meets or exceeds CSA and IEEE requirements, ensuring dependable, high-performance power solutions you can trust.