⚡ IEEE C57.110 K-4 / K-9 Transformers (IGBT Rectifier Harmonic Eddy Current Loss)

Commercial EV Transformer K-Factor & Derate Calculator

Size step-down substation distribution transformers dedicated to high-power DC fast charger rectifiers under ANSI/IEEE C57.110: calculate required K-factor rating (K-4 or K-9 handling high-frequency 6-pulse/12-pulse converter harmonic heating), thermal de-rating margins, and commercial substation engineering profits.

1. Project & Operating Inputs

Connected DC Fast Charger Capacity (kW DC e.g. 1,500 kW Total Load)

Harmonic Current Distortion (THDi % e.g. 12.0% THDi from Rectifiers)

Customer Bid Price for Supplied & Rigged K-Factor Transformer ($)

K-9 Copper Windings, Pad-Mount Enclosure, Primary Switch & Electricians ($)

2. Financial Breakdown & Yield

IEEE C57.110 EV TRANSFORMERS

Turnkey Substation Package Profit

Medium Voltage Substation Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost