Medium Voltage Cable Sizing Calculator ((free)) -

The company’s licensed cable sizing software license just expired, and IT says renewal will take 48 hours. The procurement deadline is in 6 hours. Elena has a spreadsheet, a code, and a stack of ICEA (Insulated Cable Engineers Association) standards.

(ignored for continuous max case—safety first). medium voltage cable sizing calculator

Elena Vasquez, a Senior Protection & Control Engineer with 15 years of experience. She trusts her instincts but verifies with math. The company’s licensed cable sizing software license just

A remote wind farm connection project in West Texas. The site spans 30 square miles. The 34.5 kV collector cables—each 3 miles long—must carry 12 MVA from each turbine cluster to the substation. If she undersizes a cable, it will overheat and fail in 5 years. If she oversizes, the client bleeds $500,000 in unnecessary copper. (ignored for continuous max case—safety first)

Rocky soil (1.2 K·m/W) vs standard (0.9). Correction factor: 0.88.

Her junior engineer, Mark, says, “Can’t we just guess up one size?”

Elena stops him. “You forgot the derates.” A true MV calculator doesn’t just do Ohm’s law. It applies six correction factors sequentially.