# Ferranti effect

> English word · Noun

## Definitions
1. An increase in voltage occurring at the receiving end of a long transmission line, above the voltage at the sending end. This occurs when the line is energized, but there is a very light load or the load is disconnected. The capacitive line charging current produces a voltage drop across the line inductance that is in-phase with the sending end voltages considering the line resistance as negligible.

## Etymology
First observed during the installation of underground cables in Sebastian Ziani de Ferranti's 10,000 volt distribution system in 1887.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/ferranti-effect