About this document
Understanding Time Current Curves by Nalex Gee is a document available to read on EtoBox.
This document provides an overview of time current curves (TCC), which plot the interrupting time of overcurrent devices against current level. It explains how to read a TCC plot, identifying different curves for a switchgear feeder breaker, switchgear main breaker, transformer primary fuse, and transformer and cable damage. It describes how the damage curves indicate the limits to prevent permanent equipment damage, and how coordination of protection devices is designed based on reading the TCC plots.
- Author
- Nalex Gee
- Language
- EN