An interactive tutorial

TCC & Selective
Coordination

Learn how to read Time-Current Curves and coordinate overcurrent protective devices — by watching real curves move under your fingertips. Built for electrical engineering students and early-career engineers.

Start Lesson 1 → Open Sandbox

Course Outline

Module 1

TCC Anatomy

Build the literacy to read any TCC.

  1. L1 Reading a TCC
  2. L2 Fuses on a TCC
  3. L3 Breakers on a TCC

Module 2

Coordination

See curves overlap and fix them.

  1. L4 What is Selective Coordination?
  2. L5 Two-device Coordination
  3. L6 Three-device Coordination

Module 3

Damage Curves

Why miscoordination causes real damage.

  1. L7 Cable Damage Curves
  2. L8 Transformer Damage Curves