CYMTCC understands electricity. When you draw a line, it calculates impedance. When you place a fuse, it knows the melt time. This tutorial focuses on version 4.x and above, but the workflow applies to older builds.

(CYME Time-Current Curves) is a specialized electrical engineering application developed by Eaton for creating, viewing, and coordinating time-current characteristic (TCC) curves for protective devices. This software is essential for protection engineers ensuring selective coordination in industrial, commercial, and distribution power systems. Getting Started with the CYMTCC Interface

: Access over 15,000 devices (fuses, breakers, relays) from the integrated database . 3. Configuring Protection Settings

Pro tip: Use the (magnifying glass icon) to click a point on a curve. It shows “At 5,000A, device clears in 0.12 seconds.”