Symmetrical Components & Fault Visualizer
Decompose unbalanced three-phase systems into positive, negative, and zero-sequence networks — then drive fault current through them and see every sequence quantity update in real time.
Overview
Symmetrical components are the mathematical backbone of every short-circuit study, relay coordination file, and arc flash report produced today. This lab builds genuine intuition by letting you manipulate a live sequence-network solver: choose a fault type (3-phase, SLG, LL, DLG), set grounding method (solid, ungrounded, or high-resistance), adjust source strength and transformer impedance, then watch phasor diagrams, waveforms, sequence-current tables, and network block diagrams all update simultaneously. Seven tabbed workspaces cover the full topic arc — from the conceptual overview of positive/negative/zero sequences, through hands-on fault exploration and design challenges, to a graded quiz. Field-relevant presets let you jump instantly to textbook scenarios. Whether you are studying for the PE exam, preparing for a NETA certification, or building engineering intuition for a protection study, this visualizer makes abstract math tangible.
App preview
A live look at the app you'll launch — every control on the left drives the visualizations on the right in real time.
Inside the lab
What you'll do
- 01Explain why any unbalanced phasor set can be decomposed into three balanced sequence sets
- 02Identify which sequence components are present for each of the four fault types (3-phase, SLG, LL, DLG)
- 03Trace fault current through positive-, negative-, and zero-sequence networks connected in series or parallel
- 04Predict how grounding method (solid / ungrounded / HRG) changes zero-sequence current and ground fault magnitude
- 05Read and interpret phasor diagrams and sequence-current tables in the context of a real fault study
- 06Apply symmetrical-components theory to protection and coordination decisions
Who it's for
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