⚡ IEEE C57.13 CT Accuracy Classes (C100, C200, C400, C800), Secondary Burden Ω

Current Transformer (CT) Saturation Calculator

Model protective relay current transformer (CT) accuracy and prevent magnetic core saturation during severe asymmetrical short-circuit faults under IEEE C57.13: calculate total secondary circuit burden impedance (Ohms = relay impedance + secondary lead resistance + CT internal resistance), verify C-class voltage compliance (e.g., C400/C800), and testing profits.

1. Project & Operating Inputs

CT Relay Circuits Verified (Circuit Count e.g. 24 CT Sets)

CT Secondary Lead Length (Feet e.g. 350 ft #10 AWG to Relay Panel)

Customer Invoiced Fee for CT Excitation Curves & Burden Study ($ / Set)

Omicron CT Analyzer, Ratio & Polarity Test Set, Protection Specialist ($)

2. Financial Breakdown & Yield

IEEE C57.13 CT BURDEN & SATURATION

Turnkey CT Testing & Study Profit

Protection Engineering Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost