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Relaying Current Transformer Application Guide

by @ 8:17 pm on December 3, 2008. Filed under Electrical engineering

File : pdf, 1.6 MB, 54 pages
by Wecc

TOC

1. Current Transformer Characteristic
Core Construction
Exciting Currents
Remanence
Thermal Ratings

2. Current Transformer Burden
Internal Resistance of CT
Effect of CT Connections
Effect of Auxiliary CT

3. Estimates of Transient Performance

4. Performance Requirements of Current Transformers for Relaying Purpose
Distribution Feeders Phase and Ground Overcurrent
Differential for Buses, Transformers and Generators
Directional Overcurrent and Distance
EHV Transmission Line Systems

5. Example of Calculations
Ratio and Phase Angle Error of CT
Estimation of Current Transformer Performance
ANSI CT Relaying Accuracy Classes
Effect of Current Transformer Connections on Burden
Estimates of Transient Performance

6. Reference

Download     :     pdf1

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