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Workshop Agenda
Registration opens at 8:00 AM. Welcome at 9:00 AM. The workshop adjourns at 4:00 PM.
Topics
8:00 AM – 8:30 AM registration
8:30 AM
Session 1: Current Transformer
Basics about current transformers
An overview of the IEEE C57.13 standard
Constructions and types of current transformer (CT)
Meter and Protection application
Comparison of measurement methods
Application examples
Practical experiences with testing bushing-type CT
Using the automated switchbox to get a comprehensive report for multi-ratio CT
10:00 AM – 10:30 AM Coffee break
10:30 AM – 12:00 PM
Residual Magnetism (Remanence)
What is Residual Magnetism
Causes of Residual Magnetism
Effect of Residual Magnetism
Negative Impacts of Residual Magnetism on Protection system
Determining the Residual Magnetism in a field test
Modeling of transient behavior in dynamic testing program (e.g. Netsim)
Testing of Current Transformer
Winding Resistance test
Excitation Test
Ratio error and phase displacement measurement
Polarity test
12:00 PM – 01:00 PM Lunch
1:00 PM – 2:30 PM
Session 2: Voltage Transformer and their Testing
1. Status Quo and Awareness Raising
2. Basics about Voltage Transformer
An overview of the IEEE C57.13 and ANSI C93.1 standards
Constructions and types of Voltage Transformer (VT)
Coupling Capacitor Voltage Transformers (CCVT)
Components
Comparison of measurement methods
Understanding Nameplate Values
2:30 PM – 3:00 PM Coffee break
3:00 PM – 4:30 PM
3. Testing VT
Model-Based testing approach
Short circuit impedance test
Winding Resistance test
Excitation Test
Ratio error and phase displacement measurement
Polarity test
