ETT Study Guide Book 3: Component Testing
J. Instrument Transformers
1. Properties and Types
Identify properties, types, and applications 2, 3, 4
- IEEE C57.13 IEEE Standard Requirements for Instrument Transformers 3 4
- IEEE C37.110 Guide for the Application of Current Transformers Used for Protective Relaying Purposes 4
- Instrument Transformer Basic Technical Information and Application
- Current Transformer Basics: Understanding Ratio, Polarity, and Class
- The Basics of Instrument Transformers
- Current transformers
- Current and voltage transformers (CTs and VTs) as protection’s eyes and ears
- Instrument transformers (CTs, VTs) in the system
- Capacitive Voltage Transformers (CVT) For HV Measurements
- Current and voltage sensors as an alternative to traditional CTs and VTs
- Best Practices for Setting Transformer Differential Protection CT Compensation
- Coupling Capacitor Voltage Transformers (CCVTs)
2. Inspection and Test Procedures
Apply visual and mechanical inspections 2, 3, 4
- Current Transformers A Forgotten Piece of the Relay System
- Current Transformer Grounding
Employ methods and procedures for electrical tests 2, 3, 4
- 6 electrical tests for Current Transformers explained
- Back to the Basics: Current Transformer Testing
- Testing Potential Transformers
3. Interpretation of Test Results
Evaluate results of electrical tests 2, 3, 4
- NETA-ATS 2017: Section 7.10 Instrument Transformers 2 3 4
- NETA-MTS 2019: Section 7.10 Instrument Transformers 2 3 4
- Inspection and Test procedures for Instrument Transformers
- Apparent Burden
Last Update: Aug 21, 2023
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Guide Table of Contents, Book 3
- Book 3 Overview
- A. Switchgear and Switchboard Assemblies
- B. Transformers
- C. Cables
- D. Metal-Enclosed Busways
- E. Switches
- F. Circuit Breakers
- G. Circuit Switchers
- H. Network Protectors
- I. Protective Relays
- J. Instrument Transformers
- K. Metering Devices
- L. Regulating Apparatus
- M. Grounding Systems
- N. Ground-Fault Protection Systems
- O. Rotating Machinery
- P. Motor Control Centers and Motor Starters
- Q. Adjustable-Speed Drive Systems
- R. Direct-Current Systems
- S. Surge Arresters
- T. Capacitors and Reactors
- U. Outdoor Bus Structures
- V. Emergency Systems
- W. Automatic Circuit Reclosers and Line Sectionalizers
- X. Fiber-Optic Cables
- Y. Insulating Liquids and Gases
- Z. Fuses
- AA. Electric Vehicle Charging Systems