Wednesday: Morning Technical Seminars

Wednesday: Morning Technical Seminars

8:00 AM-11:45 AM
Transformer Testing Theory and Case Studies

Speaker: Michael Wolf, Doble Engineering Company

Description:
When testing transformers, a working knowledge of the “meaning” behind the test results can allow the tester to identify possible setup problems, undertake troubleshooting steps, and ultimately make a smart decision about the health of the transformer. This presentation will review the theory and data interpretation of common transformer tests including power factor and capacitance, excitation, turns ratio, and winding resistance. The main focus of the presentation will be on reviewing case studies to illustrate the defects and damage that can be discovered during testing.

8:00 AM-11:45 AM
Changes to the 2021 NFPA 70E

Speakers: Jim White, Shermco Industries; Daryld Ray Crow, DRC Consulting Ltd.; Daleep Mohla, DCM Electrical Consulting Services

Description:
It’s that time again!  The 70E is so integral to everyday work life that people wait with anticipation as to what it will contain.  Will the changes be good?  Will the changes be not-so-good?  Will the standard be any more understandable?  How will they affect my job performance or, if you manage a business, your bottom line?  This tutorial covers the most important changes that have been accepted by the Committee and should answer all of these questions; maybe more.  Presented by thee of the Committee members.

8:00 AM-11:45 AM
Electrical and Current Signature Analysis of Motors and Generators

Speakers: Howard Penrose, MotorDoc LLC

Description:
In this workshop we will discuss the application of electrical and current signature analysis for the detection of electrical and mechanical faults in electric motors, generators and related powertrain.  The workshop is technology non-specific and will discuss common detection of faults through voltage, current and torsional spectral analysis.  Included are: stator condition, rotor condition, bearings, coupling, common fan and pump issues, gearbox, power quality and control conditions with case studies.  Attendees will have an understanding of the capabilities and basic analysis using electrical and current signature analysis and the technology's full capabilities.

8:00 AM-11:45 AM
Understanding Transformer Protection: Application and Testing

Speakers: David Beard/Mohit Sharma, Megger

Description:
Transformers are one of the most critical components of the power system. Isolating the transformers from different faults requires an ideal balance of sensitive and selective protection scheme. This seminar provides a detailed explanation on the fundamentals of transformer protection applications and their testing methodologies in the field. Various protection functions such as over current, differential, harmonic blocking, and restricted earth fault are discussed in detail in this seminar. This seminar also covers various challenges in implementing effective transformer protection scheme based on different transformation ratio, type of transformer connection, secondary current transformer connections. It also discusses the industry practices for eliminating zero sequence current elimination, CT saturation due to high magnitude external faults and over excitation conditions with using different relay manufacturers.

In addition, this seminar will provide attendees with knowledge on how to test various elements on a differential protection relay.