Wednesday: Afternoon Technical Seminars

Wednesday: Afternoon Technical Seminars

1:15 PM-5:00 PM
Working Principles, Testing, and Maintenance of Transformers

Speakers: Tom Sandri, Shermco Industries

With an understanding of the construction and maintenance of transformers, you will be able to make informed decisions about the performance and operation of this costly piece of equipment. This transformer workshop provides a comprehensive overview of electrical transformers found in the industry. The workshop shall serve as a fundamental overview covering basic transformers theory, applications, construction, maintenance, and testing.  During the workshop the attendee will begin with magnetism and electromagnetic induction.  We will progress into the working principles of transformers, performance, configurations and ratings.  Next, we will explore the NETA required testing defined in the Acceptance and Maintenance standards.  At the end of the workshop we will review the importance of demagnetization of power transformer cores.

1:15 PM-5:00 PM
Partial Discharge Measurement on Rotating Machines

Speakers: Matthew Sze and Patrick Zander, OMICRON electronics Corp. USA


Rotating machines, such as motors and generators, are highly important components in power generation and industrial applications. Premature failure, causing lower availability and reliability, may lead to significant economic losses due to unexpected outages and possible damage to the asset itself. To plan maintenance effectively, it is essential to have accurate condition information about when and which component needs repairing or replacing.

Among a variety of electrical tests, insulation testing are considered one of the most important test to assess the defects/ deterioration of the machines, commonly done after the machine has been manufactured, installed on-site or during periodic maintenance checks – In this workshop we focus on:

Offline diagnostic tests, such as:

    • Capacitance/ power factor measurement

Variations in C and DF/PF over time are often signs of partial discharges (PD) or insulation degradation

    • Partial Discharge measurement

Where the local electric field stress exceeds the local electrical strength. It causes a progressive erosion of insulation materials that can lead to failure.

Online Partial Discharge measurements/ monitoring, involving:

    • Temporary PD monitoring

Which is used for periodically observe changes in PD activity

    • Permanent PD monitoring

Continuously assesses PD activity over the entire service life of a machine, especially for asset with high criticality.

We are also going to discuss:

  • International standard
  • Interpretation of measurement results
  • Measurement setup
  • Advanced noise/ signal separation technique
  • Case studies
  • Live demonstration with stator bar

1:15 PM-5:00 PM
Power Quality Seminar

Speakers: Ross Ignall, Dranetz


  • Introduction to Monitoring
  • What Are We Measuring?
  • Transducer Considerations
  • Introduction to Power Monitoring

Update to previous Power Quality Seminar presented at PowerTest 2018

1:15 PM-5:00 PM
Best Practices for Battery Testing and Maintenance

Speakers: Volney Naranjo and Dinesh Chhajer, Megger

With the existing regulations, power quality and service standards, stationary batteries are a key component of most electrical systems. Then, the battery health and its maintenance is without discussion a topic of concern and it is critical to educate battery maintenance personnel about the different batteries commonly used and the recommended practices to test and keep these systems in a healthy operating condition.

The seminar will cover the lead acid battery fundamentals, common maintenance and operations practices, failure modes & prevention, and pros & cons of lithium-ion batteries.  It will focus on practical side of batteries, why lead-acid batteries reign in industrial standby power back-up market, and future of lithium-ion batteries in standby applications.

For the maintenance activities, special focus will be given to the performance (capacity) test presenting the different aspects to take into account before and while running the test as well as the analysis beyond the capacity result. For the ohmic testing, impedance measurements will be used to explain how to define baseline values, how to evaluate results from one single test, and trending the measurements or comparing them to the baseline value.

This seminar will provide attendees with the necessary information to review and improve a battery maintenance program and practices, as well as to obtain the most out of the results to comply with the regulations and guarantee the proper operation of the stationary batteries in a substation.