Monday: Equipment Track

Monday |  Equipment Track

9:30 AM–10:15 AM 
Best Practices for Electrical Inspection Using Ultrasound & Infrared

Speaker: Adrian Messer, UE Systems

Ultrasound and infrared technologies are a perfect match when conducting inspections of energized electrical equipment.  At any voltage, thermal anomalies and sources of ultrasound such as tracking and arcing can occur.  Corona can also occur at 1000 volts and greater.  Any of these conditions threaten the reliability of the equipment being inspected.  Typical electrical components that can be inspected with ultrasound and infrared include switchgear, load interrupter switches, breakers, transformers, motor control centers, and terminal transition cabinets.  This presentation will provide information on how using both ultrasound and infrared together for electrical inspections can allow for more problems to be found sooner, and we will also discuss how safety is increased when using ultrasound to scan enclosed electrical equipment prior to opening for further inspection.AS a further complement to infrared inspections, and to aid in the proper diagnosis of the condition heard, recorded ultrasound examples will be played in both the FFT and Time Wave Form in a spectrum analysis software to show how to properly diagnose electrical anomalies.  This will allow the attendees to hear what corona, tracking, and arcing sound like when performing an ultrasonic inspection.  The associated infrared images from these faults will also be shown.

10:30 AM–11:15 AM
Counterfeiting: A Problem You Probably Don’t Know You Have

Speaker: Jim White, Shermco Industries

Each year billions of dollars of counterfeit products are sold globally.  In the US alone estimates run from $250 million to $600 million.  The problem is so large US Customs and Border Patrol can’t get a set figure.  UL and NEMA have formed an alliance to help fight this problem.  Find out more in this quickly-moving paper.

11:30 AM–12:15 PM
Bridging Instrument Calibration and Process Reliability

Speaker: John E. Couturier, Energy Northwest

The primary function of calibration is to provide the users of test equipment the assurance that the instruments they rely on to provide quantitative and qualitative measurement results during electrical testing are accurate and precise.  We often think of calibration as a stand-alone function without seeing the bigger picture.  If the 'calibrated test equipment used' box is checked, we move on to the next step, and often times don't circle back to calibration, even if there was a problem with the test.  But, if calibration were regarded as an integral part of the complete testing process, the information provided via the calibration could, and should, become valuable information when trying to prove, or disprove reliability.  In this presentation, we'll break down the documentation provided in an ANSI/NCSL Z540 calibration, and provide insight on how that information can be used to help determine reliability of the equipment based on the calibration performed.  The goal is to not just file that Certificate of Calibration away in a drawer, never to be seen again, but to use the documentation to bolster the test results if there were anomalies, or the possibility of uncertainty, associated with the testing process.  The attendee will come away with the understanding of how the calibration of test equipment used to perform electrical testing can, and should, be used as evidence of a reliable testing process.  

2:15 PM–3:00 PM
First Trip Testing – Assessing Circuit Breaker Mechanism Health

Speaker: Michael Wolf, Doble Engineering Company

After long periods sitting idle in the closed position, the lubrication in a circuit breaker mechanism can become compromised. By monitoring information from the mechanism during the very first open operation after a long idle period, the impact of any dried or defective lubrication, control scheme problem, or a variety of other mechanism issues can be captured. This paper will provide a high level review of first trip testing and include case studies to support its value in a maintenance program.

3:15 PM–4:00 PM
LV Circuit Breaker Ground Fault Protection: Testing Challenges Using Primary Injection

Speakers: Aaron Tucker and Daniel Carreno Perez, Megger

Selective coordination of a power system can be a large investment to ensure that the system is protected and power is maintained properly. Part of the commissioning standards and maintenance procedures of low voltage circuit breaker testing is to determine if the circuit breaker is able to respond correctly to the faults or overloading conditions set in the coordination study.

When this coordination study includes ground fault as a part of the low voltage circuit breaker protection scheme, the best approach to test these elements is with primary injection. There are various techniques for detecting a ground fault in low voltage circuit breakers such as Residual Earth-Fault, Zero Sequence, Neutral Protection, and Earth Leakage. Testing with primary injection ensures that the applicable current transformers (CT’s), main contacts, wiring, and trip unit are tested together as one complete circuit.

This presentation will cover the challenges of ground fault testing of low voltage molded case and power circuit breakers using primary injection such as cable length, power sources, breaker configurations, CT polarity, CT sizing, and why primary injection is specified per NEC standards and NETA.

4:15 PM–5:00 PM
IEEE C37.23-2015 Standard for Metal-Enclosed Bus – What You Need to Know and Why

Speaker: Steve Powell, Electrical Builders, Inc.

The purpose of this presentation is to understand where to find information about bus standards, what it means and why it's critical. Bus systems such as Isolated Phase Bus, Segregated Phase and Non-Segregated Bus are installed in power plants around the world and are one of the only non-redundant systems connecting generators, transformers and switchgear. Failure due to a bus system fault means a costly unplanned outage. Understanding design requirements, service conditions, ratings, temperature limitations, and test procedures are an important part of ensuring the installed bus system meets quality and dependability requirements. Outline of Agenda: What is the standard for metal enclosed bus and who defines it? What changed in the latest release? Where to find critical information, Understanding the standard; what are temperature limitations, short circuit ratings, etc. Explaining the standard in layman's terms: How the standard applies to bus systems and why you need to know.