Monday: Relay Track

Monday |  Relay Track

9:30 AM–10:15 AM 
Why Are You Still Testing Relays Like Your Grandfather Did?

Speaker: Will Knapek, OMICRON electronics Corp. USA

As protection relays have evolved from electro-mechanical (EM) relays to microprocessor based relays why have we continued to test relays like we did a generation ago?  This paper will explore what we have historically done to test relays and where we need to go in the future.  As the technology for protecting the power systems as evolved, the process of testing the protection must also evolve We explore the shift in traditional relay testing to a more complete system test. 

Test the logic of the relay, not the capability of the microprocessor to perform math.  As the technology for protecting the power systems as evolved, the process of testing the protection must also evolve.  The protection devices that are in service are moving away from electromechanical devices to intelligent electronic devices the methods of testing need to be updated.  No longer is it applicable to test the capability of the modern relay to perform the mathematics of calculating the proper timing of an overcurrent element or the proper impedance characteristic in a distance element.  This paper will explore the testing practice of system testing and learn how to apply them. 

10:30 AM–11:15 AM
Traveling Wave Relay Application, Commissioning, and Initial Experience

Speaker: J Scott Cooper, OMICRON electronics Corp. USA

During the last few years, numerous theoretical papers have been written about the prospective advantages of applying sub-cycle line distance protection and fault location using traveling wave and superimposed components.  As this technology is new, information on its deployment to the field is limited.  This presentation provides a technician level overview of traveling-wave and superimposed-component distance protection, commissioning strategies, and initial results at a trial project of the technology on the Salt River Project System.

11:30 AM–12:15 PM
Analysis of Selected Motor Event and Starting Reports

Speaker: Ryan McDaniel, Schweitzer Engineering Laboratories

Motors are estimated to be one of the most numerous components of the electric power system. As the device that takes electrical energy and converts it to the mechanical energy needed to power processes, a motor that is unnecessarily out of service can bring an entire process to a halt, resulting in a significant loss of revenue. Conversely, the expense and time to replace a large motor damaged beyond repair mean that failing to quickly and dependably protect a motor is also a concern. Because there are many common failure modes (mechanical, electrical, thermal, and so on), root-cause analysis of a motor failure can be involved.This paper investigates several real-world events with data from both motor starting reports and event records. The data demonstrate the value of having devices capable of recording motor data during starts and fault events and of capturing and reviewing such data for the purpose of determining root cause. Lessons learned are shared to help in troubleshooting motor problems and to avoid potential misoperations in motor protection.

2:15 PM–3:00 PM
The Nuances of Testing Electromechanical Relays with Digital Relay Test Equipment

Speaker: Glenn Louis Goldfarb, ABB


All of the elements in respect to electromechanical (EM) relay protection maintain its best behavior at low current and the worst performance at higher currents. When electromechanical and some solid state relays were first introduced decades ago, digital relay test equipment was not available. The only method for testing was the use of 120V phase- to-neutral and 208V phase-to-phase utilizing conventional load banks, phase shifter, meters and a traditional test bench.  

Learn about the difference and pitfalls when using older conventional test methods described in the relay instruction leaflets as compared to using digital relay test equipment.


3:15 PM–4:00 PM
Beyond Relay Testing: Things to Check to Ensure Proper Relay Application

Speaker: Vignesh Palanichamy, Sentinel Field Services, LLC

Protective relays are one of the important components in power system. The protective relays along with circuit breaker/contactor, current transformer, voltage transformer, AC/DC control circuits play a vital role in protecting equipment and personnel against short circuit and arc flash faults. Due to its importance, protective relay testing is often included in acceptance and preventive maintenance programs. Very rarely the person who designed the settings will be the person testing them. So, the relay tester will only be testing the relay to the set parameters and may not aware if the parameters are correct. This presentation provides several items that the relay tester can verify which will ensure proper relay application. Identifying and fixing these items will prevent catastrophic damage to equipment and provide proper personnel protection.     

4:15 PM–5:00 PM
PV Generation Interconnection & Protection

Speaker: David Morrissey, American Electrical Testing Co., LLC

This presentation will provide a brief overview of the processes required to interconnect PV Distributed Generation systems for initial design, through commissioning and energization. I will cover specific topics such as design and programming challenges, as well as testing and commissioning requirements, including utility witness testing. A portion of the presentation will also cover several of the different requirements we have seen across different systems, and with various utilities. Towards the conclusion of the presentation I will also cover some lessons learned, and take the opportunity to field a few questions from the attendees.