Advancements in the Industry: Determining Cellulose Degradation in Transformers Using Indirect Tests

Lance R. Lewand and David Koehler, Doble Engineering Company Fall 2021 CAP Corner, CAP Corner

The design life of a transformer is usually about 20 to 25 years. In the United States, estimates show the average age of a transformer is currently around 42 years, which means a number of even older units are still in service. As with all things, transformers age and degrade over time. Transformer failures can come from a variety of …

Advancements in the Industry: Simplifying the Testing of Automation and Control Systems

Eugenio Carvalheira and Andreas Klien CAP Corner, Summer 2021 CAP Corner

During the life cycle of a substation automation system (SAS), it takes considerable effort and time to test the communication, interlocking logic, and proper operation of all signals transmitted to supervisory control and data acquisition (SCADA) systems. In a substation that makes use of IEC 61850 communication, all the engineering and configuration data can be saved in standard-format files — the …

Insights & Observations — NETA CAP Spotlight Utility Relay Company: Leading-Edge Solutions to Real Problems

NETA World Staff CAP Corner, Summer 2021 CAP Corner

NETA’s Corporate Alliance Partners (CAPs) are a group of industry-leading companies that have joined forces with NETA to work together toward a common aim: improving quality, safety, and electrical system reliability. Our continuing CAP Spotlight series highlights some of their individual successes. In this issue, NETA World interviews Brian Bianchi, Director of Sales and Marketing at Utility Relay Company. NW: …

A Technician’s Approach to Impedance-Based Protective Elements

Ralph Parrett CAP Corner, Spring 2021 CAP Corner

A power system uses  various  elements within protective relay schemes, and having a thorough understanding of the theory behind these protective elements is more than useful — if not required — for anyone who comes in contact with them. Design engineers who must execute calculations based on system characteristics and machine capabilities and field technicians who conduct testing, calibration, and …

AVO Training Institute: Providing Customer Training in the Safest Possible Environment

NETA World Staff CAP Corner, Spring 2021 CAP Corner

NETA’s Corporate Alliance Partners (CAPs) are a group of industry-leading companies that have joined forces with NETA to work together toward a common aim: improving quality, safety, and electrical system reliability. In our continuing CAP Spotlight series, we highlight some of their individual successes. In this issue, NETA World interviews Ralph Parrett, Manager of Content & Delivery, at AVO Training …

PF Measurements On Complete Stator Windings

Mathieu Lachance CAP Corner, Winter 2020 CAP Corner

Power factor (PF) measurement has been performed on stator windings for many decades and is a widely accepted and recommended tool to assess the insulation system of individual bars/coils and for complete stator windings. The test is known to be sensitive to several global defects such as the degree of curing of the bonding materials, moisture ingress, contamination, and thermal …

AEMC® Instruments: Over 125 Years of Technical Heritage and Innovation in Test Instrumentation

NETA World Staff CAP Corner, Winter 2020 CAP Corner

NETA Corporate Alliance Partners (CAPs) are a group of industry-leading companies that have joined forces with NETA to work together toward a common aim: improving quality, safety, and electrical system reliability. In our continuing CAP Spotlight series, we highlight some of their individual successes. In this issue, NETA World interviews John Olobri, Director of Sales and Marketing for AEMC® Instruments …

Onsite PD Measurement During Commissioning: Safe…Right From the Start

Mathieu Lachance and Tim Gannon CAP Corner, Fall 2020 CAP Corner

Partial discharge (PD) measurement has been used for several decades to assess the condition of high-voltage (HV) and medium-voltage (MV) electrical apparatus. In the past, PD measurements were largely limited to the production stages of various assets (e.g., during R&D, factory-type tests, and factory acceptance tests). However, the advantages of such testing have resulted in it being used more often …

Weidmann: 143 Years of Global Impact

NETA World Staff CAP Corner, Fall 2020 CAP Corner

NETA Corporate Alliance Partners (CAPs) are a group of industry-leading companies that have joined forces with NETA to work together toward a common aim: improving quality, safety, and electrical system reliability. In our CAP Spotlight series, we look at what makes CAPs special and highlight some of their individual successes. In this issue, NETA World interviews Francis Fisher, head of …

Testing and Commissioning Digital Protective Relays

Drew Welton CAP Corner, Summer 2020 CAP Corner

The proven advantages of digital technology for power system protective relays are now commonplace in the power producing and delivery industry. Digital relays provide unsurpassed reliability and extended capabilities at an economical cost. However, keeping pace with the testing and commissioning requirements of these devices has proven to be a challenge for both protective relay engineers and technicians. Although testing …