Insulating Fluids Subcommittee C57.104, IEEE Guide for The Interpretation of Gases Generated in Oil-Immersed Transformers (DGA) has undergone a significant revision that completely changes how DGA results should be interpreted for mineral-oil filled transformers. The last time the guide was revised was 2008. It has gone through numerous draft versions and multiple ballots, and hundreds of comments have been reviewed. …
Protec Equipment Resources: Large Enough to Serve Your Needs, Small Enough to Care
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 successes. In this issue, NETA World interviews Cody Richards, Protec’s Vice President …
Three Tips to Reduce Wasted Time When Testing Transformers
Performing offline electrical tests on transformers can be time consuming, especially when field measurements are not captured correctly the first time. This article identifies the electrical transformer test that technicians often struggle to perform efficiently and correctly and offers three field testing tips to address the issue. Building awareness can help test equipment users avoid situations where a significant amount …
Emerging Technologies
Wikipedia defines emerging technologies: “Emerging technologies are technologies that are perceived as capable of changing the status quo. These technologies are generally new but include older technologies that are still controversial and relatively undeveloped in potential.” In this issue, we look at some emerging technologies that are in use now or might be in the future. This Tech Quiz is …
Another Test for Lightning Protection
It doesn’t take an electrician or engineer to know that lightning is a major cause of electrical interference and damage. Protecting the electrical system against such a danger is paramount. A lightning stroke can be hotter than the surface of the sun, with voltage estimated as high as 120 million volts, including 400 kA and 500 megajoules of energy. Utility …
Electrical Service Work and Worker Fatigue: Take Care of Yourself!
Chances are you are in an electrical career you love: Testing, maintaining, installing, commissioning, designing, rebuilding, engineering, improving…and generally making electrical power systems safer and better. But are you doing so with a focus on managing the possible onset of acute or chronic fatigue? We live in a busy world — do more with less; be efficient in your tasks; …
NFPA 70E — 2021 Edition: Second Draft Meeting Highlights and Summary
The second draft technical committee meeting for the 2021 Edition of NFPA 70E was held July 15–19, 2019 in Indianapolis, Indiana. The public comments submitted for committee action following the first draft meeting were discussed and voted on. NETA was represented at the meeting and participated in the actions. To remind everyone of the NFPA process for changes to a …
NETA World Keeps You One Step Ahead of Emerging Technology
Emerging technologies continually alter the way electrical testing is performed in the field. New technology can vary from more efficient ways to perform long-standing test routines to introducing a new test technology and just about everything in between. This issue’s authors share their knowledge of recent developments in the field of electrical testing. Fall is typically one of the busiest …
Using Measurement Results to Diagnose the Condition of High-Voltage Rotating Machines —Part 2
Diagnosing the condition of complex systems such as high-voltage rotating machines has never been a simple task. Design requirements, the use of different materials, and demanding operating conditions require multiple off-line tests and on-line monitors to provide information on the machine’s condition. Part 1 of this article described the application of various off-line test techniques to assess stator and rotor …
Progress in Transformer Dissolved-Gas Analysis
Dissolved-gas analysis started out many years ago as a quick and simple test: Someone in the substation would briefly open a valve and sniff the transformer’s head-space gas. The pungent odor of a trace of acetylene would signify a potentially serious problem. By the late 1960s, it was possible to use a gas chromatograph as a much more sensitive nose …