Microgrids in Practice

Mayfield Renewables Industry Topics, Winter 2022 Industry Topics

The majority of the U.S. electric grid was built in the early 20th century. It was initially designed for the one-way transfer of electricity from large fossil-fuel power plants directly to consumers. The grid of that era delivered power from rural areas, where power was generated, to cities, where much of it was consumed.  Much has changed in the energy …

Photovoltaic Power Systems and Ground-Fault Protection on the Service Entrance Disconnect

John Wiles, Retired Winter 2022 Industry Topics, Industry Topics

There are no one-size-fits-all solutions to the ground fault-protected main circuit breaker issue. Diligent attention to the requirements in the NEC — NFPA 70 and the equipment in the existing installation is required. The 2020 National Electrical Code (NEC – NFPA 70) in Section 230.95 Ground-Fault Protection of Equipment requires ground-fault protection of equipment for solidly grounded wye services of …

Using the Three Rs to Reduce the Environmental Impact of SF6 Gas

Lina Encinias and Corey Ratza, DILO Company, Inc. Industry Topics, Winter 2022 Industry Topics

The ability of SF₆ to recombine after arcing events — combined with the fact that it is chemically inert, non-toxic in its pure state, non-flammable, and very-high density — makes it an excellent di-electric gas, and sulfur hexafluoride has been used as an insulating medium in the electrical industry since the 1950s. SF6 GAS ENVIRONMENTAL IMPACT SF₆ is a man-made …

Asset Management — Maximizing ROI

Cody Richards, Protec Equipment Resources Fall 2022 Industry Topics, Industry Topics

Our customers in the NETA community reach out to us with two problems: people and assets. There are just not enough people and technicians to fill the demand in our industry. We consistently work on the people problem with our customers, but the other problem — assets — tends to get put on the back burner.  Assets and inventory are …

Assessing Transformer Condition

Simon Sutton, Lance Lewand, and Andy Davies, Doble Engineering Company Fall 2022 Industry Topics, Industry Topics

Transformers are subjected to electrical, thermal, and chemical stresses during their operational life that degrade the insulating oil and solid insulation, cause corrosion and oxidation, and create the conditions for incipient faults to develop, which may ultimately shorten the life of the asset. These ageing processes are necessarily considered during the transformer design phase. However, degradation that occurs faster than …

76 CSA Z463: 2021 — Year 2

Terry Becker, TW Becker Electrical Safety Consulting Inc. Fall 2022 Industry Topics, Industry Topics

This is year two for the fifth edition of the CSA Z462, Workplace electrical safety Standard. Are you aware of the changes and updates that could impact your electrical safety program? Have you provided arc flash and shock training to your qualified persons on the new edition? Do you still have questions that need clarification?  We marked the first anniversary …

OSHA’s New Heat Illness NEP Targets Electrical Contractors

Phillip B. Russell, Ogletree Deakins Nash Smook & Stewart PC Fall 2022 Industry Topics, Industry Topics

The United States Occupational Safety and Health Administration (OSHA) has launched a new national emphasis program (NEP) to help prevent heat-related illnesses at outdoor and indoor workplaces, including electrical contractors and other wiring installation contractors (2017 NAICS Code 2382).  The program, CPL 03-00-024 Outdoor and Indoor Heat-Related Hazards, was announced by Labor Secretary Marty Walsh with Vice President Kamala Harris …

Acceptance Testing Collaboration Leads to Improved Project Delivery

Eric Nation, High Voltage Maintenance Corporation Industry Topics, Summer 2022 Industry Topics

Nearly 70 percent of early equipment failures can be traced to design, installation, or startup deficiencies. That’s why it is so important to protect a data center’s investment in new equipment or systems with acceptance testing. A thorough check of electrical power systems and components before energization can uncover and help correct problems that otherwise would lead to project schedule …

Power Factor: Understanding the Difference Between DPF and TPF

Ken Kious, PowerSight Industry Topics, Summer 2022 Industry Topics

People often refer to power factor without understanding that there are two types of power factor measurement, and it is important to understand the difference between them. If you have a power factor problem, it could mean you have: A power factor correction problem that requires adding (or taking away) capacitors A combination of a power factor correction problem and …

Medium-Voltage Circuit Breaker Condition Assessment

Siegfried Bernhauswer and Ari Tirroniemi, OMICRON electronics Industry Topics, Summer 2022 Industry Topics

Circuit breakers are indispensable in any electrical power system. They are the only piece of equipment that can switch not only under normal load, but also under fault conditions. They must be able to reliably disconnect a faulty section from the grid as quickly as possible. Circuit breakers must be able to meet this requirement even after they have been …