Stephen Cialdea: Be a Lifelong Learner

NETA World StaffColumns, Insights & Inspiration, Summer 2024 Insights & Inspiration

Stephen Cialdea is the Chief Operating Officer for Sigma C Power Services LLC (SCPS), which is headquartered out of Westborough, Massachusetts, and has now expanded to several other areas. He oversees all SCPS operational staff on the field service and engineering sides of the business. “I’ve had the great opportunity to be part of the company’s beginnings and rapid growth …

Passion and Progress

Eric Beckman, IPS PowerServe, NETA PresidentColumns, President's Desk, Summer 2024 Columns

With my term as NETA’s Board President coming to a close, it seems fitting that the theme of the Summer 2024 issue of  NETA World is Transformers in that I have had the privilege of serving NETA during a transformative time in the Association’s history.   Thanks to the dedication of our Board of Directors, volunteers, members, and partners, NETA …

Ground-Grid Integrity Revisited

Jeffrey R. Jowett, MeggerColumns, Summer 2024 Columns, Tech Tips

Utility substations are undergirded by large — sometimes massive — grounding grids. These are made up of electrodes, much like the familiar ground rod, but with extended responsibilities. The grid must provide a means to carry electrical currents into the earth under normal and fault conditions without exceeding operating and equipment limits. The grid must also assure the safety of …

Transformers

Morgan Gieni, Magna IV EngineeringColumns, Tech Quiz

Transformers are critical power system components, allowing transmission and distribution of power throughout the industry. As NETA Certified Technicians, we should be familiar with the various sizes, configurations, and types of transformers.  1. Which type of transformer is usually connected to a utility generator?a. Step-down transformerb. Isolation transformerc. Step-up transformer d. Three winding transformer 2. What does the DY1 designation on …

Power Transformer Hazard Awareness

Paul Chamberlain, Asplundh Engineering Services, LLCColumns, Safety Corner, Summer 2024 Columns

Performing condition analysis or maintenance on a power transformer and ancillary devices is a potentially hazardous task that requires well-trained test personnel to identify and mitigate risks. Products and equipment that are designed to test and diagnose equipment while in operation, such as infrared cameras, partial-discharge detection equipment, and online oil analysis can be used to determine a power transformer’s …

Optimizing 50/27 Inadvertent Energization Protection

Steve Turner, Arizona Public Service CompanyColumns, Relay Column, Summer 2024 Columns

The 50/27 inadvertent energization protection function (Figure 1) is an overcurrent function supervised by generator terminal bus voltage derived from system-side voltage transformers (VTs). Inadvertent or accidental energizing of off-line generators has occurred frequently enough to warrant using dedicated protection logic to detect this condition. Operating errors, breaker flashovers, control circuit malfunctions, or a combination of these causes have resulted …

Medium-Voltage Cable Testing and the Importance of Processes

Mose Ramieh, CBS Field ServicesColumns, In the Field, Summer 2024 Columns

In a previous article, I discussed the challenges and the importance of proper cable installation. Here, we turn our attention to the challenges of obtaining accurate test results. These best practices and processes come with a field technician’s ability to be efficient and confident in their test results. I have been around the industry long enough to be present for …

How Proper Grounding Protects Substations and Workers

Jeffrey R. Jowett, MeggerColumns, Spring 2024 Columns, Tech Tips

Designing, installing, and maintaining an adequate grounding system is as important a part of substation design and maintenance as any other. “Out of sight, out of mind” definitely does not apply here. The grounding grid is not only essential to proper function and power quality but is also critically important to worker safety as well as that of public passersby. …

OOPS Protection Scheme Logic

Steve Turner, Arizona Public Service CompanyColumns, Relay Column, Spring 2024 Columns

An out-of-phase synchronization (OOPS) event results in a torque transient on the generator and prime mover. It exposes the generator, generator step-up (GSU) transformer, and system elements to a current transient that puts mechanical and thermal stresses on windings and other conductors.  These transients can be significant and result in through-current magnitude equivalent to a three-phase fault located at the …