Transformer Turns Ratio (TTR) testing is a fundamental diagnostic method used to verify transformer winding integrity, tap-changer position, and compliance with nameplate data by comparing measured voltage ratios with theoretical values. This test enables early detection of winding deformation, incorrect internal connections, manufacturing defects, or tap-changer issues. However, when applied to rectifier transformers, complexity increases significantly due to multiple secondary …
PART 2: FROM CLASSROOM TO CAREER AND BEYOND Part 1 in the Spring issue of NETA World provided a retrospective on the implementation of the NETA Electrical Power Testing Technician (EPTT) curriculum at Long Beach City College (LBCC). That story is important, but it is only half of it. The real measure of success is what happens after students leave …
The decision to replace a medium-voltage cable is rarely straightforward. It involves high costs, plant downtime, mobilization of field crews, and a direct impact on the reliability of the electrical system. For many years, the dominant practice has been to adopt simplified criteria, generally based solely on cable age: Once a certain number of years has passed, replacement is planned. …
Electrical equipment forms the backbone of modern industrial and utility operations, including power generation, transmission and distribution networks, renewable energy facilities, manufacturing plants, and hyperscale data centers. As global demand for reliable and uninterrupted power continues to rise, capital budget constraints and extended lead times for critical components are forcing organizations to place greater emphasis on maximizing the operational life of existing assets.
Since its inception, the partnership between Long Beach City College (LBCC), Tony Demaria Electric, Inc. (TDE), and NETA has created a rare and impactful educational model for training high-voltage test technicians. Now entering its eighth academic year, the program continues to stand as a national example of how local institutions, accredited industry partners, and professional associations, as well as the individuals’ enthusiasm, dedication, and volunteering, can collaborate to address skilled labor shortages through a curriculum aligned with ANSI/NETA MTS, Standard for Maintenance Testing Specifications for Electrical Power Equipment and Systems.
Infrared thermography has long been a cornerstone of electrical panel maintenance, traditionally performed through periodic, time-based inspections using handheld infrared cameras. This method has been widely adopted as a best practice due to its ability to detect early signs of failure, mitigate catastrophic risks, and support the longevity of electrical infrastructure. However, recent regulatory changes have elevated the role of …
This article discusses best practices for managing inspection data in electrical utilities, emphasizing the importance of standardized collection, metadata tagging, and compliance with IEEE 1808-2024. It highlights the value of integrating data from multiple sensors, including RGB, thermal, and ultraviolet imaging, with geographic and asset information, and applying structured, industry-based diagnostics. These practices support traceable condition assessments, consistent severity scoring, …
Low-voltage protection is undergoing rapid evolution. For decades, microprocessor-based protective relays have been the gold standard for medium- and high-voltage power systems, offering highly configurable protection, metering, and communication capabilities. Meanwhile, circuit breaker trip unit technology remained relatively static for many years, remaining confined to the breaker frame and focused primarily on basic overcurrent functions. This is no longer the …
Correction: In the Industry Topic article “Life After 40: A Critical Look at Electrical Safety’s Most Contentious Number,” by Matthew J. Robinson, published in the Fall 2025 issue of NETA World, Sigma C Power Services LLC was twice incorrectly referred to as Sigma C. The article byline should read: By Matthew J. Robinson, Sigma C Power Services, LLC. The opening sentence in …
The reliability of medium-voltage underground systems is a foundational element for the continuous performance of wind farms, particularly in regions with challenging environmental conditions. In a global context of increasing integration of renewable energy sources into the electrical matrix, failures in buried insulated cables not only affect system availability but also jeopardize operational and economic safety. The investigation described in …