Transmission & Distribution

Grounding Electrode

A grounding electrode is the physical connection between an electrical system and the earth. It stabilizes system voltage, supports fault-current dissipation, and forms the foundation of every compliant grounding system. Grounding Electrodes in Electrical Installations In every electrical system, there is a point where theory ends and physical reality begins. That point is the grounding electrode. Long before conductors are sized or bonding paths are verified within the broader framework of electrical grounding, the system must establish a relationship with the earth itself. The grounding electrode provides that relationship. It does not operate as a protective device, nor does…

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Latest T&D Content

Dissolved Gas Analysis Of Transformer Oil

Dissolved Gas Analysis evaluates gases dissolved in transformer insulating oil to identify internal electrical and thermal faults early, supporting predictive maintenance decisions that protect transformer reliability and reduce unplanned outages. Dissolved Gas Analysis (DGA) is one of the most trusted diagnostic tools for assessing the internal condition of a transformer. By measuring fault gases dissolved in insulating oil, DGA reveals developing problems inside windings, insulation, and core structures long before external symptoms appear. For utilities and industrial operators, DGA is not simply a laboratory test. It is a decision system that guides maintenance timing, risk prioritization, and asset life management…

Maintenance Inspection Windows on Transformers

Maintenance Inspection Windows on Transformers enable sight-glass checks of oil level, moisture ingress, and gasket integrity, supporting IR thermography, condition monitoring, and safe operation without outages or panel removal during service. The Importance of Maintenance Inspection Windows on Transformers in Electrical Safety Everyone knows that Thomas Alva Edison invented the lightbulb; but who invented the transformer - perhaps the most important electrical machine ever developed? The ZBD model alternating-current transformer was invented in 1885 at the Ganz Works in the Austro-Hungarian Empire by three Hungarian engineers: Karoly Zipernowsky, Otto Blathy and Miksa Deri (ZBD comes from the initials of…

Hydrogen Leak Detector Explained

A hydrogen leak detector identifies gas leaks in pipelines, transformers, substations, and fuel cells. It enhances safety, promotes clean energy, and ensures reliable monitoring across power generation, transmission, and distribution (T&D), as well as industrial applications. Hydrogen Leak Detector Explained: What You Need to Know Electrical Transformer Maintenance Training Substation Maintenance Training Request a Free Training Quotation A hydrogen leak detector is a crucial tool for identifying potentially hazardous leaks in environments where hydrogen is used, ensuring worker safety and protecting critical assets. In the T&D sector, hydrogen monitoring is crucial for transformers, gas-insulated substations (GIS), and compressor stations, as…

Grounding Transformers

Grounding transformers are commonly implemented as zig-zag or wye-delta configurations, depending on grounding method, system voltage, and protection coordination requirements. Grounding transformers provide a controlled neutral reference for ungrounded or delta-connected power systems. By creating a stable earth connection, they improve fault detection, voltage stability, harmonic control, and overall system reliability in utility, industrial, and renewable energy networks. They are most commonly installed in substations, wind farms, distributed generation sites, and industrial plants where a grounded neutral is required but not naturally available from the system configuration. In utility distribution systems, they are commonly installed alongside electrical substation transformers to…

Flywheel Energy Storage vs. Other Technologies

Flywheel energy storage systems store kinetic energy in rotating mass to deliver rapid response, improve grid stability, and support renewable integration with high efficiency, reliability, long cycle life, low environmental impact, and sustainable performance. Flywheel Energy Storage Fundamentals Flywheel energy storage is a promising technology for energy storage with several advantages over other energy storage technologies. Flywheels are efficient, have a longer lifespan, and can provide fast response times to changes in power demand. In addition, Flywheel systems have numerous applications, including grid stabilization, backup power, and UPS systems. While FES is still in the development and commercialization stage,…

Keeping the Lineman and His Work Site Safe

Linemen and His Work Safe outlines OSHA compliance, PPE, fall protection, energized-line procedures, lockout/tagout, arc-flash mitigation, and hazard assessments to protect utility crews working on high-voltage distribution, transmission, and substations. A Practical Guide to Linemen and Their Work Safety Line-construction contractors can do their best to train the management, offer safety training and equipment and trust the foremen who are appointed to a job, but it is an inherently dangerous business. Despite all the safeguards, some new linemen say this is what some foremen tell them about safety procedures: “That’s the way you may have learned it in training,…

Glass Electrical Insulators in T&D

Glass electrical insulators support and separate conductors in power lines, preventing unwanted current flow. Known for high dielectric strength and durability, they resist weathering and mechanical stress, ensuring reliable performance in transmission and distribution. Fundamentals of Glass Electrical Insulators Glass insulators are essential components in modern power systems, ensuring the safe and reliable flow of electricity from generating stations to consumers. Their role is not only to hold conductors but also to prevent leakage currents and flashovers. Understanding their properties, applications, and maintenance is crucial for utility professionals who design and operate reliable networks. To understand the role of glass…

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T&D Articles From ET Magazine

The Mentoring Gap: How the Loss of Informal Knowledge Is Affecting Safety

For much of the trade’s history, the most important safety lessons in line work were never written down. They were learned by proximity. New linemen watched how experienced hands approached a pole, handled a tool, or reacted when conditions changed. They learned when to slow down, when to stop talking, and when something simply did not feel right. These lessons were rarely formalized, yet they shaped judgment in ways no procedure ever could. That informal transfer of knowledge is fading, and its absence is beginning to show. The structure of the trade has changed rapidly. Accelerated retirements have removed decades…

Grounding Assumptions: Where Line Crews Still Get Hurt Despite “Doing It Right”

Why Grounding Remains a Source of Serious Injury Grounding is one of the most emphasized safety practices in line work, yet serious incidents continue to occur during grounded operations. These events rarely result from a lack of training or awareness. Instead, they stem from assumptions about how grounding behaves under real-world conditions that are more complex than any classroom scenario. The Difference Between Training Scenarios and Field Reality Training often presents grounding in controlled, idealized conditions. In the field, soil resistivity varies, access is limited, and system configurations change without warning. Temporary grounds are installed under time pressure, sometimes…

The Near-Miss Problem: Why Utilities Collect Data but Crews Do Not Trust It

The Promise of Learning Before Someone Gets Hurt Near-miss reporting is widely promoted as a cornerstone of modern safety management. In theory, it allows organizations to identify hazards, weak signals, and system failures before they result in injury or death. A near miss is a warning shot, an opportunity to learn without paying the highest price. Yet in many utilities, near-miss systems collect far less information than they could, not because incidents are rare, but because crews choose not to report them. Why Silence Feels Safer Than Speaking Up Linemen rarely avoid reporting near misses out of indifference. More often,…

Human Factors on the Line: Fatigue, Complacency, and Decision Making at Height

How Real Incidents Actually Take Shape Most serious line incidents do not begin with a dramatic failure or an obvious violation of rules. They begin quietly, through a sequence of small decisions made under ordinary pressure. A grip adjusted instead of reset. A stance accepted instead of corrected. A task continued rather than paused. None of these choices feel unsafe in the moment. In fact, they often feel efficient, reasonable, and consistent with experience. Yet when work is performed at height, these small decisions compound quickly, narrowing margins that cannot be recovered once something goes wrong. Understanding how those decisions…