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Restoring Power: The Mobile Solution

Power has weaved its way into nearly every intrinsic detail of our lives. It has become an afterthought during the course of the day and indeed, it is a staple in our way of life.In July of 2019, in the heart of the nation’s capital, a Potomac Electric Power Company (PEPCO) substation in...

Transmission Line Resiliency

Resiliency is a term used more and more by transmission line stakeholders including designers, operators, and owners. Resilience is simply defined as toughness or the capacity to recover quickly from difficulties. It can be used to describe a system, an object or even a person. Dr. Ginsburg, child...

Grounding Electrodes

For years, manufacturers of ground rods have strived to develop technical specifications for the electrical industry which address the specific needs and applications of clients and endusers alike. One reason for stressing the importance of this was to assure that the customer would receive what...

Cyber Resilience Begins With Network Vigilance

The idea of a cyberattack on the power grid may invoke images of flickering lights and a race against the clock to block an intrusion – but, often the most serious threats aren’t that obvious or dramatic.Cyber threats that target critical infrastructure facilities like the power grid...

Optimal Transformer Efficiency Using Weighted Average

In order to improve the efficiency of electrical distribution in commercial buildings, the US Department of Energy (DOE) introduced regulations with more stringent minimums on transformer efficiencies in January 2016. This was covered under the Code of Federal Regulations 10 CFR Part 431.192 and...
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Zensol new instrument for OLTC testing

According to CIGRE A2.34, the dynamic resistance measurement or DRM (OFFLINE) is a test that offers diagnostics for several diverter or selector switch malfunctions such as: contact problems, broken springs, broken transition resistors, poor contact pressure, inadequate transition time, momentary open circuit, and synchronism motion issues.

Zensol’s DRM principle

Tap windings are powered with a DC voltage source. The current fluctuations are recorded during the switching process. The schematic below shows the principle of the...

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