Breakers & Relays

Protective Relay Frustrations

Solving misoperation with line parameter measurements BY WILL KNAPEK, OMICRON USA Between 80 to 90 percent of all power system faults involve ground. Many protective…
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Latest Electrical Industry News

Extend the Life of Your Circuit Breakers

What to ask to ensure proper circuit breaker testing and maintenance BY ROBERT FOSTER, Megger Protecting a utility’s assets is essential. There are many different…
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Protection of Electrical Power Transformers

INTRODUCTIONIn most large electrical systems, generators and power transformers are the two most expensive pieces of equipment. In addition to the capital cost of purchase,…
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Technician working on DILO SF6 gas separator

Reconditioned SF₆ Gas: An Environmentally Friendly Alternative

When it comes to medium and high voltage circuit breakers, there is no better electrical insulator than sulfur hexafluoride (SF6). The manufactured gas is most…
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switching times on medium and high voltage Gas Insulated Switchgear

Effective and Safe Testing of GIS Switchgear

To fully assess the functionality of medium and high voltage circuit breakers, various mechanical and electrical parameters must be tested. Gas-insulated switchgear (GIS) in particular…
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magazine_sep_oct_2023_article_2

FERC Approves Interconnection for Talen Energy, Amazon Data Center

In a significant move that underscores the growing demand for reliable and sustainable energy to power the expanding digital infrastructure, the Federal Energy Regulatory Commission…
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Circuit Breaker Lubrication

Developing circuit breaker lubrication procedures BY RICK YOUNGBLOOD, Doble Engineering Company Circuit breaker analyzers are used to determine operating speeds and velocity. This information enables…
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Vacuum Interrupter Testing for Circuit Breakers

How to predict field life using vacuum interrupters BY FINLEY LEDBETTER, Group CBS Utilities have widely replaced older air-magnetic and oil interrupters for circuit breakers…
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Breakers & Relays Articles

A Closer Look into the True Cost of Replacing Electrical Switchgear

A Closer Look into the True Cost of Replacing Electrical Switchgear

During my switchgear modernization presentations all over the US, I am constantly reminded of the…
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Utilizing Fault Resistance to Test Distance Relays

Utilizing Fault Resistance to Test Distance Relays

Taking power grid protection to an all-new level BY JASON BUNEO & RENE AGUILAR, Megger…
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Dynamic Resistance Measurement

Dynamic Resistance Measurement

Condition testing of circuit breaker’s arcing contacts BY BUDO MILOVIC, DV-Power The preventive maintenance on…
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Partial Discharge & Circuit Breaker Asset Management

Partial Discharge & Circuit Breaker Asset Management

Detecting and avoiding preventable failures BY JAY GARNETT, Doble Engineering Company While metal clad switchgear…
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