Breakers & Relays

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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Latest Electrical Industry News

Selecting Substation Medium-Voltage Switchgear: GIS vs. AIS

Understanding differences between GIS and AIS in five points BY GAETAN DJENANE, Schneider Electric, Inc. Many considerations must be taken into account before selecting the…
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non-flammable aerosol fluid

SAME DAY SWITCHING

Same day switching avoids the extended outages and human and equipment costs associated with inoperable and broken switches.The vast majority of air break disconnect and…
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digital protective relays

Global study finds continuing moderate growth in protective relay market with commitment to improving protection coordination and grid security practices

In 2016, Newton-Evans Research Company completed a six-month research study and survey of protective relay usage patterns in the world community of electric power utilities.…
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Circuit Breaker Time and Motion Testing

Determining mechanical condition of high-voltage circuit breakers BY JOZEF LEVI, Doble Engineering Company Life expectancy of a newly installed high-voltage circuit breaker is approximately 40…
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Gas-insulated Switchgear Options for Substations

Switching gears in the underground BY PETR RUDENKO AND PETER GLAUBITZ, Siemens As demand for energy continues to rise, an increased number of locations around…
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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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Partial Discharge & Circuit Breaker Asset Management

Detecting and avoiding preventable failures BY JAY GARNETT, Doble Engineering Company While metal clad switchgear can be very reliable, sometimes operating for over 50 years,…
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Breakers & Relays Articles

Effective and Safe Testing of GIS Switchgear

Effective and Safe Testing of GIS Switchgear

To fully assess the functionality of medium and high voltage circuit breakers, various mechanical and…
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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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FERC Approves Interconnection for Talen Energy, Amazon Data Center

FERC Approves Interconnection for Talen Energy, Amazon Data Center

In a significant move that underscores the growing demand for reliable and sustainable energy to…
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Storm-Hardened Switchgear

Storm-Hardened Switchgear

How to protect electrical equipment from Mother Nature BY ROBERT A. MURPHY, Trayer Engineering Corporation…
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Smart Substations and Their Role in the Evolving Smart Grid

Smart Substations and Their Role in the Evolving Smart Grid

A Smart substation digitizes protection and control, enabling utilities to detect faults faster, manage DER…
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