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Managing power transformers in service: The most important economic aspects
Utilities are under intense pressure to maximize the use of their current transformer asset base in order to keep rates down while yet providing excellent reliability. In order to achieve... Read more...
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Practical lesson in grounding and bonding of Gas-Insulated Switchgear (GIS)
With the exception of SF6-to-air bushings terminals, all active portions of gas-insulated switchgear (GIS) are contained within grounded enclosures, which means that they are not susceptible to...
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Electrical thumb rules for switching, isolating and earthing
It is essential that the electrical engineers, or operators who will be in charge of switching, isolating, and earthing operations of the switchgear have a good understanding of the rules... Read more...
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Failures, Testing and Protections Associated with Field Winding of a Generator
Generator field winding is an integral part of the generator set which is responsible for generating the magnetic field that induces the stator emf when the rotor rotates. Regulation of... Read more...
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Bringing new life to an old Air-Insulated Substation (AIS)
An increasing number of substations globally are aging, while the construction of new ones is hindered by competitive limitations, rigorous environmental rules, and community acceptance issues....
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Maintenance Practices to be Followed for On-Site Generator Overhauling
This discussion will focus on the on-site overhauling of a gas-powered generator, detailing the essential procedures for its enhancement. It is a common practice for utilities to test electrical...
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The issue of a proper phase sequence (CW or CCW) on electric motors and...
Phase sequence or phase rotation is one of the most confusing concepts in the electrical engineering. It is often confused with motor rotation. For instance, one would say: “If it doesn’t turn the way...
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Execution of a Turnkey Substation Project: How not to step on the same rake...
Behind the successful execution of a turnkey substation project is always successful project management. Young engineers working on the execution of substation projects often repeat the same mistakes...
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Alarms Coming From the Shunt Reactor You Must Never Ignore (and what should...
Nowadays, monitoring of transformers and shunt reactors is pretty much common. However, the difference is in the nuances. There are dozens of parameters that can be monitored and the the overall cost...
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Four most important power transformer analyses
To be clear, nowadays, you can perform dozens of analyses on a transformer, and all of them are very important. However, it should not be that hard to separate a few of them, the most important ones....
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