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Sulfur hexafluoride

Sulfur hexafluoride (SF6)   What is SF6? It’s an inert, colorless, odorless and non-flammable gas.  Sulfur hexafuoride is about 5 times denser than air, meaning it’s heavier. If you were to fill a fish tank with SF6, you could treat the gas as if you were pouring water into a fish tank. It will collectively stay within the […]

General Electric 15kV MagnaBlast

The power company, or you, decide you need to de-energize a circuit. You rack out and remove your trusted 1960’s vintage breakers, of course you are suited up in the proper level PPE (Personal Protective Equipment). You then dust off your vintage ground and test device and install it in the cubicle. Connect the motor […]

The Importance of Acceptance Testing

Acceptance Testing   Before we can begin to talk about “Acceptance Testing”, you may or may not understand the phrase. Acceptance Testing pertains to all new electrical components. These are either purchased from a distributor, or even a manufacturer, but have never been put into “service”, i.e. energized. When a building is being remodeled, or […]

Load Tap Changer

Load Tap Changer Load Tap Changers (LTC’s) could also be known as a type of voltage regulator. In the Washington DC area, we typically see LTC’s at places of distribution. Your typical government building or privately owned buildings do not use LTC’s. You could even say that businesses that do not own the extra space […]

Medium Voltage Cable / 15kV Terminations

Medium Voltage Cables Electrical wire is an integral part of our lifestyle. Whether you care to notice or not, copper/aluminum conductors are everywhere. They provide power to every business and home that wishes to be connected. Most of the time, people who aren’t in the electrical trade, tend to see overhead power lines. Those consist […]

Transformer Vectors

Transformer Vectors   This was a topic brought up on the job and I figured I would address it in a very general post. This will not go too in depth but will help you understand how a vector is configured and possibly understand what you are dealing with on the job.   What is […]

Custom Voltage Test Box

Do you make your own test boxes?   Test boxes can be made for a variety of reasons. They are typically home made boxes that help to make manipulating voltage a little more usable for a specific task. They are usually not sold by a manufacturer because the market or target audience is extremely small. […]

Transformer Snubber Assembly

What is a Transformer Snubber?   It is a set of capacitors, surge arresters, fuses, and resistors typically found on medium voltage dry type transformers.   What are Snubbers designed for?   The main application has been to reduce damage to transformers during energizing applications. Energizing medium voltage transformers produces transient voltages. These transient voltages […]

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