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Introduction to Protective Relays Lesson is complete

The first lesson of the upcoming How to Test Basic Overcurrent Relays Online Seminar has been recorded, edited, and added to our upcoming How to Test Basic Overcurrent Relays (Introduction to Protective

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Online Seminars Update

We’re working hard on the next online seminar and had to make some changes to the plan after we realized how much content would be included in our original overcurrent relay testing plan and that

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Overcurrent Relay Testing Online Seminar Update

The first lesson for our upcoming Online Seminar about Overcurrent Relay Testing is in the can and ready for final editing. Here are the topics we cover in the first lesson: History of Electrical

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The Complete Guide to the Square Root of Three in Power Calculations

Zach Stone, P.E. contacted me after I (Chris Werstiuk writing right now) posted my recent “Understanding the Great Leading vs. Lagging Power Debate” post because I had incorrectly defined

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New Online Seminar for Overcurrent Testing is Now in Production

We should have started this several months ago, but we’re on task now and the amount of content has already doubled since we first envisioned what this seminar would look like. It looks like we’ll

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Testing Loss-of-Field / Loss-of-Excitation Elements (40)

“Why did my 40-Element test fail?” is probably the most common question I get asked about generator protection. The first question I ask is, “What kind of fault are you trying to

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Understanding the Great Leading vs. Lagging Power Debate

I once watched two engineers/technicians argue for two hours about what power definitions should be displayed on a HMI interface. One of them argued that VARs were being EXPORTED during lagging conditions,

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How to Test Breaker Failure Element Logic

I presented a “Testing Breaker Failure Schemes” paper at the 36th annual Hands-On Relay School in 2019. This post is the second part of the paper that will give step-by-step test plans to

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How to Test Breaker Failure Schemes

I presented a “Testing Breaker Failure Schemes” paper at the 36th annual Hands-On Relay School in 2019. This post is the second part of the paper that will give step-by-step test plans to

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Introduction to Breaker Failure Schemes (50BF)

I presented a “Testing Breaker Failure Schemes” paper at the 36th annual Hands-On Relay School in 2019. Here’s the first part of the paper that will give you a basic introduction to

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The Over-Excitation Testing (24) Chapter is Complete. What Should be in the Synchronizing Chapter (25)?

The first draft of the Over-Excitation (24-Element) Chapter is finally complete and off to the editors. We cover the theory and step-by-step testing procedures over 60 pages! You can see all the topics

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36th Annual Hands-On Relay School

I’ll be presenting the “Testing breaker Failure Schemes” open lecture at the 36th Annual Hands-On Relay School this year. I haven’t written anything about Breaker Failure protection

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2019 Hands-On Relay School

The Hands-On Relay School in Pullman, WA is one of the best relay training opportunities there is. It will be held at Washington State University between March 10-15, 2019. Registration opens on November

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How to Test Protective Relays Correctly

Usually I try to keep my posts as simple and practical as possible.  This post is a little different because I will discuss how I approach all relay testing. Skip this one if you are looking for relay

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Use Sequence Components To Make Sure Your Relay Isn’t Disabled By Incorrect Phase Rotation

Did you know that a relay connected to, or set with, the incorrect phase rotation can disable its higher level functions? Did you know that the wrong phase rotation can make your relay testing worthless?

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