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 before and here’s the synopsis for the paper: “Relay testers who want to test breaker failure (50BF) schemes should understand how 50BF schemes
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 testing steps for a specific element, or skip ahead to the “How
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? Did you know you can quickly and easily tell whether the phase rotation is correct
Here is the latest video describing the Permissive Under-Reaching Transfer Trip Communication-Assisted Trip Schemes used in modern distance protection. You can follow along with this animation via the Can You Predict What Happens in a Permissive Over-Reaching Transfer Trip (POTT) Scheme? post found under the Testing handbooks / Book Extras
In-service protective relay meter tests are THE MOST important tests that should be performed on every digital relay. All of your offline relay testing is meaningless if: The CT/PT ratios are incorrect. The relay isn’t connected to its input signals (CTs/PTs). The relay is looking in the wrong direction. The
Jeffrey Brown reached out to help announce his new book, Power Line Carriers – Simplified: A Field Engineer’s Perspective [pullquote align=”normal” cite=”Jeffrey Brown – www.plcexperts.net”]I would like to Introduce your First and Last Book on Power Line Carriers. Everything a Field Engineer needs to Know when it comes to protecting
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