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
Continue readingI 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
Continue readingI 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
Continue readingTraditional line distance relay testing procedures (MTA, Reach, and Timing) are a great way to test electro-mechanical relays and learn how line impedance relays operate; but they are inefficient, ineffective,
Continue readingWe covered the basic operating principles of high impedance busbar differential protection in our previous post, I Want to Know How a High Impedance Differential Scheme Works. You should read that post
Continue readingWe received this question from the Ask Chris form at relaytraining.com. Follow this link to ask your own question and it might appear in a future blog post. High Impedance Differential Scheme Testing High
Continue readingThe last video in our end-to-end testing series gave you a general overview of distance protection, and why we use it in modern electrical systems. It is important to know how a regular distance protection
Continue readingIn the previous post about Directional Overcurrent relay (67) testing (Finding the Direction in Directional Overcurrent Relays), we reviewed Directional Overcurrent protection from a system perspective
Continue readingThe Relay Testing Handbook: End-to-End Testing covers the most common Communication-Assisted Protection Schemes including the Directional Comparison Blocking (DCB) Scheme. This bonus animation shows the
Continue readingThe Relay Testing Handbook: End-to-End Testing covers the most common Communication-Assisted Protection Schemes including the Permissive Under-Reaching Transfer Trip (PUTT) Scheme. This bonus animation
Continue readingThe Relay Testing Handbook: End-to-End Testing covers the most common Communication-Assisted Protection Schemes including the Directional Comparison Unblocking (DCUB) Scheme. This bonus animation shows
Continue readingThe Relay Testing Handbook: End-to-End Testing covers the most common Communication-Assisted Protection Schemes including the Permissive Over-Reaching Transfer Trip (POTT) Scheme. This bonus animation
Continue readingThe Relay Testing Handbook: End-to-End Testing covers the most common Communication-Assisted Protection Schemes including the Direct Under-Reaching Transfer Trip (DUTT) Scheme. This bonus animation shows
Continue readingDistance Protection (21) has many names (Line Protection, Line Distance Protection, Impedance Protection) and is one of the more complicated elements used in protective relaying. The Relay Testing Handbook
Continue readingEnd-to-End Testing can appear to be a daunting task. However, any relay tester can perform successful End-to-End Tests with a basic understanding of transmission line protection (or 21 impedance protection)
Continue readingSend this to a friend