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Save Your Spot at the 33rd Annual Hands-On Relay School

The Hands-on Relay School in Pullman, WA is probably the best environment for relay training there is. I highly recommend that everyone attend. Sign up as soon as you can because they sell out quickly. Here’s

Instrument Transformers from 1924 Silent Sentinels

Silent Sentinels 1924 Excerpt #17 This excerpt from the 1924 version of Silent Sentinels discusses how engineers applied instrument transformers in the early days of the electrical system. What differences

Auxiliary Relays from 1924 Silent Sentinels

Silent Sentinels 1924 Excerpt #15 This excerpt from the 1924 version of Silent Sentinels discusses the most common auxiliary relays used in the early days of electrical systems. This is the 15th in the

Temperature Relays from 1924 Silent Sentinels

Silent Sentinels 1924 Excerpt #14 This excerpt from the 1924 version of Silent Sentinels discusses the most common temperature relays used in the early days of electrical systems. This is the 14th in

Direct-Current Relays from 1924 Silent Sentinels

Silent Sentinels 1924 Excerpt #13 This excerpt from the 1924 version of Silent Sentinels discusses the direct-current relays used in the early days of electrical systems. This is the 13th in the series.

Westinghouse Protective and Control Relays from 1924 Silent Sentinels

Silent Sentinels 1924 Excerpt #12 This excerpt from the 1924 version of Silent Sentinels lists the protective and control relays used in the early days of electrical systems. This is the 12th in the series.

Typical Relay Application from Silent Sentinels 1924

Silent Sentinels 1924 Excerpt #11 This excerpt from the 1924 version of Silent Sentinels discusses typical relay applications used in the early days of electrical systems. Are they much different than

Relay Settings from 1924 Silent Sentinels

Silent Sentinels 1924 Excerpt #10 This excerpt from the 1924 version of Silent Sentinels discusses protective relay settings in the electrical system. This is the 10th in the series. Follow these links

Get NETA CTDs for All of Our Online Courses

The InterNational Electrical Testing Association (NETA at http://www.netaworld.org/) just informed us that our latest online training course, Drawing Phasor Diagrams for Relay Testers, has been approved

The Relay Testing Handbook Updates

Our publishing model allows us to quickly correct errors or omissions and implement suggestions. Please contact us at [email protected] to report a problem. If we implement your suggestion, we’ll

What is DC Offset? Ask Chris

I was recently asked about DC Offset during a paper I presented at the 2015 Hands-On Relay School and struggled with an answer because I know what it looks like and I know it exists, but I’ve never heard

Automatic Control for Electrical Systems

Silent Sentinels 1924 Excerpt #9 This excerpt from the 1924 version of Silent Sentinels discusses automatic control in the electrical system. This is the 9th in the series. Follow these links to learn

Drawing Phasor Diagrams for Relay Testers

Waveform diagrams contain every detail of an electrical system, but that information can be difficult to understand without a lot of effort. Phasor drawings take the complex information embedded in waveform

We Need Your Help with Our Next Protective Relay Online Training Class: Electricity 101!

We’re wrapping up our upcoming protective relay online training class: Understanding and Drawing Phasor Diagrams, and we are ready to get started on the next course about the electrical fundamentals

Direct-Current Systems from Silent Sentinels 1924

Silent Sentinels 1924 Excerpt #8 This excerpt from the 1924 version of Silent Sentinels discusses direct-current systems. This is the 8th in the series. Follow these links to learn more about this series

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