Understanding Microprocessor Relay Logic – A Brief History of Relays

We have uploaded our first YouTube video, Understanding Microprocessor Relay Logic – A Brief History of Relays. (http://youtu.be/q_E_Gv_9_LQ) This video talks about the history of microprocessor

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Good Video for CT / PT / Phasor Diagram / Transformer Connections

Here is another excellent, but dated, video that covers a lot more than its title. It starts with an excellent introduction to CTs and PTs (http://youtu.be/T5U5M3RYx9Q) Then some Phasor Diagram basics

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2014 NETA Powertest Conference

I’ll be presenting “Simplified Motor Relay Testing” at the 2014 NETA Powertest conference in Denver. Here’s an excerpt from the NETA Powertest website Join us at PowerTest 2014

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A Good Resource for Electrical Theory Basics

All high voltage electrical testers should understand the basics of electrical theory. Unfortunately, Many people in the high voltage electrical testing industry fall into testing by accident and never

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Good Video Describing Electrical Fault Calculations

Understanding how to perform electrical fault calculations is not necessary if your primary goal is to simply test relays.  However, if you want to truly understand the electrical systems, how

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Understanding Transformer Vector Groups

Transformer vector groups can be a difficult concept to understand. I was lucky because the transformer ratio test-set I used for the first couple of years in my career allowed me to make three-phase connections,

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A Good Instrument Transformers Video

Instrument transformers are specially designed to transform high system voltages and currents into smaller voltages and currents for remote metering and protection. Instrument transformers can be

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Potential Transformer Testing (PT/VT)

I co-wrote an article for the NETA World magazine in 2004/2005 that covers several different manual techniques for potential transformer testing that explains several low-tech solutions for potential transformer

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The Relay Testing Handbook PDF Digital Version is Now Available

You can now purchase The Relay Testing Handbook pdf copies of any book in The Relay Testing Handbook series at our online store. The Relay Testing Handbooks are a series of books that have been written

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Current Transformer Testing (CT)

I wrote an article for the NETA World magazine in 2004 that covers several different manual techniques for Current Transformer Testing that should help even the most experienced technicians.  Here’s

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Distance or Impedance Protection (21) Video

Line distance (21) protection is primarily used to protect transmission lines or other electrical equipment where the equipment’s impedance characteristic can be calculated or modeled with software

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Good Directional Overcurrent Protection (67) Video

Instantaneous overcurrent (50) and time overcurrent (51) protection can protect equipment from overloads and short circuits, but there are situations where their ability to protect a system is limited.

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Testing Basler BE1-47N Negative Sequence Voltage Relays

Testing more complicated elements that use a percentage or ratio between values can be difficult if you cannot properly define all of the values in the equation.  It doesn’t help that different

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Good Videos to Help Understand Protective Relays

I’m reviewing information for the next book in The Relay Testing Handbook series and came across this Youtube channel. This is a dated, but excellent, video introduction to overcurrent protection (50/51)

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The Relay Testing Handbook: End to End Testing get’s its first review on Amazon…and it is a five star review:

This review appeared on The Relay Testing Handbook: End to End Testing book page: “I have been in electrical testing for the past 15 years and have worked for NETA shops and utilities. The booket

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