Valence Electrical Training Services
Shares

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

Continue reading

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

Continue reading

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

Continue reading

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

Continue reading

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

Continue reading

What is the Best Protective Relay Test-Set?

Declaring the best protective relay test-set is a lot like declaring the best pickup truck. Any model of truck will get you from point A to point B in the city, but there are pros and cons for each one. 

Continue reading

Ask Chris: What is the best path for high voltage electrical employment as a relay technician?

Here is a question submitted to the Ask Chris section of the RelayTraining.com website about the best path for electrical employment. I have just recently completed an IBEW apprenticeship and tested out

Continue reading

What Electromechanical Relay Kicked Your Ass?

I’m writing a blog post to help people buy a protective relay test-set that’s right for their application. What electromechanical relays require the most VA, or compliance voltage, to test? I

Continue reading

Some First-Generation Protective Relays from Silent Sentinels 1924

Silent Sentinels 1924 Excerpt #7 This excerpt from the 1924 version of Silent Sentinels lists some of the protective relays available in 1924. This is the 7th in the series. Follow these links to learn

Continue reading

Valence will be at the 32nd Annual Hands-On Relay School in Pullman, WA

Hands-On Relay School is one of the best relay training opportunities in the industry. It starts on Monday, March 16, 2015 with several 45-minute open concurrent lectures that allow you to choose topics

Continue reading

Calculation of Short-Circuit Current from Silent Sentinels 1924

Silent Sentinels 1924 Excerpt #6 This excerpt from the 1924 version of Silent Sentinels discusses how electrical engineers calculated short-circuit currents operated in 1924. This is the 6th in the

Continue reading

Valence will be at the NETA PowerTest 2015 Conference in Nashville, TN

The NETA PowerTest Conference is one of the best conferences in the industry. It starts on Monday, March 2nd with a series of 45 minute lectures from industry experts. There are several tracks, or themes,

Continue reading

Please Explain the Principle of Weak InFeed Echo Permissive Over Reach Transfer Trip Schemes?

Rahim submitted this question to the Ask Chris section of the RelayTraining.com website. Most line distance protection schemes assume that the system will always be able to supply enough amps to make the

Continue reading

Methods of Clearing Ground Faults from Silent Sentinels 1924

Silent Sentinels 1924 Excerpt #5 This excerpt from the 1924 version of Silent Sentinels discusses how electrical engineers understood how alternating-current systems (AC) operated in 1924. This is the

Continue reading

When I test induction disc relay type … Is the pickup value the value at which the disc starts rotating?

This question was submitted via the Ask Chris form where you can ask me relay testing questions that I can hopefully answer. Creating test plans for digital relays is often difficult because you can have

Continue reading

Send this to a friend