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- GE SR745 Protective Relay
  
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Technical Articles
- Magnetron Atmospheric Condition (MAC) Testing Principles
  
  Unlike the hipot test, testing vacuum interrupters utilizing magnetron atmospheric condition (MAC) principles can provide a viable means for determining the condition of vacuum interrupters prior to... Continue Reading
  
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- Electrical Power System Studies Explained
  
  There are many different types of power system study, each with their own special purpose and calculation method. Each analysis is unique to a particular power system, any changes within the system... Continue Reading
  
  Posted By testguy August 9, 2019
- Power Distribution Unit (PDU) Applications, Testing & Maintenance
  
  Traditional data center power distribution designs consist of multiple PDUs delivering power to remote power panels (RPPs) throughout the building, which in turn deliver power to network hardware... Continue Reading
  
  Posted By testguy May 26, 2019
- Network Protector Basics: Applications, Operation, and Testing
  
  This guide covers network protector basic operation and maintenance procedures. Continue Reading
  
  Posted By testguy April 19, 2019
- Infrared Thermography for Electrical Distribution Systems
  
  This guide provides a basic overview of the theory and procedures involved with infrared scanning electrical distribution systems. Continue Reading
  
  Posted By testguy December 22, 2018
- Protective Relay Testing and Maintenance Overview
  
  A comprehensive overview of inspection and test procedures for protective relays in electrical power systems. Continue Reading
  
  Posted By testguy November 22, 2018
- Surge Arresters: Selection, Application and Testing Overview
  
  A comprehensive guide to surge arrester selection, application, maintenance and testing. Continue Reading
  
  Posted By testguy November 9, 2018
- Ground Fault Protection Systems: Performance Testing Basics
  
  This guide provides a general overview of inspection and test procedures for simple residual and zero-sequence ground fault protection systems. Continue Reading
  
  Posted By testguy June 6, 2018
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More topics: Electrical Testing Talk | Relay Testing Talk | Safety & Arc-Flash | NETA Exam Prep | NICET Certification Talk
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Hey all, So I've been placed in the Relay team at work and have been at it for nearly 2 months. The most notable work experience so far has been terminating...

I'm signed up to take my NETA 2 exam in November. Any words of wisdom? Type of questions to study for? Thanks in advance

I have limited to no experience working with IEDs except what I learned in school. What are some things that they monitor?

What is the purpose of the Guard terminal on a Megohmeter?

I was wondering if anyone had any type of spreadsheet or formula on how to calculate the currents needed to operate different parts of a differential slope. I...

Interested in giving our new Android app a try? We are opening up a limited number of spots in our internal testing program to TestGuy Pro members! All you...

does anyone have any tips on buying FR clothing as a smaller person? I'm 5'5" with 29" waist. The Ariat Bootcut seemed like it would work the best but the legs...

We are pleased to announce the upcoming release of a new app for Android designed specifically for test technicians in the field. The TestGuy Android app...

I have been given access to start a study group on Discord for test prep. I am thinking once or twice a week we meet and discuss topics and learn together as...

Would anyone like to participate in a online study group? I have tried passing this exam three times now and each time I am a little closer but still not...

What effect, if any, does negative tank pressure have on transformer power factor? I've never known of it being an issue but another tech on site seems to...

This question appeared on the NETA III exam. Find the total reactance in this circuit. I distinctly remember it because it was the very first question to...

In the NETA ATS and MTS power factor testing for a medium voltage vac breaker is an optional test. I don't believe it is a recognized test by manufacturers....

Hi guys, I need some help. I am testing a Dry Type 1500 kVA tranformer. Insulation tests are okay but in Ratio test my device giving an "High Execuation...

Does anyone have experience doing a Ground Fault verification through a neutral CT on a 5,000A Magnum SB main Breaker with a Digitrip 520 trip unit?

As part of our ongoing effort to make this community the best it can possibly be for our members, we are pleased to kick off a new community posting...

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