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- Doble M4000 Temp Sensor Help
  
  Electrical Testing Talk 6
  
  Looking to repair our M4000 temp/humidity sensor cable, can anyone help with the pinouts? Connector pins are labeled 1-4, need to know which color goes to...
  
  Last post by rofo42 10 Hours Ago
- Stepping of HV cable insulation
  
  NETA Level 4 Exam 2
  
  Which insulation requires stepping I answered EPR I believe the other choices were XLPE or oil insulated any thought?
  
  Last post by akumaleon 16 Hours Ago
- Reactance of a synchronous machine
  
  NETA Level 3 Exam 3
  
  The reactance of a synchronous machine depends upon: a. Applied voltage b. Leakage flux c. Degree of saturation of magnetic core e. Power...
  
  Last post by akumaleon 16 Hours Ago
- Relay types that requires the least energy
  
  NETA Level 3 Exam 0
  
  What type Relays that requires the least energy to operate: a.Induction-disk relay b.Polarized dc relay c.Moving-coil dc relay ? d.Induction-cylinder...
  
  Last post by akumaleon 1 Day Ago
- Megger testing technique questions
  
  Electrical Testing Talk 8
  
  When performing insulation resistance on equipment, does it matter which lead on a megger goes where? If I’m testing insulation resistance from A to B, does it...
  
  Last post by suchagrrl 1 Day Ago
- TTR transformer that is 80% loaded
  
  NETA Level 2 Exam 2
  
  What is the turns ratio of a 3-phase 500kVA, 13,200-480 volt rated delta-delta transformer that is 80% loaded I answered this question incorporating the 80%...
  
  Last post by Kalbi_Rob 2 Days Ago
- Transmission Line Fault Question
  
  NETA Level 4 Exam 2
  
  Hey guys- just putting this out there- has anyone seen a question like this on the new test? Two 138 KV lines are separated by a separate line source...
  
  Last post by Jtmc78 3 Days Ago
- Keep this in mind when working around energized equipment
  
  Safety and Arc Flash Talk 1
  
  Keep the following in mind when working on exposed, energized electrical conductors or circuit parts: 3 Rules-of thumb for arc flash 1.) Incident energy...
  
  Last post by akumaleon 1 Week Ago
More topics: Electrical Testing Talk | Relay Testing Talk | Safety & Arc-Flash | NETA Exam Prep | NICET Certification Talk
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Technical Articles
- Power Factor Testing: Voltage Considerations Explained
  
  The first step in any comprehensive testing approach is to create a plan that ensures the safety of both the equipment under test and personnel performing the test. Keeping the device under test safe... Continue Reading
  
  Posted By testguy 2 Weeks Ago
- Motor Nameplate and Ratings Explained
  
  We explain the markings found in NEC along with other common terms and ratings included on motor nameplates. Continue Reading
  
  Posted By testguy August 30, 2020
- Electrical Drawings and Schematics Overview
  
  Designing, installing, and troubleshooting of electrical systems requires the use of various drawings to give engineers, installers, and technicians a visual representation of the systems they work... Continue Reading
  
  Posted By testguy July 19, 2020
- Insulating Liquids: Basic Properties, Types and Applications Explained
  
  Fluid inside electrical apparatus is the lifeblood that serves both as a dielectric and a cooling medium. Continue Reading
  
  Posted By testguy June 25, 2020
- 4 Critical Tests for Evaluating HV Circuit Breaker Performance
  
  Regardless of the breaker type, its important to test their components regularly to help ensure proper operation in case of a system fault or switching operation. Continue Reading
  
  Posted By testguy March 9, 2020
- Power Quality Analysis: Basic Theory and Applications Explained
  
  There is no such thing as perfect power quality in the real world. Service interruptions, equipment malfunction, and excess power consumption are all common symptoms of poor power quality. Continue Reading
  
  Posted By testguy November 23, 2019
- 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
  
  Posted By testguy September 15, 2019
- 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
More Technical Articles...
Popular on TestGuy
- Number of cycles completed in one second
  
  NETA Level 2 Exam 14
  
  2. The number of cycles completed in one second is called the Your Answer: hertz marked incorrect Hertz — A unit of measure for frequency. Replacing the...
  
  Last post by RabbleRabble November 29, 2020
- NETA Governance
  
  Electrical Testing Talk 11
  
  I think NETA is influenced by some specific testing companies. Also they govern NETA test. Who will agree with this?
  
  Last post by southbury September 5, 2020
- NETA III Test Feb 2020
  
  NETA Level 3 Exam 10
  
  I would say about 25% of the questions on the exam were on this forum.
  
  Last post by clipboardwarrior March 19, 2020
- Doble Testing a Bushing: C2 reading higher than nameplate
  
  Electrical Testing Talk 8
  
  Does anyone have an explanation for high C2 readings when Doble testing transformer bushings? The test was on a three winding transformer. All C2 values...
  
  Last post by amlawren April 2, 2020
- Surge arrester testing(34.5kv, 161kv, 330kv)
  
  Electrical Testing Talk 8
  
  What's the appropriate test can I perform on my surge arrester(Lighting arrester) both polymer and porcelain type. Assist me with drawings/sketches of the test...
  
  Last post by backpack96 October 3, 2020
- Omicron Test Equipment vs Others
  
  Electrical Testing Talk 8
  
  I've recently went and visited an Omicron facility in Houston. We went for the line impedance testing abilities, but while we were there I was able to ask...
  
  Last post by amlawren April 3, 2020
- Contact Resistance testing of BUS, difference between test currents 10A VS 100A
  
  Electrical Testing Talk 8
  
  Just wondering on some theory info about long bus runs on contact resistance testing prior to putting equipment into service. Testing it at 10A VS 100A, does...
  
  Last post by Kalbi_Rob August 16, 2020
- Testing Guide for new Engineers
  
  Electrical Testing Talk 7
  
  Hello guys, I hope you all are doing well. I want to learn Designing, Testing and Relay testing. I have 7 years of experience in substation projects but I...
  
  Last post by Bob_Woodward August 10, 2020
More topics: Electrical Testing Talk | Relay Testing Talk | Safety & Arc-Flash | NETA Exam Prep | NICET Certification Talk
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Looking to repair our M4000 temp/humidity sensor cable, can anyone help with the pinouts? Connector pins are labeled 1-4, need to know which color goes to...

Which insulation requires stepping I answered EPR I believe the other choices were XLPE or oil insulated any thought?

The reactance of a synchronous machine depends upon: a. Applied voltage b. Leakage flux c. Degree of saturation of magnetic core e. Power...

What type Relays that requires the least energy to operate: a.Induction-disk relay b.Polarized dc relay c.Moving-coil dc relay ? d.Induction-cylinder...

When performing insulation resistance on equipment, does it matter which lead on a megger goes where? If I’m testing insulation resistance from A to B, does it...

What is the turns ratio of a 3-phase 500kVA, 13,200-480 volt rated delta-delta transformer that is 80% loaded I answered this question incorporating the 80%...

Hey guys- just putting this out there- has anyone seen a question like this on the new test? Two 138 KV lines are separated by a separate line source...

Keep the following in mind when working on exposed, energized electrical conductors or circuit parts: 3 Rules-of thumb for arc flash 1.) Incident energy...

2. The number of cycles completed in one second is called the Your Answer: hertz marked incorrect Hertz — A unit of measure for frequency. Replacing the...

I think NETA is influenced by some specific testing companies. Also they govern NETA test. Who will agree with this?

I would say about 25% of the questions on the exam were on this forum.

Does anyone have an explanation for high C2 readings when Doble testing transformer bushings? The test was on a three winding transformer. All C2 values...

What's the appropriate test can I perform on my surge arrester(Lighting arrester) both polymer and porcelain type. Assist me with drawings/sketches of the test...

I've recently went and visited an Omicron facility in Houston. We went for the line impedance testing abilities, but while we were there I was able to ask...

Just wondering on some theory info about long bus runs on contact resistance testing prior to putting equipment into service. Testing it at 10A VS 100A, does...

Hello guys, I hope you all are doing well. I want to learn Designing, Testing and Relay testing. I have 7 years of experience in substation projects but I...

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