Join the #1 Electrical Testing Network

TestGuy is a free online community dedicated to the fine art of power distribution testing, maintenance and troubleshooting. We offer resources to help field technicians gain the knowledge necessary to properly test, assess, and validate electrical equipment.

Check us out on social media

Trending Now
- Primary Injection...Minimum Breaker Size..As Per NETA
  
  Electrical Testing Talk 5
  
  Hey All. Regarding Primary Injection with respect to Insulated Case/Molded Case and L.V Power Breakers...I have not found a spec detailing if there is a...
  
  Last post by AaronCBI 1 Day Ago
- Primary Current Injection instantenous Pickup
  
  Electrical Testing Talk 9
  
  Hi guys, I need a help. In NETA ATS there is a sentence like "Determine instantaneous pickup by primary current injection." In my project some of the MCCB's...
  
  Last post by AaronCBI 1 Day Ago
- Doble M4000 Temp Sensor Help
  
  Electrical Testing Talk 7
  
  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 Kalbi_Rob 2 Days Ago
- Reactance of a synchronous machine
  
  NETA Level 3 Exam 4
  
  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 joeldjiogo 3 Days 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 4 Days 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 5 Days 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 5 Days 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 6 Days Ago
More topics: Electrical Testing Talk | Relay Testing Talk | Safety & Arc-Flash | NETA Exam Prep | NICET Certification Talk
Test Your Knowledge

Sharpen your skills with our collection of quizzes on electrical safety, maintenance & testing of electrical equipment and industry standards.
Tech Quiz Study Guide
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
- Electrical Safety Consideration While Performance Current Injection Test
  
  Safety and Arc Flash Talk 7
  
  Hello All, I'm interestion to know what exact safety concerns might happen in the scenario of primary and secondary injection testing respectively. ...
  
  Last post by AaronCBI 3 Weeks Ago
More topics: Electrical Testing Talk | Relay Testing Talk | Safety & Arc-Flash | NETA Exam Prep | NICET Certification Talk
Explore by Tag

acceptance testing cable and busway circuit breakers codes and standards doble electrical calculations electrical theory high voltage low voltage maintenance maintenance testing medium voltage neta neta certification neta exam neta exam questions neta exam tips neta level 2 neta level 3 neta level 4 neta study tips primary injection protection and control protective relays safety and arc-flash substations switchgear & mcc test equipment test procedures transformers

Electrical Testing Forum
1. Electrical Testing Talk
  ⁴¹
  
  Discuss apparatus testing, covering all equipment and voltage classes.
  Last post in
  Primary Injection...Minimum...
  
  by
  AaronCBI
  
  View Profile
  
  View Forum Posts
  
  Visit Homepage
  
  View Articles
  
  1 Day Ago
2. P&C / Relay Testing Talk
  ⁴
  
  Discuss protective relaying and control schemes.
  Last post in
  Relay Test Supplies
  
  by
  ShinAkuma
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  4 Weeks Ago
3. Safety and Arc Flash Talk
  ²
  
  Share electrical safety tips and talk about staying safe on the job site.
  Last post in
  Keep this in mind when...
  
  by
  akumaleon
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  2 Weeks Ago
Certification Forum
1. NETA Level 2 Exam
  ³¹
  
  Discuss the NETA Level II Assistant ETT exam.
  Last post in
  TTR transformer that is 80%...
  
  by
  Kalbi_Rob
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  6 Days Ago
2. NETA Level 3 Exam
  ³⁴
  
  Discuss the NETA Level III Certified ETT exam.
  Last post in
  Reactance of a synchronous...
  
  by
  joeldjiogo
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  3 Days Ago
3. NETA Level 4 Exam
  ⁸
  
  Discuss the NETA Level IV Senior ETT exam.
  Last post in
  Stepping of HV cable...
  
  by
  akumaleon
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  4 Days Ago
4. NICET Electrical Power Testing
  
  Discuss the NICET Electrical Power Testing certification (Level 1-4).
  Last post in
  I was at a NICET company and...
  
  by
  Gnollio
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  3 Weeks Ago
General Discussion Forum
1. Career Opportunities
  
  Get Hired! Browse premium job listings from electrical testing companies and vendors worldwide.
  Last post in
  Find a NETA or NICET Company
  
  by
  testguy
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  August 2, 2019
2. News and Announcements
  
  Look here for special announcements and other news from the testguy team.
  Last post in
  Join the TestGuy Live Chat on...
  
  by
  Kimbo Slice
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  November 18, 2020

What's Going On?

Currently Active Users

There are currently 422 users online. 5 members and 417 guests

Most users ever online was 3,267, November 1, 2019 at 02:37 AM.

TestGuy Statistics

Threads: 1,105
Posts: 4,665
Members: 17,735

Welcome to our newest member, JaysonSidw

Icon Legend

	Contains unread forum posts
	Contains no unread forum posts
	Forum is a category
	Forum is a Link

Follow Us

Hey All. Regarding Primary Injection with respect to Insulated Case/Molded Case and L.V Power Breakers...I have not found a spec detailing if there is a...

Hi guys, I need a help. In NETA ATS there is a sentence like "Determine instantaneous pickup by primary current injection." In my project some of the MCCB's...

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...

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

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

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%...

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 All, I'm interestion to know what exact safety concerns might happen in the scenario of primary and secondary injection testing respectively. ...

What's Going On?

Currently Active Users

TestGuy Statistics

Icon Legend

Follow us

Explore TestGuy

NETA Certification Training

NICET Electrical Power Testing

Help and Support