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- Dry type XMFR - 7.5kV rated cable in a 25kV system?
  
  Electrical Testing Talk 0
  
  Hello all, I recently was testing a 750kVA dry type distribution transformer for regular maintenance. The transformer system voltages are 25kV - 600/347V....
  
  Last post by ekemp2 10 Hours Ago
- NETA II CT Question
  
  NETA Level 2 Exam 1
  
  On a window CT with primary power going through H1-H2, What terminal what the secondary voltage exit from? A) Line Side B) Load Side C) X1 D) X2 This...
  
  Last post by GrayTard 20 Hours Ago
- Transformer Differential Operands in Formula
  
  NETA Level 4 Exam 0
  
  Can you tell me what each of the operands represent in the solution formula for transformer differential: % = (IH/IL - TH/TL) / TH/TL * 100
  
  Last post by russgentile 2 Days Ago
- I'm looking for the best partial discharge training.
  
  Electrical Testing Talk 3
  
  Does anyone have any suggestions on partial discharge training?
  
  Last post by Kalbi_Rob 2 Days Ago
- Am I missing something here? Is the right answer here? If so can someone explain?
  
  NETA Level 2 Exam 14
  
  A 4-20mA single CT has a max range of 150 amp what is the amps at 14mA? 140A 105A 150A 90A
  
  Last post by bec51392 4 Days Ago
- Reduced current let-through
  
  NETA Level 3 Exam 3
  
  I understand that using current limiting fuses can accomplish this. However I was under the impression that lowering the instantaneous settings within the trip...
  
  Last post by GrayTard 1 Week Ago
- reverse polarity voltage
  
  NETA Level 4 Exam 3
  
  Which of the following is used to suppress the reverse polarity voltage spike in an electrical relay? FET, resistor, MOSFET or ....?
  
  Last post by GrayTard 1 Week Ago
- Reactance of a synchronous machine
  
  NETA Level 3 Exam 5
  
  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 GrayTard 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
- Inverse Time Overcurrent Relays and Curves Explained
  
  Overcurrent relaying is one of the most simple and economical types of protection used for power system feeders, transformers, generators and motors. Since the advent of simple electromechanical... Continue Reading
  
  Posted By testguy July 28, 2021
- 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 January 4, 2021
- 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
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- Remembered NETA 2 Questions Help
  
  NETA Level 2 Exam 27
  
  To Whom it May Help: Here are some questions from my NETA 2 test that I remembered but did not know. All help is greatly appreciated! I did not...
  
  Last post by Izeldeen 3 Weeks Ago
- VLF Dead break terminations - 21.1kv test voltage recommendations
  
  Electrical Testing Talk 16
  
  We are out on a solar farm testing 35kv cable with Dead break terminations. The termination is 21.1kv rated but 35kv class. Cable is 35kv xlpe cable. Neta...
  
  Last post by ericnessl 4 Weeks Ago
- Am I missing something here? Is the right answer here? If so can someone explain?
  
  NETA Level 2 Exam 14
  
  A 4-20mA single CT has a max range of 150 amp what is the amps at 14mA? 140A 105A 150A 90A
  
  Last post by bec51392 3 Days Ago
- Applying a solidly grounded wire after hipot test
  
  NETA Level 2 Exam 13
  
  Applying a solidly grounded wire immediately after performing a high-potential test:
  
  Last post by Izeldeen 3 Weeks Ago
- Transformer Winding Resistance
  
  Electrical Testing Talk 12
  
  Hi everyone, I hope you all doing okay. I wonder something and you are the best crew i can ask :) When we test winding resistance test for transformer we...
  
  Last post by SecondGen March 29, 2021
- How long should you wait before performing a fall-of-potential test after rainfall?
  
  NETA Level 2 Exam 10
  
  How long should you wait before performing a fall-of-potential test after rainfall? I answered 24hours, is this correct?
  
  Last post by Izeldeen 2 Weeks Ago
- Doble M4000 Temp Sensor Help
  
  Electrical Testing Talk 10
  
  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 bec51392 2 Weeks Ago
- ANSI Numbers help
  
  NETA Level 2 Exam 9
  
  I know there is no easy way to remember all of the ANSI numbers that would be found on the NETA 2 test. However if anyone has any tips or tricks to help you...
  
  Last post by alf583 2 Weeks Ago
More topics: Electrical Testing Talk | Relay Testing Talk | Safety & Arc-Flash | NETA Exam Prep | NICET Certification Talk
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Hello all, I recently was testing a 750kVA dry type distribution transformer for regular maintenance. The transformer system voltages are 25kV - 600/347V....

On a window CT with primary power going through H1-H2, What terminal what the secondary voltage exit from? A) Line Side B) Load Side C) X1 D) X2 This...

Can you tell me what each of the operands represent in the solution formula for transformer differential: % = (IH/IL - TH/TL) / TH/TL * 100

Does anyone have any suggestions on partial discharge training?

A 4-20mA single CT has a max range of 150 amp what is the amps at 14mA? 140A 105A 150A 90A

I understand that using current limiting fuses can accomplish this. However I was under the impression that lowering the instantaneous settings within the trip...

Which of the following is used to suppress the reverse polarity voltage spike in an electrical relay? FET, resistor, MOSFET or ....?

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

To Whom it May Help: Here are some questions from my NETA 2 test that I remembered but did not know. All help is greatly appreciated! I did not...

We are out on a solar farm testing 35kv cable with Dead break terminations. The termination is 21.1kv rated but 35kv class. Cable is 35kv xlpe cable. Neta...

A 4-20mA single CT has a max range of 150 amp what is the amps at 14mA? 140A 105A 150A 90A

Applying a solidly grounded wire immediately after performing a high-potential test:

Hi everyone, I hope you all doing okay. I wonder something and you are the best crew i can ask :) When we test winding resistance test for transformer we...

How long should you wait before performing a fall-of-potential test after rainfall? I answered 24hours, is this correct?

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...

I know there is no easy way to remember all of the ANSI numbers that would be found on the NETA 2 test. However if anyone has any tips or tricks to help you...

Join our team to learn and become efficient, under the guidance of Senior Test technicians, in all aspects of acceptance and maintenance testing of power...

[COLOR="#2c99e2"]Position:[/COLOR] Electrical Maintenance & Testing, Field Services Technician – Georgia [COLOR="#2c99e2"]Description:[/COLOR] ...

[COLOR=#2c99e2]Position:[/COLOR] Electrical Maintenance & Testing, Field Services Technician – Pacific Northwest, (Oregon / Washington) ...

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