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- Instantaneous Trip
  
  P&C / Relay Testing Talk 1
  
  Why do I not see inst trips on feeders fed from a 69/12kv 20MVA bank but I do at 138/12kv >20MVA banks?
  
  Last post by GreenHornet 2 Days Ago
- Most common cause of failure of electrical equipment in service
  
  NETA Level 2 Exam 3
  
  What is the most common cause of failure of electrical equipment in service? I put surges. My second guess would be humidity. Thoughts?
  
  Last post by albaloshi4u 4 Days Ago
- Number of cycles completed in one second
  
  NETA Level 2 Exam 10
  
  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 yagsman 6 Days Ago
- How do you Defeat Ground Fault with Primary Injection on Eaton 310+? Trip Unit
  
  Electrical Testing Talk 12
  
  Does anyone know how to defeat ground fault on these trip units during primary injection? I know you can series the contacts but that is a pain. Im wondering...
  
  Last post by Kalbi_Rob 1 Week Ago
- Digitrip 310+ Test Kit - How to Remove the dummy connector?
  
  Electrical Testing Talk 2
  
  Hello! I just got a secondary injection test kit for a digitrip 310+ and I just can't take out this dummy connector to make it a male one... it seems to be...
  
  Last post by cmferrer 1 Week Ago
- Utility rate per kilowatt hour
  
  NETA Level 2 Exam 2
  
  The electric utility provider charges 15.088 cents per kilowatt hour of electricity. In a month a customer uses 236 kilowatt hours of electricity, how much is...
  
  Last post by DanTheMan 1 Week Ago
- Determine the RMS amplitude of this sinusoidal waveform
  
  NETA Level 2 Exam 4
  
  I know this is a simple question but can someone help explain this? Determine the RMS amplitude of this sinusoidal waveform, as displayed by an...
  
  Last post by DanTheMan 1 Week Ago
- Requirements to operate a power circuit breaker
  
  NETA Level 2 Exam 2
  
  I dont understand. For the following question how is "hazards" not the most important thing to understand. Before personnel are allowed to operate a power...
  
  Last post by SecondGen 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
- 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 2 Weeks Ago
- 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
- 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
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- Building fundamental knowledge of Relay Protection
  
  P&C / Relay Testing Talk 15
  
  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...
  
  Last post by cotton 2 Weeks Ago
- What’s the best way to operate power dB
  
  Electrical Testing Talk 14
  
  What do you guys use for computers and the best way to set up power dB without failing? Operating this system is awesome...when it works. Either having...
  
  Last post by Nick1234 January 20, 2020
- How do you Defeat Ground Fault with Primary Injection on Eaton 310+? Trip Unit
  
  Electrical Testing Talk 12
  
  Does anyone know how to defeat ground fault on these trip units during primary injection? I know you can series the contacts but that is a pain. Im wondering...
  
  Last post by Kalbi_Rob 1 Week Ago
- Circuit Breaker Simulator
  
  P&C / Relay Testing Talk 12
  
  Does any have or use a CB simulator during functional relay testing? Haven't had much luck looking else wear online. If you do, can you provide any details you...
  
  Last post by RelayBill April 4, 2020
- Number of cycles completed in one second
  
  NETA Level 2 Exam 10
  
  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 yagsman 6 Days Ago
- 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
- Determine total reactive resistance of this circuit
  
  NETA Level 3 Exam 9
  
  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...
  
  Last post by Kalbi_Rob August 17, 2019
- Community Posting Competition Fall 2019 - Enter to win cool prizes!
  
  News and Announcements 9
  
  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 yet another community posting...
  
  Last post by testguy December 6, 2019
More topics: Electrical Testing Talk | Relay Testing Talk | Safety & Arc-Flash | NETA Exam Prep | NICET Certification Talk
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Why do I not see inst trips on feeders fed from a 69/12kv 20MVA bank but I do at 138/12kv >20MVA banks?

What is the most common cause of failure of electrical equipment in service? I put surges. My second guess would be humidity. Thoughts?

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...

Does anyone know how to defeat ground fault on these trip units during primary injection? I know you can series the contacts but that is a pain. Im wondering...

Hello! I just got a secondary injection test kit for a digitrip 310+ and I just can't take out this dummy connector to make it a male one... it seems to be...

The electric utility provider charges 15.088 cents per kilowatt hour of electricity. In a month a customer uses 236 kilowatt hours of electricity, how much is...

I know this is a simple question but can someone help explain this? Determine the RMS amplitude of this sinusoidal waveform, as displayed by an...

I dont understand. For the following question how is "hazards" not the most important thing to understand. Before personnel are allowed to operate a power...

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...

What do you guys use for computers and the best way to set up power dB without failing? Operating this system is awesome...when it works. Either having...

Does anyone know how to defeat ground fault on these trip units during primary injection? I know you can series the contacts but that is a pain. Im wondering...

Does any have or use a CB simulator during functional relay testing? Haven't had much luck looking else wear online. If you do, can you provide any details you...

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

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...

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 yet another community posting...

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