# Online Course 1-2: Phasor Drawings for Relay Testers (4 NETA CTDs)

Phasor diagrams are your one-stop-shop for understanding an electrical system at a glance. You’d think that all of the relay test-sets, phase-angle meters, and relays would use the same angle systems to communicate this important information to prevent confusion. Unfortunately, you’d be wrong.

Imagine you’re testing an SEL relay using a Doble test-set and RTS software and you set up a simple three-phase, balanced, metering test (ABC). Each device would display the following angles during a typical meter test:

1. A-Phase voltage = 0 degrees, B-Phase voltage = 120 degrees, C-Phase voltage = 240 degrees
2. A-Phase voltage = 0 degrees, B-Phase voltage = -120 degrees, C-Phase voltage = 120 degrees
3. A-Phase voltage = 0 degrees, B-Phase voltage = 240 degrees, C-Phase voltage = 120 degrees
##### Can you confidently match the angle system to the device? (Write down your answers and click to compare {RTS = ?, SEL = ?, Doble = ?})

RTS = 1, SEL = 2, Doble = 3

If you don’t knowĀ the difference between devices, you won’t be able to:

• Perform a meter test properly (more on meter tests in the future)
• Create effective test-plans
• Troubleshoot test-plan problems

Can you believe that there is a fourthĀ angle system out there we haven’t mentioned yet?

This course will introduce you to phasors and show you how to convert waveform drawings into phasor drawings so that you can understand what phasors areĀ and how they areĀ created. Ā You will be able to understand what is happening inside your relay and test-set with these topics:

• What are Phasors?
• How to Draw Phasor Diagrams
• Drawing Phasors with Lagging Angles
• Drawing Phasors with Different Scales

In a perfect world, these four lessons would be all you needed to become a phasor drawing master. You would be a master at understanding and drawing phasor diagrams in Megger test-sets and GE SR relays but, unfortunately, it seems every manufacturer has a different system for the angles in phasor drawings. Ā The remaining lessons in this course will help you understand all of the different angle systems used by test-sets from Doble, Omicron, and Manta Test Systems as well as the angle systems used by GE UR and SEL relays:

• Draw Phasors with Positive Angles
• Draw Phasors with Negative Angles
• Draw Phasors with Positive and Negative Angles

You get immediate access to the course if you pay with a credit card. All of our online courses include:

• High-quality video presentations introducing you to theory behind the topic to help you understand how it works
• Real-world examples that show you how to apply the theory
• Interactive exercises and quizzes that simulate the most realistic situations possible to help you learn by doing

You can watch a 10-minute video below that will give you an introduction to the topics covered in this course.

Still not sure if this course is right for you?Ā Test your knowledge with this quick quiz:

If you can’t answer all of the questions correctly,

This course is eligible for 4Ā NETA Continuing Technical Development Credits (CTDs). NETA Certified Technicians (Level III and Level IV) are required to earn a minimum of 48 CTDs every three years to maintain their certification. For more information about the CTD program and requirements, please contact the NETA office at [email protected] or 888-300-6382.

### Do you want to enroll more than one person into our online training courses? Ā No problem! Ā

You control who gets enrolled into the course via the āManage Teamsā page. Enroll one at a time, or upload your entire team via a simple csv file. Weāll automatically create everything they need to start the course and send them an email with their user name, password, and course links.

## 43 reviews for Online Course 1-2: Phasor Drawings for Relay Testers (4 NETA CTDs)

1. Anonymous Student

practicing always make you better having course material teaching you and showing you gives you a better understanding of what a phasor is

2. Anonymous Student

This course allows anyone with little or no knowledge to have an overview of how electrical devices works.

3. Peter Cogswell, NETA III, NICET III

The information in this course was very well presented. The practice sheets make the concepts more easily understood. I would recommend this course to anyone who is involved with Electrical Power Systems.

Great fundamental courses, preparing you for any relay testing out there.

Very good explanations on phasors and testing.

6. Customer Review Form

Excellent for NETA CEU’s

7. Student Review

Great tool!

8. Course Review

This course is a must for anyone that is responsible for testing or maintaining Power Systems.

9. Course Review

You should take this course “to further their understanding of 3 phase phasors and vectors”

10. Course Review

It is something that is required for the Modern Test Engineer

11. Customer Review

If you are in relay P&C, you need this course for success in your field

12. Customer Review

Anyone who loves to be a relay engineer, Chris is the guy who can teach you so well, who can make you be what you wanted to be as a relay engineer.

He is Second to none when it comes to teaching about relays. He is the Guru :)

13. Rob P.

In order to clarify already understood concepts and learn new ones in order to make themselves a more confident and reliable relay tester and commissioning tech. Also to be able to mentor in the correct manner to hopefully eliminate some of the so many bad habits of testers in the industry.

14. customer review

For people who feel they may know some details about relay testing but get confused by the different phase angles and phase rotation. It clears up the differences and opens your eyes to the need to be careful when trying to figure out phase rotation.

15. A Relay Course Evaluation

There isn’t a better, more thorough introduction to phasors that I’ve seen online.

16. A Relay Course Evaluation

This is one of the most helpful course for who is working on the field of switchgear and who willing to work on switchgear sector

17. customer review

Totally understanding how to deal with the phasor diagrams which I do need to test and commission protection relays
How do you feel about relay testing now?
Much easier to test
Why should someone take this course?
It will help you to improve the testing skills much more than only practicing with no scientific knowledge

18. A Relay Course Evaluation

If you want to take your relay testing knowledge to the next level, this course is a must!

19. A Relay Course Evaluation

Excellent

20. A Relay Course Evaluation

If you don’t have any experience about relay testing, this will be little bit hard to understand. However, in my case, I just watched this course so many times before relay testing and now, I can go on right way to do it with confidence. This is really valuable for your carrier as relay tester.

21. A Relay Course Evaluation

How did you feel about testing relays before the course?
I have never experienced before and just did bench top relay testing.
increase my knowledge regarding protection relay world and now I did my first job of SEL-700G for FAT testing.
How do you feel about relay testing now?
Very exciting and there are lots of fun and interests.
Why should someone take this course?
to verify their knowledge with other expert. since sometimes, they are very stubborn and tend to believe their experience.

22. A Relay Course Evaluation

I’ve done enough coursework in my life in various disciplines and trade crafts to have forgotten some of them. In all of my studies, I have rarely met an instructor who knew their material better, delivered it more clearly and effectively, or who obviously enjoyed teaching their subject more. His class helped me understand relay testing at a level far above what I knew before I took it. It would be difficult to overstate the value of his classes.

23. Public Review

Course was easy to follow and navigate

24. Public Review

Very good training to help someone understand what to look for in phase relationship with what you will see in the real world of relays.

25. Protective Relay Training Class/Course Evaluation Form

do the practice it will help in the end

26. Protective Relay Training Class/Course Evaluation Form Response

What would you tell someone who was thinking about taking the course?

Take it and do the hands on exercises

27. Public Review

The material is really hand on and helpful.

28. Protective Relay Training Class/Course Evaluation Form Response

It is good training to understand plotting Phasors.

29. Protective Relay Training Class/Course Evaluation Form Response

IT IS WORTH THE MONEY

30. Protective Relay Training Class/Course Evaluation Form

They should definitely take the course.

31. Ken Z

Great explanation of AC & DC circuits.

Different manufactures have a different reference, but knowing this helps explain some of the readings that I’ve had trouble with in the past.

32. Protective Relay Training Class/Course Evaluation Form

It is a definite must have for a relay tester!

33. Protective Relay Training Class/Course Evaluation Form

Great for beginners and journeymen

34. Test live_Page_0dollar

this course is good whether you don’t know phasors or need a refresher

35. Protective Relay Training Class/Course Evaluation Form

Absolutely worth it.

36. Protective Relay Training Class/Course Evaluation Form

go for it if you want to understand phase rotation and how to draw phasor diagrams

37. Tyler H. with Electrical Reliability Services Inc,

Great idea and I actually learned quite a bit. I think this is a great avenue for training.

I think this will help me a lot in future applications. I saved the provided excel sheet for future use.

Every NETA technician level 2 and up need to have this under their belt.

39. Course Review

I would definitely get this online training. Its broken down to the basics and takes you through a step by step process. You cant go wrong with this. It is worth every penny. It even has websites you can research if you’re unfamiliar with the material.

The videos and presentations on this course have been very helpful and given me a better edge on what is going on in the relay testing industry.

40. Protective Relay Training Class/Course Evaluation Form

take it

41. Protective Relay Training Class/Course Evaluation Form

This course will help you sort out which brands use which system to depict phase angles. That is super handy in the field.

42. Protective Relay Training Class/Course Evaluation Form

It is a good refresher on how to draw or troubleshoot using phasors.

43. Protective Relay Training Class/Course Evaluation Form

I encourage anybody interested in power system engineering to take this course. Thank you for having this course offered online, this is a big help like me especially that I am away “literally” for the training center (considering that I am from Southeast Asia). Thanks again.

\$49.95 USD