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Thank you! I have only one question: How much voltage do you apply on the HV side and where are the voltage and current measured?

Hi. Thanks a lot for this video! It is extremely helpful. My question is where can I find the theory behind why we need these tests and essentially why we consider a T-model as the zero-sequence network of a transformer? Thanks!

Congratulations

Thanks for this video! Really helped with some concepts I was struggling with

Wonderful Video

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Hello there! Your video is very beautiful. I like it a lot. I have been trying to talk to you for a long time. I am waiting for your response. Please give me a chance to talk to you,🥰

what is the total % z if parallel?

HOW DID YOU MARK THE CURRENT DIRECTIONS.?

Thank you! Very useful and good explained/delivered information!

very clear thanks

Thank you for explaining this so simply and easily! I feel like it is finally starting to "click" for me, thank you!

I have watched your series on paralleling transformers and very good explanation . Would you consider doing a video of paralleling transformers with different incoming (e.g., one being 138kV primary and one being 34.5kV primary and both being 13.8kV secondary). Same impedance with different ratios NLTC?

You forgot harmonics

In the intro, Are you in an airport runway? Lol

Why the loud music at the begining.. unnecessary =(

❤good explanation

What is the vector group of the transformer you used

How did you get XL instead of XC? Is it a TYPO?

Thanks for sharing your wreath of knowledge with others

This is a good video, I hope you get more viewers

Hello Sir, Really informative and very accurate. Can you please give me the book full name

Subramani

L-L faults do not result in I0 flow, do they?

Thanks for excellent video, just wonder how is the zero sequence impedance of the high side also included in this impedance, for me it looks like only the low side zero sequence impedance is included?

Why we applied 125.21 volt and 6.05 amps. How these values are calculated

Correct me if I'm wrong, but it seems like in both resistor and reactor grounding options, it is impossible to maintain an effective grounding system. What would be your suggestion to obtain an effective grounding?

Hello, in your Z0eq equation, where does the 1.02 come from?

A

Just wanted to give a thumbs up and a comment for making this video and sharing your knowledge

Nice Tutorial! Any chance I can have your excel spreadsheet template for time management (track your progress)?

A video to calculate a grounding transformer sizing for a DER system would be awsome. The transformer must allow an effectively earthed network and all other IEEE standards.

Thank you

Hlo sir how are you 😊😊

Sahi Kaha Tani

Thank you, i found the pattern but i didn't know the theory behind it. 3 phase ttr read the larger ratio , i have to divide by 1.5

Hi, great video! When calculating reactance, to get 0.5464ohms, the 9.49% has to be divided by 100% to get pu so that the Zbase can be used. With the resistance, this wasn't done, leaving 100.6ohms instead of 1.006ohms. Is that correct?

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What if the Z is in pu, does it make a difference?

Thank you for the informative session. I have a question. It was advised that zero sequence impedance for 3 phase, 3 leg core is 85-90% of positive sequence impedance. I am wondering about the basis for this thumb rule. Is it possible for you to share any literature titles where I can read this part in detail? Request your response.

Thank you, sir!

bussing can you explain this in sequence? explain Bus 1, then explain how and why it relates to bus 2, and then bus 3, and how it makes a ring bus. Then worry about explaining the individual buses

You provide a great detail sir, very useful.

At the 8:30 mark you sketch out the SLG fault equivalent circuit. Where do you get the "T-Model" value of 48.49% and the 10.26%?

Super useful, THANK YOU !!

Great, many thanks !

Great explanation!

Would like to mention that when power factor is lagging, it is referring to the current yes? Then in your example could you conclude that is it an inductive system?

Many thanks for putting together this video series I was struggling to understand how the applied voltage test would be performed on a Grdy x Grdy transformer, until I saw your diagrams showing the HO getting shorted along with the primary.