Transmission Line Protection (21)
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- เผยแพร่เมื่อ 2 ก.ค. 2014
- End-to-End Testing can appear to be a daunting task. However, any relay tester can perform successful end-to-end Tests with a basic a basic understanding of transmission line protection (or 21 impedance protection) along and some preparation before the testing is scheduled to begin.
The first video in our end-to-end testing series starts with an introduction to transmission line protection (also called impedance protection, 21-element protection, or line distance protection). A good understanding of basic line protection will go a long way towards understanding the different communication-assisted schemes typically used when end-to-end testing is performed.
This video expands on the descriptions found in The Relay Testing Handbook: Principles and Practice, Testing Line Distance Protective Relays (21), and End-to-End Testing. You can order any of these books in print or as digital pdf downloads at our store (relaytraining.com/product-cate.... - วิทยาศาสตร์และเทคโนโลยี
This is a very high-quality explanation.
I like how this puts things in easy to understand terms. Well done video and good illustrations.
Its quite helpful. I have been reading about distance protection for last 3 days but was confused, this video really helped me.
Chris,
I find that these videos are really help out. Please keep me posted on more transmission protection.
+Rene Montes Thanks Rene. There will be more videos in 2016. We're trying to get the next online training course out the door right now.
This is the very good and clear video for explanation of the distance protection relays. I will recommend it for a young people starting to study this theme.
Thanks for the suggestions you have provided here.
This record was really interesting and useful. I really enjoy watching it. I really thank you for preparing such a video.
Thank you very much for the great work.
Great Explanation... Really interesting and appreciating.
Nice job, Chris! I'm looking forward to seeing more videos! - Todd Patterson
Thanks Todd. I just received the first draft of the next video today, so it should be released in January.
Wow. This video is really good. Your explanation is so clear.
Super good! Thanks!
Thanks For Sharing .. Very Informative .. Simple Explaination
Very well Done!!
Perfect explanation....
Great Video. The animations and graphics get someof the more complex principles across far better than any powerpoint....including ours.
Dear Sir, The playlist is really amazing and it helped a lot in understanding the distance protection and end to end testing from scratch. There is request, if you can provide the same presentation then it would be really helpful.
Thank you for sharing
thx, this was very helpful
Thanks for sharing
thanks, very useful
please add more videos very informative and easy to follow, bought the books but this video tutorial is easy to understand
Its Amazing keep posting more videos.
You cleared many doubts
Thanks.
We're working on the next one in the series now and it should be posted in December.
thank you.....
Thanks 👍
perfect for me
thank you, great work it helps me so much, would you please make another video about the transformer and generator protection
Thanks. Those videos will come, but there's a lot more in the queue in front of them
Thanks..
good work
yes thanks you
Really good video sir
The video sound is pretty good, beyond my imagination
Great video. It cleared my doubt about the zones.
Can you please explain which relay will cover a fault in the part between the bus and the CT first?
That area should be protected by a bus differential relay.
can you provide a similar video on unsynchronized two terminal fault location estimation. PS great video!
+Nimmi Regmi Thanks. We'll put your suggestion on the list.
Good explaining
Just It’s better to explain protection parameters at any distance relay like seimens
Nice video sir 🙏from SAP
what is the difference between standby and sensitive earth fault protection?
transmission lines differential protection using wireless plz
what is the difference between swwitched and non switched distance protection?
Please post more videos. Thanks
More videos will be coming.
thanku sir , can you plese provide the link for CB Auto reclose function
Thanks. I'll put it on the list for a potential blog post in the future.
Could you do a video on how the logics are done in Distance protection numerical relays.. Say Autoreclosure logic especially for a one and half breaker scheme and all the other logics
Thanks for the suggestion. It's a good idea and we'll put your suggestion on the list of future ideas.
how do you know that the relay will detect the short circuit current as 8 A and voltage is 40 V at the 50% of the transmission line?
Suharti Hajar Impedance protection works for any voltage and current with a ratio less than the reach setting. That's one of the reasons we use distance protection. Any voltage/current ratio that equals 5 Ohms would be a fault 50% down the line
+Gautham Ashokkumar It could be 50/10 = 5 Ohms, but I already used 50V for a fault at the end of the line. The fault voltage will get smaller as it gets closer to the relay PTs, so a fault 50% down the line would be smaller that 50V. I randomly picked 40V. In the real-world, the amount of voltage drop would be dependent on the line impedance, fault impedance, source impedance, and strength of the sources.
i dont understand at time 7.08 min they said that at last 30 % of line1 if fault occurs adjacent relay operate first.why this ? adjacent relay is not issue na main issue is to protect genrator side (substation side). first relay 1 has to operatr?
👍
How can I attend online class for relay testing
relaytraining.com/online-protective-relay-training-v3/
I need details for training courses
Priyanka Pande We cover this topic in our Advanced Protective Relay Testing Training Courses at relaytraining.com/product/advanced-protective-relay-testing-training-courses/
What do you mean by doted line?
The dotted lines on the video
Where the Zone-3 will come?
It depends on the owner/operator. Some Zone 3s are large forward-looking zones with long time delays (60-90 cy), some are reverse-looking zones with long time delays, some look in the reverse direction and share information about the fault with another relay.
est ce que se trouve des documentations en français svp
salut Aness Nada, je ne pense pas qu'ils ont deja fait des traductions en Francais a ce sujet. Quand jai pris ce cours en ligne dans leur website c'etait en Anglais.
I am an Indian graduated in electrical and electronics engineering , in india thare is no carrier options i would like to move to usa , how can I get a job thare
Hey there, do you have subs? I read better than listen. Thanks
I uploaded the text with the video that should be visible by clicking the cc button
Valence Electrical Training Services Great a job :D but , do you have a subs in french Pllz ! I have to undrestand all things in this video but it's very hard in english , thank you .
We have no plans for french CC. Sorry.
Okay , Thank you
Asmae Hicham This post has the full text relaytraining.com/understanding-distance-protection-21-video/, so you could run a google translate on that, if that helps.