Directional Relays | Power Systems | GATE (EE) Exam | Ankit Goyal
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Subscribe Now - unacademy.com/... In this session, Ankit Goyal will be discussing about Directional Relays from the Power Systems. Watch the entire video to learn more about Directional Relays which will help you crack GATE & ESE Exams. Let’s Crack It!
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In this video, Ankit Goyal (Co-Founder of Kreatryx and AIR 1 in GATE 2014) explains how to place the directional and non-directional relays in a power system. There is a myth that we can directly place directional relays at load end and non-directional relays at source end but that is not entirely true so a fool proof method is described to determine the position of relays.
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at 37 I am still learning my engineering graduation, and at this age ( because i was an average student) Now , i feel how super their (his) mind is to understand these engineering subjects so clearly, and AIR -1 is very very tough to achieve ( it's a clear representation how clear his mind on all these subjects and calculations)
Respect to him.❤
what a great explanation. The way of teaching is superb.
Hi Ankit, I am practicing EE in Australia saw your video; I am so impressed and happy to see that our young generation in India is so talented. Keep this movement up so that more and more people will get benefit...
How is masters in EE in Australia
Mr. Ankit
thank you thank u and thank u for the excellent video and all the effort u put together to let everyone fully understand how the directional relay works.
I greatly appreciate it.
I have couple questions if you don't mind
10 based on your explanation then relay 7 is non directional then we can added it to relay 1 and 6 to be back up to relay 4 correct?
2)please if u don't mind can u upload couple problems about the directional relays so we can be perfect about any questions either conceptional and problems?
please please reply and don't ignore me
all your videos are helpful and grateful to me
You are a boss, I am really pleased. Appreciated !!
Want a lecture on relay setting (time delay setting, tap setting.)
सर अविश्वसनीय परफॉर्मेंस आज तक मै कंफ्यूज था आज क्लीयर हुआ कोटी कोटी धन्यवाद्
sir please, make a video on max. torque angle condition in differential relays(condition to get max torque in relays )
Very well explained.. Easily understandable... Although, At 8:30 why is it required to use directional relay? Direction is same as prefault direction.
by the same logic if fault occurs at bottom line
The plug setting of negative sequence relay is 0.2 A the current transformer ratio 5:1. The minimum value of line to line fault current for oprarion of relay is????pls explain sir
Everytime i face diff to recall thsi concept n i see this video...it just crystal clears my doubt...best explained
Excellent job. first time clear this concept of directional relay
Sir there is a question in power system stability which is asked 2017 P2 related to power angle....!
I think this question will give complete clearance about stability...!
Plz check once ..!
Dear Sir, Can you please explain distance protection with characteristics. Thank you for sharing knowledge
Sir, plz teach us a distance protection relay...you explained directional over current in that video is really good to understand.In distance protection relay need of under reach and over reach transfer trip...
If possible, make a video on CT class classification ie, class: 5P20, X, PX TPS on different characteristics & which class CT used for exact protection. Eg; 5P20 using for overcurrent protection, why? & class :PX using for differential protection, why? What is different between those class CT's.
your teaching methodology is extraordinary....
Respected Sir,
Please Upload video on
1. Power System Stability
2. Bode Plots
3. Transients in DC Circuits
4. Inverters
Thank you Sir
Sir please explain fault in field winding of synchronous generatorwhat is the problem if it works as induction generator ? It still will be producing power.
Sir please say how was the directional relay looks like?.Is there any pin number or picture of that relay .If you known the pin number or picture of that relay sir please reply me .
Ankit sir you are Master in Electrical Engg subjects. Plz provide us a video on stability equal area criterion and Synchronous Machine.
Sir I have a doubt. What if there is two relay on generator line prior to parallel lines and a parallel generator is also connected to the bus bar. Then what will be the nature of the two relay on generator line.
Helpful explanation... Keep it up sir... And please make a video on topic distance relay.. I will be thankful to u
Dear sir, Does the directional relay operate even the current is less than normal fault current?
Ankit Sir,
How to recognize Feedback topology in Feeback Amplifier circuits...?
Please choose this topic for upcoming video course.
So simply explained !Thank you very much.
Sir please upload the videos for ADC ,SAR AND DVM ,how they work specially DVM
awesome and useful too.please give a short video on circuit breaker as per gate only.not need to go from basICS.
how come relay 2 is directional....relay 4 is directional that can be understood coz at R4 direction of current flowing changed but u said similarly at R2 also directional relay....according to the given condition when fault occurs between 3 & 4 current at R2 doesn't change its direction so how come directional relay?
Same doubt.
assume a fault b/w 1 and 2 and you will get your ans
Relay 2 must be directional relay and operate when fault will be between 1 and 2
Thankyou sir for good concept bt can we expect other pattern questions in directional relays? And sir please also tell us is load frequency control topic is required to study in power systems because till nw only 1 or 2 questions were asked and in syllabus also they have didnt mentioned specifically.
Thanks in advance.
Thanku sir ...we love and respect you and your team..
explain about low impedance and high impedance differential protection in detail.. explain where they will use and how tripping is occuring in high impedance differential
Directional induction type over current relay is used for protection of
A)long transmission line
B)large power transformer
C)ring main system
D)radial distribution line
Which one is the correct ans plz reply sir plz
1
Hello sir ...I watch ur previous videos it is very good for me.but I have a question for very small topic this is not related to any subject or exam it just related to every engg my question is what make me a good engineer? I can not find answer for this? .......I know this is a silly question but if u want to give answer, it will helpfull for me.
Sir I understood whatever u taught us...but why Relay 7 cannot be used as a backup Relay...in the video u told that as 1 and 6 are nondirectional Relay they will detect fault and then operate...in the same way if we consider the load to be passive then 7 must be nondirectional and therefore it can also be use as a backup....sir plz reply sir...after this I'll be 100% confident in this topic
If one of two parallel feeder is opened are the setting of over current relay still the same?
Thank you Sir...Please clear the same thing for over current relay too
what is direction of current for AC? We can say energy direction. how can we measure the direction of ac energy?
Awesome video....thank u sr ...plz upload problem solving of protection gate question...
So would you please explain the power triangle not active, reactive or aparent power but pf versus generations
Very very good for gold knowledge for me about backup relay
Sir please merz price protection per numerical bata dijiye please aur relays pe bhi numerical bhi sir it will very helpful sir kyonki koi kisi coaching me ye nahi samjhata.
What is voltage doing in 67? How is the voltage helpful in 67? What does it do to determine the fault?
Very good explanation
Concepts are explained very clearly.
Sir please make a video on how to find the configuration in bjt and opamp such as voltage series, voltage shunt, current series, current shunt, current sampling voltage feedback etc.
Please upload videos on working principles of different relays
instead of s2 if there is a grid and grid can supply or take current will relay 5 be a directional relay ?
Thank you sir.. then please upload CT & PT construction and working principle and its terminal connection also..
Thank you sir, please provide video for basic electrical from competitive point of view.
respected sir your videos are extremely good and helpful it is not possible for me how I thank to you
Sir you have done a mistake the source side relay must be directional relay because if the fault occur in between of the source and the first relay from the left side of the circuit the current flow in opposite to the original rated current and relay trip but if the fault some where else in the circuit if it is a non directional relay it get trip which is not desired so it must be directional with the tripping when over current flow toward the source.
What?! Protection must be directional since the line have both side supply! If you want to make it nondirectional you have to coordinate it with maximum fault current in reverse direction.
Thanks for this video please make a video for how to calculate and configure directional protection
please upload video on construction and operating principle of directional relay
...please and also three phase directional relay
Thank u sir....... Please make a lecture on inverter, buckboost converters......
If fault occur in generating bus then which relay used?
So what the case we use all non directional relay as cost aslo low and all works as backup know?
excellent explanation Ankit good job thanks
Sir, I can't understand how current can flows in one direction in case of ac.Please elaborate.
Great work sir.
Can you please provide video of percentage of winding protected in power system ?
Why we can't simply use non-directional relays? Fault currents are anyways going to be large enough for them to be detected by non-directional overcurrent relays and since they are insensitive to direction of current, non-directional relay would also have worked?!? Sir, I'm really thankful to all of yr videos BUT it looks you've got few problems in here. GATE question specifically mentions directional *overcurrent* relay and not reverse power relay (both of which falls under directional relays) while what you explained was reverse power relay. Sir, to put it simple language, if it is just about locating fault we could've easily used non-directional relay as I said earlier. It is due to the reason of discrimination ( least outage) that we use directional overcurrent relays. In fact some old GATE question asks to make selection so that it'd give _proper discrimination_.
Though ans is correct, this is the reason that this method of coming to answer doesn't works for ring feeders and for faults to the left of left most breaker while in practice it'd be perhaps place with highest fault severity. I'm no one to claim more knowledge than you but I felt I should put my opinion here.. Thanks for all of your other videos, they're immensely helpful.
Thanks sir....sir i have question..actually sir non directional relay me hmko direction se matlab nhi hai jab hamara fault hoga to non directional relay bhi trip kar jayega aisa kyun sir?
Non-dir relay will operate for faults in any direction.
It doesn't check in which direction the current is flowing.
Sir do u teach in coaching class ?
Direction of current isn't a correct way; it should be phase difference. However, I love the way you teach.
thank u sir i am expecting the video on impedance and admittance matrix
Great Work Sir,
Please Share some Examples based on Directional Relay
Sir please make vedio on feedback topology in analog
sir your concept is very great
Thanks a lot.. Please keep uploading such kind of vedio ......thanks a lot ....
Best explaination sir. Please upload video on bode and nyquist plot
Sir please upload a video explaining three step distance protection of the transmission line
great explanation,good patience
Hello sir plz explain the construction of reactance relay
Nice Explanation thank you sir.
Thank you sir 👏
You make study so simple.
Load flow study video would be helpful sir.
I checked and found it
Once again 👏👏
Thank you sir.. Fr making my cncpt full clear about relay topic.. Sir can you upload some videos on inverter topic for gate preparation
Plz make video lecture on power system stability
Make a video on directional relay connection
very conceptual video sir. thanks.
Thank you sir.You h've made it clear and simple.
Explain Concepts of ring system in directional and non directional relay
Sir please upload a video for back up relay..asked in gate 2016
Thankyou sir.please make video on 3 phase transformer..
Thnk u sir for the video.Sir can u make a video for equal area criteria in power system
Thanks Sir...sir please provide video on effect of source inductance in converter of power electronics..
Rahul Kushwah sir plz make it on 3 ph 3 and 6 pulse converter having source inductance
Please upload a vedio on the question of signals and systems in gate 2017 set 1.
Big question
The answer is 0.097
Sir please explain the difference in starting process of induction mc and synchronous mc
sir plz make a video on feedback topologys in analog electronics
Sir When the load is synchronous motor then what we use when fault occurs at the synchronous motor terminal.
Instead of saying current is going to generator. You should say power is going to generator.
Current is sinusoidal, it has not a fixed direction in any situation. But, power has.
Please, someone correct me if i am wrong.
how to find valid sequence of operations of CB .??? like Q asked in gate 2007 .
Thank you sir...Explaintion is at the best
Please share video of negative phase sequence
Please explain about unsymmetrical faults
Please make a video on percentage of winding protected in protection topic
How detail should I study power system and what source should I use.¿
Really helpful Sir.
Sir plz upload videos for all types of commutation power electronics and plz tell whether u teach in delhi or not
Sir explain difference between high impedance and low impedance busbar