Sir no problem in video. I want to know smthg more..... How is the connection of relay when we use REF for a line? and What is REF non directional stage 1 start or stage 2 start and stage 3 start
Today I read this scheme from the book of JB Gupta, I hardly understood the working principle, but after watching this video, it's crystal clear. Thank you
Ye video dekhkar aaj muze lag raha hai interview me agar muze pucha jaye aur me definitely iska ans kar pauga and mera impression bhi positive rahega..
Sir apane bahot achha bataya hai.....I m also electrical engineer....but college me jitana nahi samjha usase kahi jyada ap ne achha smjhaya hai....thank you very much sir🙏🙏🙏 for your efforts....
Very important for field engineers! Very well explained. One more point can be added like why in CT secondary current flows opposite concept of P1-P2 ~ S1-S2..so that if it gets reversed in wiring that fault can also be found.
Great upload. You explained really well. Next topic: How to choose the CT ratio and C value (C100, C200 etc) so the CT doesn’t saturate during a fault?
1)Why nct is not getting saturated but phase CTs are getting saturated due to high fault current? 2) What is the zone of protection of lvref and hvref in a 33/11kv substation?
Very clera and sound as well as informative, Thanks . Please make a detailed video on transform oil testing and action incase of oil contain danger gas, furan test analysis and action.
Jab resistriced zone ke andar fault hota hai, tab bhi current I2 lowest resistance path kyun nahi karta? Kya tab stabilizing resistance series mein nahi hota hai?
Sir. I would like to know the ceiling fan rotates in anticlock wise direction. And blades are skewed in such a way that air comes downward. If it make direction clockwise blade will be made skewed opposite of anticlockwise . Is it work. Why you make direction only in anticlock why not clockwise. But tables fans were in clock wise. Please explain sir. I am awaiting
Mera ek question hai ki Books me likha ki differential relay ko jab transformer (delta star) k protection me lagate h to CT delta side star me aur star side delta me connect hota h..but actually Maine power transformer (delta star) me dekha h ki star side CT ko bhi star connected kar rakha h...aisa kyun karte h? Aur kon sahi h books ya practically.
Mere solar plant me 5mva TRAFO ka REF tripping relay operate hota hai jab outside area (substation) me earth fault hota hai.. restricted area k bahar k faul pe operate nahi hona chahiye na... Stabilizing resister work nahi kar raha kya? Please suggest more....
Sir you have explained beautifully. Thanks for sparing time & making such informative video . I have few queries, request to address them . 1. Why this REF protection only use in transformer having capacity equivalent or more than 2.5 MVA? 2. REF protection Relay will be installed in primary side of transformer or secondary side ? Once again thank you very much for this video . 🙏🙏
Sir ji In case of high currents of external faults, only phase CT is getting saturated, not Neutral CT. Why so? And in case of internal earth faults, why neutral ct is not getting saturated, tgough the cirrent intensity lies similar to case of external faults... Please help sir ji
नमस्कार सर् आप बहुत अच्छा से समझाते हैं और समझ में भी आता है सर् एक request थी आप से ड्राइंग कैसे read किया जाता है ओ भी एक part by part सर् समझाए आप की बहुत कृपा होगी हम सब पर
Restricted Earth Fault Protection scheme explained very well and in a very easy to understand manner , sir .. One request sir .. can you please make video on topics , [1] 400 KV Busbar differential Protection scheme and [2] 400 KV Line Distance protection relay scheme ? please do the needful sir .. Thanks & Regards ..
@@electricalwithabhishekjoshi Thanks for your quick response Sir Your explanation is very impressive Please make a video on Alternator testing like PD Test Elcid test Tan delta test And on Complete protection of Alternator...
Sir please yeh baat clear krna k CT k secondary me current direction opposite kyo hota hai kis law k according. Aur ye sarbhi secondary core me hota hai??
Abhishekji, beautifully explained. Can you just add, what will be the scenario if the transformer winding is delta connected?How the CTs will be connected?
Sir jub line ct saturate ho jata he tab current ct se hote huye resistance ke through relay me kyo nahi jata jab ki pehle case me neglect hote samay to vaha se flow ho rha tha ?
Video Dikhne mein agar problem ho rai ho to comment karke bataye.. Kya Video wapas banana chahiye??
No problem.. Ok hey.
please make on insta. overcurrent, tcs, lbb and autoreclouser
Sir jee Industries me cable Selection ke bare ma dijhaye..with current Dansity and sqmm and Amp. Or Cable try type and Selection
Sir no problem in video. I want to know smthg more.....
How is the connection of relay when we use REF for a line? and
What is REF non directional stage 1 start or stage 2 start and stage 3 start
No sir. Great.
Your explanation is awesome
Your are great sir i am from Pakistan .Even difficult things become easy with your way explaining.
Today I read this scheme from the book of JB Gupta, I hardly understood the working principle, but after watching this video, it's crystal clear. Thank you
Most welcome...
It's is very good Subject sir that you clearlified in very easy way.It support us for in troubleshooting in problem
Ye video dekhkar aaj muze lag raha hai interview me agar muze pucha jaye aur me definitely iska ans kar pauga and mera impression bhi positive rahega..
Sir apane bahot achha bataya hai.....I m also electrical engineer....but college me jitana nahi samjha usase kahi jyada ap ne achha smjhaya hai....thank you very much sir🙏🙏🙏 for your efforts....
Most welcome..
bohat he Alaaa! Allah pak apko mazeed kameabi dy ameen
Shukriya..
Very well explained. Clearly understood function of stabilising resistance. Thanks!
Bahut badhiya bhaai..mai b bahut pareshan tha..Books me thoda sa topic de rakha tha but ye to bahut bada aur important topic ha...
Very important for field engineers! Very well explained. One more point can be added like why in CT secondary current flows opposite concept of P1-P2 ~ S1-S2..so that if it gets reversed in wiring that fault can also be found.
reverse the polarity then will be a fault creat automatically
Great upload. You explained really well. Next topic: How to choose the CT ratio and C value (C100, C200 etc) so the CT doesn’t saturate during a fault?
Video banate hai..
Good Explanation and I understand it very well. Good way of teaching. Love from Pakistan.
You are amazing tutor such a nicely explained. Thank you so much.
in such busy schedule sir you have attented my doubt after cmnt love u sirrrrrrr
🙏🙏
Perfectly getting clear concept sir.....
Thank you so much. Your explanation is so much great.
Most welcome...
Without any fault occurence, what is the direction of secondary current in the line CT
One of the best vedio Abhishek Ji.
1)Why nct is not getting saturated but phase CTs are getting saturated due to high fault current?
2) What is the zone of protection of lvref and hvref in a 33/11kv substation?
Due to NGR
Dear sir , I'm a big fan of your teaching style ....
Thank you Satish..
Full package for electrical.,. excellent sir
Thank you...
Very clera and sound as well as informative, Thanks . Please make a detailed video on transform oil testing and action incase of oil contain danger gas, furan test analysis and action.
Thankx buht kuch sekha ap say sir
Most welcome.. 👍
Best explanation ever ❤🎉
Well done, bro.
I like your presentation very much.
kya gazab explain kiya hai🙌🙌🙌
Bilkul samajh agayi bohat shukria .
Thank you Sir I understand all your explanation. Very nice video Sir
Sir aapki samjhane ka yahi tarika chahta tha ❤🙏
Gr8 sir 👍👍🙏, aaj clear ho gaya REF, differential protection ka bi video bunaya
Sir,You are explained very well
Super sir excellent concept given very understandable thanks for making this video sir🙏
Awasome brother I learnt clearly from this video video is very helpfull thanks for your video
Jab resistriced zone ke andar fault hota hai, tab bhi current I2 lowest resistance path kyun nahi karta? Kya tab stabilizing resistance series mein nahi hota hai?
yes same question arised in my mind
Explained very well sir. 😊
Sir. I would like to know the ceiling fan rotates in anticlock wise direction. And blades are skewed in such a way that air comes downward. If it make direction clockwise blade will be made skewed opposite of anticlockwise . Is it work. Why you make direction only in anticlock why not clockwise. But tables fans were in clock wise. Please explain sir. I am awaiting
Thanks for such an amazing explanation Sir
Mera ek question hai ki
Books me likha ki differential relay ko jab transformer (delta star) k protection me lagate h to CT delta side star me aur star side delta me connect hota h..but actually Maine power transformer (delta star) me dekha h ki star side CT ko bhi star connected kar rakha h...aisa kyun karte h? Aur kon sahi h books ya practically.
Bahut achhe se samajh me aaya sir 🙏🙏
Thank you Bhuwneshwar..
Very Nice Explain And More Knowledgebal vedio Sir 👍👍
so simple teaching sir I could easily understand
In normal working condition what is the current flow direction in current transformer
Bahut ache se samjhaya sir
Sir..
Kya Restricted earth fault relay ko transformer ke delta connection ke liye use nhi kar sakte...
Sirji.....Earthing and neutral ka RYB k sath sequence kya hota h.... Transmission nd distribution line m
Great explanation sir...thank you so much
Iske jagah pe efr use kr sakte hain kya with 4 ct
Sir ,in normal condition 3 phase ct seconary current also flow which can flow through the earth fault meater and trip the circuit
Sir need help sir ..
My 14pin relay many time fault then I change but some time use but after some time then also fault
Need help sir..
Precisely explained 👌👌
Amazing Explanation 🎉
Mere solar plant me 5mva TRAFO ka REF tripping relay operate hota hai jab outside area (substation) me earth fault hota hai.. restricted area k bahar k faul pe operate nahi hona chahiye na... Stabilizing resister work nahi kar raha kya?
Please suggest more....
Amazing video, your videos are very helpful in my internship ❤️❤️❤️
Thank you...
@@electricalwithabhishekjoshi sir please help .mere ko ek book chahiye jisme sab kuchh hoga please bataye
Kaunse topic pe book chahiye?
@@electricalwithabhishekjoshi testing commissioning and relay
Sir you have explained beautifully. Thanks for sparing time & making such informative video . I have few queries, request to address them .
1. Why this REF protection only use in transformer having capacity equivalent or more than 2.5 MVA?
2. REF protection Relay will be installed in primary side of transformer or secondary side ?
Once again thank you very much for this video . 🙏🙏
Ref is primary side also primery and secondary side
Fpro 116 and solkar relays k liye kuch information btaye plz
Sir ji
In case of high currents of external faults, only phase CT is getting saturated, not Neutral CT. Why so?
And in case of internal earth faults, why neutral ct is not getting saturated, tgough the cirrent intensity lies similar to case of external faults...
Please help sir ji
Saturation of CT is a rare event bcoz we use PS class CT.
Very important information sir Thank you
Sir please explain MC61A earth fault relay?
AMAZING....
PLEASE MAKE VIDEO ON CT SATURATION........
Sir nhi aayi ,iska real lyf ka picture dikha dijiye or video bnao
Sir please explain the difference between motor protection and transformer protection
Very helpful for understanding sir
Very informative video ... 👌🙏
Really Explained very well
Thankyou
Sir synchronising pe bi video dalo with drawing ki kaise konsi pt use hoti hai or kaise bus ka selection hotha hai
नमस्कार सर् आप बहुत अच्छा से समझाते हैं और समझ में भी आता है
सर् एक request थी आप से ड्राइंग कैसे read किया जाता है ओ भी एक part by part सर् समझाए आप की बहुत कृपा होगी हम सब पर
Vikash,
Drawing wali Playlist dekho.
sir 51N or 50N pr video bna do please
Sir TB ke bareme kuchh bataye aur, iske jyese aur device kebareme bhi bataye...
Restricted Earth Fault Protection scheme explained very well and in a very easy to understand manner , sir .. One request sir .. can you please make video on topics , [1] 400 KV Busbar differential Protection scheme and [2] 400 KV Line Distance protection relay scheme ? please do the needful sir .. Thanks & Regards ..
Sir Metrosil ka kya use h
well explained sir 👍👍👍👍👍
Hi Abhishek Ji
Plz make a video on Back Up Impedance protection of Alternator
Okay Yogendra..
@@electricalwithabhishekjoshi Thanks for your quick response Sir
Your explanation is very impressive
Please make a video on Alternator testing like
PD Test
Elcid test
Tan delta test
And on
Complete protection of Alternator...
Sir please yeh baat clear krna k CT k secondary me current direction opposite kyo hota hai kis law k according. Aur ye sarbhi secondary core me hota hai??
minimum kitna load ho phr hamy cT lagani hoge.kia hm single phase meter per CT laga sakty hai?sir plz guide kare
What is neutral CT ratio and phase CT ratio. Could you explain with actual fault current values, thanks
Sir ye metrosil kya hota hai?? Kyu use hota hai
Sir beautifully explained. Could u pls tell us about high impedance and low impedance REF
Sir
Ref setting in relay = 0.3 I/Ino what does this means?
Such a good explanation ❤
What will be time delay to operate ref protection
Excellent explanation sir.thank you
how calculate stabilizing resistance vallue?
plz make a vedio about this matter.
Thanks sir from Pakistan
Most welcome..
Ye current ki direction CT ki secondary me opposite ku hoti hai.. primary ke direction ke comparison me
Winding agar delta me hui to?
Abhishekji, beautifully explained. Can you just add, what will be the scenario if the transformer winding is delta connected?How the CTs will be connected?
Sir what is droop ct in ht alternator
Very Good Explain..very nicely ..I have one queation Line CT and Neutral CT SHOULD BE ONE POINT EARTH OR SEPERATE EARTH..
Good explanation, great bro
you earned a subscriber sir
Great knowledge sir really apriciate
Well explained. Thank you
Sir nice explanation. Dear sir i think stabilizing resistance will be in opposite side of the relay.
thanks dear , you have explained well
Most welcome...
bias differential protection also give earth fault protection then why we need restricted earth fault protection ?
Wonderful explanation good knowledge
Sir jub line ct saturate ho jata he tab current ct se hote huye resistance ke through relay me kyo nahi jata jab ki pehle case me neglect hote samay to vaha se flow ho rha tha ?
Thank you sir 😊 for answer my comment question thank you very much 👍🏿🙏
Very Good Explanation ..pls let us know the CT Sceondary Grounding will se sepearately line ct secondary and neutral CTSeconday seperate Grounding..
Sir tell about 67 relay in switchgear. When it is parallel condition.