Why fuse in both terminals of DC | Interview Question | PiSquare Academy

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Why fuse in both terminals of DC | Interview Question | PiSquare Academy
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Опубликовано:

11 мар 2017

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Комментарии : 229

@hkhatri12 7 лет назад

this channel needs more subscribers..so much of knowledge in a lucid style. Thank you for making these videos

@mehrattaurrehman 3 года назад

Very informative lecture Muhammad Atta Ur Rehman Advocate LAHORE Pakistan

@balaramank433 6 лет назад

Link is not just a connection like a wire. Link is a metallic strip that helps in providing manual isolation during maintenance . The ampere rating for the links would be high when compared to fuse

@ThePiSquareAcademy 6 лет назад

Yes Mr. Balaraman, you are absolutely correct

@vinay5470 2 года назад

Can I know why not a positive fuse not going to respond when fault occurs after armature winding

@m.sampathkumar-035 2 года назад

@@ThePiSquareAcademy sir in distribution system all the mains are connect in parallel so the healthy section current enter in ph and leave through Neutral , so now other mains Neutral in grounded then the healthy section Neutral current is grounded through fault neutral wife sir, may be that's why in AC, Neutral link is used , Please give me reply sir .

@iulianigna6272 Год назад

@@vinay5470 because a fuse protects the circuit from short circuit failure, if you short the output of a transformer, basically you short a secondary circuit, that is not protected. There is no phisical connection between primary and secondary windings. I guess you talk about AC and phase fuse.

@srivatsaa.r.9936 6 лет назад

Just now i read why two fuses in DC and only one fuse in AC circuits. It is interesting to note. Never gave a thought about it. Good to note Vatsa

@alvindelacruz9597 6 лет назад

really very helpful and useful I can use this as a refresher more videos please

@r.rajakishorachary7035 6 лет назад

you are really amezing research done,I really namaskar from heart

@karsangalachar7545 2 года назад

Sir, after watching videos from pisquare Channel it gives good conceptual clarity, so I request you for uploading more and more video which enhance the understanding level of electrical engineer.

@kailashrajbongsi9528 6 лет назад

Great job..keep it up

@hannanpakthini7221 4 года назад

We had been given to u derstanding during my Elect Engineering graduation study that fusing a neutral line is foolish;dangeroud rather. If the neutral fuse blows down & if there is no proper earthing, there is a possibilty of elct shock. That's why, in neutral there is a dummy; a brass strip.

@priyasantoshpallantla8063 5 лет назад

Sir vry nice explanations...pls upload more videos regarding relay settings,fault calculations and maintenance of electrical equipments

@nikolatesla399 2 года назад

Wow .... Explained very well

@ManojKumar-se3pl 5 лет назад

Really helpful sir...Thank you

@ch.Rambabu-goud 5 лет назад

Nice teaching sir... good explanation...focus on problem with theory .... theory related problems get easily understanding

@SmartTechnology_vzm 6 лет назад

well explination about the dc fuse and ac fuse tnq sir.

@harivaghela6517 5 лет назад

Very good video and good way to delivered knowledge ,in real life how this thing going to happen with us

@maheshparise9214 6 лет назад

Awesome explaniationn sirr

@vivekrvivekr8931 6 лет назад

easy to understand the concept .pls make it more

@kailashrajbongsi9528 6 лет назад

Thnk u sir..its really very helpful

@deepakkumargupta7149 6 лет назад

Great sir.....really ..

@rajendrachoudhary8655 2 года назад

Very very good and helpful video sir g

@patakotisrinivas1918 7 лет назад

really helpful make more and more videos

@NAVEEN-eh7dw 4 года назад

Sir, How could you say that DC -ve terminal has some potential other than zero. Could you please explain that.

@selvakumart108 4 года назад

Wonderful video thanks a lot

@TonyStark-ih2wl 6 лет назад

Thanks sir this is very helpfull

@premtours 3 года назад

Thanks sir I want this type of videos

@jaganrajesh6724 4 года назад

Excellent explanation good

@SuperGurumoorthy 2 года назад

Excellent sir thank you

@shahbazshaikh7790 4 года назад

Thank you sir very nice explanation

@saiganesh3080 6 лет назад

thank you sir for your superb videos, sir if we grounded the -ve terminal of DC what happens

@srinivastelugu3565 6 лет назад

Excellent

@nagunooriroja4794 5 лет назад

Nice explanation

@sirir000 4 года назад

Good explanation dear

@sairamesh1394 6 лет назад

Ur general vedios r awesome...Really But what is d need of reactive power for transmitting voltage & y called imaginary power ? Plz plz prepare seminar on this?

@sathiyakumar9932 2 года назад

Thank you very much sir for amazing explanation. If possible can you make rolling sphere method for lightning protection as per IEEE998

@Freshkeys 6 лет назад

thank you👍

@bhagawanbhagat1721 2 года назад

Thank you sir for this ans

@SunilKumar-ow5gv 4 года назад

Well explanation sir I expected to explain atomic structure, and current why would take flow of electron butnot flow of proton and button.

@palyamprakash8906 5 лет назад

Usful channel For electrical students

@kamal0905231031 7 лет назад

Hello pisquare.... Ur video is very good and informative. I have one query. How pptc fuse r used in circuit and how its rating is decided for a circuit and if normal fuse and pptc fuse are used at same circuit weather it wiil be connected in series or parallel.

@thatharamesh1709 6 лет назад

Sir very nice please provide another basic concepts

@arslanahmad7000 7 лет назад

Very nice

@namarnath459 7 лет назад

thank u sir

@dailydoubts 6 лет назад

Amazing video & i want to know about one thing what is return supply???

@ganeshd480 7 лет назад

thank you sir

@vigneshkumar5634 5 лет назад

Put more video like this interview question s sir

@asifmunna5153 4 года назад

thanks sir

@yashpalsinghyadav626 6 лет назад

V nice

@himanshupal3439 7 лет назад

Sir kindly explain the problem of floating neutral

@qaz1234ism 7 лет назад

great job sir

@ThePiSquareAcademy 7 лет назад

Thank you Mr.Sankar, Subscribe to our channel for more updates

@sankarguha9205 4 года назад

Thanks

@electricalfunda123 6 лет назад

Nc video sir

@zainulkhan881 5 лет назад

Pls. Also make a video on how to choose proper rating of fuses to provide protection devices according to different voltage.

@sowndharrajanj7094 5 лет назад

Nice

@prasannapinjala3377 7 лет назад

yes sir very useful.from so many days i had this doubt now clarified by you.thanq sir pealse upload many more videos it helps to the every EE student. thanq for your interest put on the students like me

@ThePiSquareAcademy 7 лет назад

Thank you prasanna, stay tuned to our channel for more interesting and informative videos

@duppadaashok9785 6 лет назад

first thanq very much sir for such a wonderful videos.it is big help full for me.you should prepare more videos.

@sairammeka4603 6 лет назад

Super

@sathishdeva2786 7 лет назад

Your videos are superb... I'm confusing about DC vs AC... Can you please make a video about this...

@ThePiSquareAcademy 7 лет назад

Thank you Mr. Satish. Please watch this movie for the preliminary knowledge for your question ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ar2-UiTosIM.html

@arifaslam9879 2 года назад

Good

@bargehemant 3 года назад

Video is good I have one question that is how do you come to know which line is phase after standing below the transmission line

@vickyrdas 5 лет назад

Please made video for the following RMU QRM ,TRM how substations are mutually connected.

@lakshmangnanagari7580 7 лет назад

nice

@vijaymani6476 7 лет назад

Sir can you explain home,factorys, sub station eathing and lighting arrester ohm value and how do fix the ohm.

@amit19881000 6 лет назад

Can u explain directional over current relay in circuit for machines or motor

@mohamedkamil4224 7 лет назад

Hello sir, please explain Why neutral should be grounded

@pavanengineeringworld455 5 лет назад

sir iam design ac circuits may i using both phase and neutral fuses.like phase fuse current rating greater than the neutral fuse..

@satyarout9377 7 лет назад

thanks for cooperate

@syed_taha_ahmed 6 лет назад

kindly make the video on triac and conventional variable resistor fan controller and then compare their power wastage .

@rams2380 6 лет назад

lecture on concept of reactive power and active power

@chocchupatlasivanagaraju6162 6 лет назад

Sir, i have a doubt about the fault current. how the fault current flows without providing grounding to any pole either +ve one OR -ve one.. As like above video if any pole is grounded there is only voltage shift to another pole with reference to ground. There is no fault current untill both the poles are grounded.

@farzanals9701 4 года назад

Hai sir, can you please make the vedio lecture on frame leakage protection of busbars & carrier current protection of transmission lines(power system protection) as soon as possible sir. Thanking you sir.

@gajananadwe3350 6 лет назад

Sir please descibe the concept of loss of excitation in cylindrical and salient pole syn machine..

@chiragsingh2619 6 лет назад

Can you tell why transmission line rated in kv

@anandsanadi1674 5 лет назад

Dear sir pls explain how CBCT works and how detects the earth fault.

@mahendharyadavbaira6063 6 лет назад

Sir please make videos on power systems .{like corona,skin effect....}

@rajeshinti5773 5 лет назад

I have a small doubt.. The neutral is grounded at somewhere in the powersystem like at genearator and transformer. But my question is that why we will not neutral grounded at load side if we do like this we may reduce neutral conductor cost. Please give me answer.. Thank you...!!

@TonyStark-ih2wl 6 лет назад

Sir please tell us more about harmonics.....

@anilkumarreddy9522 7 лет назад

make in detailed working of induction motor video like dc machine please

@pankajpushpakar7351 7 лет назад

respected sir, in case of ac since we neutral terminal is grounded to earth, therefore when fault occurs in live wire then circuit is completed through earth and heavy fault current flows, and fuse will be blows off. but in case of dc there is no grounding then how can you say that ,if +ve or -ve terminal connected to ground then high fault current flows and fuse will blows. sorry but I m not completely agreed with this lecture. if I m wrong conceptually anywhere, then plz clearfy my doubt. thanks in advance. your all lectures are very useful to me.

@The_rock_star_1495 7 лет назад

I am assuming like this but i dont know true or not... In case of dc lets say some short circuit occured in some equipment or a dc motor which results in zero potential at that short circuit since a short circuit is obviously means 0v. hence even fault occur in positve line or negative line there is always potential difference from source to this sc point which results in heavy current flow as sc resistancce is very less. as this current has to come from source first fuse blows off. But in case of ac as neutral is always at zero potential there will be no current flow with reference to neutral so always fuse connected in live wire blows off.

@pankajpushpakar7351 7 лет назад

in case of dc ,if short circuit occurs, for dc short circuit means +ve terminal is directly connected to ground naa?? then what is the sense of fault occurs in +ve or - ve terminal , when both will in direct contact to each other then only it is called short circuit.

@The_rock_star_1495 7 лет назад

line to line fault is different from internal fault. equipment winding will never be ideal hence always some resistance exists and hence current depends on potential difference between two points

@akshayc4145 7 лет назад

May be true if the system has multiple dc voltage inputs for excitation and drive... Let me tell a practical case some audio amplifies need dual supply +-12v or some thing..normally gets from a ct transformer with bridge that case need two fuses at ...such as body is at 0v potential a fault may occur..

@anishpatel3970 6 лет назад

A hve one question.. if negative terminal has -20 vlg Nd negative line to ground fault occurred at negative line side then return current should flow from ground to negative terminal..?? Plz I m excited to know ??

@vairag9 6 лет назад

Sir.., In DC machine there are chance of zero potential ( sometimes) , do we need to use fuse ?

@vijaykumar-in4po 7 лет назад

Dear sir, Please explain how earth current flows in case earth fault in DC. for single earth fault there is no complete path for current.

@vijaykumar-in4po 7 лет назад

Please answer

@vamsikrishna5391 6 лет назад

Friend I think if the output DC is taken from a 3 phase star connected rectifier with neutral grounded then there will be a closed path for both negative n positive

@pvk0324 4 года назад

@@vamsikrishna5391 wrong concept

@user-tu7rh2hr1n 2 года назад

yeah same question ?

@praghu8896 6 лет назад

Sir, I would like to know why to bother to use a link on the neutral side when all it does is to have 0 potential. Can't we just use direct wiring for neutral ????

@failedengineer19 4 года назад

I think the 2 fuses only matters for a motor load which can turn either ways, but I think its ac which have to use 2 fuses where u can change the plug direction when we connect,and ac shock even if ur not touching neutral or earth cause body have something called parasitic capacitence..

@fiyesimaridabotuboharry2346 11 месяцев назад

For protection of DC circuit with mcb rather than fuses, which is more preferred is it to use single pole for positive and negative terminals or to use two pole mcb for simultaneous operation for a fault occuring at either sides. Thank you

@ThePiSquareAcademy 11 месяцев назад

For DC circuit MCB with two pole will be most preferred.

@sahadevanthalakatil4198 4 года назад

Can u give q&a on EHV trans lines.

@bommadapremkumar8018 3 года назад

Please fully explain about name plate details of transformer ,motor& alternator

@mohammedsaifullah6437 5 лет назад

Please make video on inverter duty transformer

@syedtanzeem9943 4 года назад

Please explain Construction and working principle of Bldc moter main fault

@chvishnuvardhanreddy3168 6 лет назад

Sir, Regarding the fuse in case of AC, At some point of time (i.e. in the negative cycle) The point which you have mentioned as "N" will be having some potential. Then we need another fuse in the N side also???

@Czapekdox3733 2 года назад

Nope you can imagine voltage fluctuating at the top node only

@mdmonazirkhalifa3997 6 лет назад

Please tell me what's the difference between the terms electricity and electric charge

@vydhik_devaraj 4 года назад

Sir but in AC the polarities of the terminals change after every half cycle. So it also requires 2 fuses?

@vijaykumar-tf5zr 7 лет назад

Hello sir, Suppose we have DC distribution in power substation and it is unearthed system in the above case will two fuses are required??? the distribution is single source DC only 110v DC . if system contains two types of DC supplies like 110v and 24 v double fuses are required but only one 110v DC is available and it is unearthed

@ThePiSquareAcademy 7 лет назад

Yes!! It is required even with just one 110V DC unearthed. I recommend you to go through the video once again, because from your question i could feel that you are missing some fundamental point in this regard.

@mohammedsaifullah6437 5 лет назад

If neutral is 0 potential in AC then leakage voltage won't effect on fault location?

@vaithiyanathanmanokaran449 6 лет назад

Dear sir I AM working in power plant. 11kv substation vcb rating is 11 kv, 2500A, 40KA. How to they calculate 40KA short circuit with stand current for 0.3 sec. Please explain

@karjun2795 5 лет назад

Sir when motor is not contact when the fault occur at neutral then why will use the second fuse

@Nagasai-ec5cg 5 лет назад

But in ac supply polarities will change instantaneously so I think the fuses will be kept on both sides of the induction motor

@37prashanttyagi84 5 лет назад

Hi can you please tell me why dc supply negative side have some potential power?????

@warlockinfinity1208 5 лет назад

Because it is ungrounded.p Practically a dc source has potential on both terminals.But in our textbooks simulation software we make them to be at zero potential(reference node) by grounding it for calculating parameters against that reference point that's y simulation software like ltspice won't give u output unless u ground it.This all are for sake of our calculation purpose as u can see a circuit functioning properly without a ground.hope u will get it

@ranadeeravirineni4523 3 года назад

🙏

@prajugoud6933 6 лет назад

Sir i have a doubt that if we create lower resistance path at home neutral than substation transformer ground(neutral wire to be connected), in that case closed path is created through our home neutral and Is there any possibility of flowing current in that wire after reaching several loads and return path through home neutral rather than going to sub station neutral

@ThePiSquareAcademy 6 лет назад

Check our other lectures and subscribe to get alerts on new uploads at ru-vid.comvideos?sub_confirmation=1 If you have any doubts on this topic, join live interactive session to have a direct interaction with Sekhar sir & get your doubt clarified. Check our fb page for more details facebook.com/bbs.pisquare/

@sairamesh1394 6 лет назад

Sir please prepare more seminars on reactive power