sir actually student like me tired of searching for gd lecturer like you..in youtube and other platforms..very much thankful to u sir for taking a gd step to share knowledge..for free of cost..tq sir
If we are using IT system for some critical load to get continues supply (E.g. in hospitals & railways), how we can protect the circuit in isolated neutral system. IMD/MCB/RCCB/SPD can protect the same?
I got two questions sir. 1. if one line is connected to ground on the case of ungrounded system, does it automatically mean a three phase fault occurs? because the current flowing came from the two other lines as you show on the lecture sir. 2. And if you said current flows from the other two lines, should we see it in actual that the arcing ground in action is connected to all the lines and not only with one line to ground? Does the diagram you show us here represent one line with flash over to ground? I hope you'll give us clarification on these sir :D
Sir if the faulted line is at zero faults. Why capacitor voltage is voltage between healthy phase and faulted phases equal to root 3 times phase voltage. If faulted phase is B and its at zero volts, then VRB = VR - VB = VR - 0 = VRN. So why capacitor voltage is now line voltage if faulted phase is zero volt?
sir, during this L-G fault as there is no fault impedance and b phase is connected to ground, B phase also zero, then how can voltage across across ground capacitance will be line voltage during fault.
@@lecturesinelectricaleng even in neutral grounded system I think voltage is not going to be zero as emf is continuously generated by alternator supposing the above windings are of alternator. Correct me if I am wrong.
Sir, at the time of arcing ground current in faulty phase instantaneous current in the form of arc naturally getting zero so the energy stored in inductor is getting zero. Why this energy of 2 IC getting transferred to capacitance. after the arc getting extinguished naturally normal ic from that natural zero of 3 ic will be fed to capacitor through the inductor.
Sir if arc gets extinguished other than natural zero of instantaneous current of 3 IC waveform than at that instant energy of inductor gets transferred to capacitor. Since the only path the current through the inductor ( current through cannot be zero suddenly) can pass is through capacitor. If the arc got extinguished at natural zero. current through the inductor is already zero ( energy in inductor = zero) why will it transfer energy to capacitor. Sir, my doubt is this.
Sir I understood all other concepts that u taught in this lecture like how line to line voltages appear in other two phases other than faulty phase, capacitive current increases compared to normal capacitive current, arc formation. except the point I asked u in previous comment.
Lectures in Electrical Engineering Sir if arc gets extinguished other than natural zero of instantaneous current of 3 IC waveform than at that instant energy of inductor gets transferred to capacitor. Since the only path the current through the inductor ( current through cannot be zero suddenly) can pass is through capacitor. If the arc got extinguished at natural zero. current through the inductor is already zero ( energy in inductor = zero) why will it transfer energy to capacitor. Sir, my doubt is this.
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sir actually student like me tired of searching for gd lecturer like you..in youtube and other platforms..very much thankful to u sir for taking a gd step to share knowledge..for free of cost..tq sir
Super sir.Understood after a long search
Thanks a lot sir
I read in book but I din't understand but with your lecture concept got clear
Excellent explanation. Sir I appreciate your knowledge and teaching skill.
Sir what happens if double lines gets grounded in ungrounded system, will there be arcing ground happens or not if yes the how
Wounderful explanation sir !
Excellent. Thanks 🙏🙏🙏🙏🙏
Excellent explanation Sir👌
It is really helpful sir. Please don't quite making vedios. My best wishes for you
Very good explanation sir
Very good explanation Sir. Thank you.
Sir, your explanation is excellent
why inductive current does not cause arcing ground?
If we are using IT system for some critical load to get continues supply (E.g. in hospitals & railways), how we can protect the circuit in isolated neutral system. IMD/MCB/RCCB/SPD can protect the same?
sir, what about fault current feed by generator? if any fault happened in transmission lines generator also need to supply fault current right.
good explanation 👍👍
I got two questions sir.
1. if one line is connected to ground on the case of ungrounded system, does it automatically mean a three phase fault occurs? because the current flowing came from the two other lines as you show on the lecture sir.
2. And if you said current flows from the other two lines, should we see it in actual that the arcing ground in action is connected to all the lines and not only with one line to ground? Does the diagram you show us here represent one line with flash over to ground?
I hope you'll give us clarification on these sir :D
very clear explanation sir. Thanks a lot sir.
Sir if the faulted line is at zero faults. Why capacitor voltage is voltage between healthy phase and faulted phases equal to root 3 times phase voltage. If faulted phase is B and its at zero volts, then VRB = VR - VB = VR - 0 = VRN. So why capacitor voltage is now line voltage if faulted phase is zero volt?
@@lecturesinelectricaleng Thanks i understood it. I was mistakenly taking phase voltage as line to ground voltage.
Sir. it is awesome & excellent
sir, during this L-G fault as there is no fault impedance and b phase is connected to ground, B phase also zero, then how can voltage across across ground capacitance will be line voltage during fault.
Sir
How capacitive current creates arching ground??
Since 90 phase shift between voltage and current, When current waveform reaches zero, instantaneous voltage will be maximum so arc restrikes
Very Good Lecture
Sir can you please upload more numericals for 3-zone protection by Distance Relays ?
Check NPTEL courses
Sir in b phase voltage is zero then how voltage across the capacitor will be equal to line voltage
@@lecturesinelectricaleng even in neutral grounded system I think voltage is not going to be zero as emf is continuously generated by alternator supposing the above windings are of alternator. Correct me if I am wrong.
Sir, at the time of arcing ground current in faulty phase instantaneous current in the form of arc naturally getting zero so the energy stored in inductor is getting zero. Why this energy of 2 IC getting transferred to capacitance. after the arc getting extinguished naturally normal ic from that natural zero of 3 ic will be fed to capacitor through the inductor.
from 13:15 sir
Sir if arc gets extinguished other than natural zero of instantaneous current of 3 IC waveform than at that instant energy of inductor gets transferred to capacitor. Since the only path the current through the inductor ( current through cannot be zero suddenly) can pass is through capacitor. If the arc got extinguished at natural zero. current through the inductor is already zero ( energy in inductor = zero) why will it transfer energy to capacitor. Sir, my doubt is this.
Sir I understood all other concepts that u taught in this lecture like how line to line voltages appear in other two phases other than faulty phase, capacitive current increases compared to normal capacitive current, arc formation. except the point I asked u in previous comment.
Lectures in Electrical Engineering Sir if arc gets extinguished other than natural zero of instantaneous current of 3 IC waveform than at that instant energy of inductor gets transferred to capacitor. Since the only path the current through the inductor ( current through cannot be zero suddenly) can pass is through capacitor. If the arc got extinguished at natural zero. current through the inductor is already zero ( energy in inductor = zero) why will it transfer energy to capacitor. Sir, my doubt is this.
Wow sir... Thank you...
superb sir
Thank you sir
Best teching sir
very very thank you..
Thanku sir😊🙏
Thanks u sir
Thank u sir