SGP413 Modified Differential Protection of Alternators

Lectures on Switchgear & Protection By Dr. Tirupathiraju Kanumuri, Assistant Professor, NIT Delhi
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[@prashanthramagiri9372]

*Sir if ct characteristics are different then difference in current between two secondaries of two CTS will flow through the earth fault relay as *it is 20% setting is the relay operates.
*If operates what is the use of earth fault realy please reply sir.

[@surajpanda6209]

I think that's why we use balancing resistor.....For limit spill current

[@sabashaikh2418]

For R phase to ground fault, only earth fault relay will operate, so which CB will operate? Only of R phase or any other? @ 9.00 minutes

[@sourabhpandey7940]

Sir ,are positive and negative sequence current both responsible for operating of phase fault relay or only positive sequence is necessary for operation??

[@jamesowusu-ansah595]

sir please, I didn't really get the explanation you gave for the reason why the earth fault is made to protect up to 85% of the winding...can you please explain that?

[@surendrakverma555]

Very good 🙏🙏🙏🙏. Thanks 🙏🙏🙏

[@adharshcharvak4587]

Sir but there is no much upgradation in protection na from normal differential protection ? Why that BR is introduced i didnt get properly ? Ill join your video chat session on 28-03-2021
please explain me

[@SAFAYETAHMED-hd9yu]

Sir , could you please explain what happens when LLL and LLG fault occurs.

[@sourabhpandey7940]

Sir i didn't get how it overcome the limitation of expternal through fault against normal differtial scheme??

[@rameshdasappa9627]

Sir, please do lectures on power systems stability as early as possible. Thank you sir

[@abhijeetpal4046]

I have a doubt. Sir why only positive & negative sequence currents flows in line to line fault??

[@amitparmar5820]

Sir.. Which kind of faults occurs for 3.5 kva rating in 3 phase alternator

[@prashantagrawal2352]

what is the function of balancing resistor in that?

[@rubultalukdar3861]

Sir, could you make a video on Neutral Isolating Contactor or Neutral Contactor????

[@aemeroayalsew2041]

thank you great lecture let me subscribe you!

[@sudhakaravv9444]

If phase to ground fault occurs in second phase. Then what will happened sir. Because there is no operating coil in the second phase.

[@sudhakaravv9444]

Thank you very much Raju sir

[@vinayvvk8047]

Sir what is mal operate

[@Mriduljatin999]

very nice.

[@himanshu2232]

Thank u sir

[@abhishekmahapatra352]

Conclusion from 11:37