SGP418 Rotor Fault Protection of Alternator

Lectures on Switchgear & Protection By Dr. Tirupathiraju Kanumuri, Assistant Professor, NIT Delhi
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[@pagalavan7472]

Awesome explanation for rotor earth fault. Now only I understood its full concept
Thank u

[@sureshpadhy2243]

Sir, I have two doubts
1. Why in loss of excitation rotor speed increases ?
2. Why offset setting is given in loss of excitation relay ?
Please explain sir

[@IBTechnicalClasses]

i want to know sir, what is the purpose of isolation transformer and how it work.

[@addrarudra]

Sir how to identify whether exicter field winding or armature winding is good or not.
If either of the one is not good then alternator will be tripped on reverse reactance

[@roy6516]

Sir what happened to the damper winding during loss of excitation..why it doesn't keep the speed under check when rotor speed become more than synchronous speed

[@nallanagaraju1180]

Thank you for your lectures sir , they are very helpful in understanding concepts clearly.
My doubts are :
Why the rotor winding is not generally grounded?
What happens if we connect it to the ac ground?

[@nallanagaraju1180]

@@lecturesinelectricaleng sir , what will be the circumstances if we connect the dc field windings to Ac ground?

[@surya-pc7nx]

Sir why field failure characteristic of relay is covered 3&4th quadrent. As during field failure conditions Impedance comes in 4 th quadrent only.pls explain.

[@mrityunjoybhattacharjee8472]

Thank you.
Sir, please make a video for , I observed that 1500 rpm Generator (15 MW) has 4 pole but its exciter has 12 pole.

[@sandeepreddyvinjamuri6068]

Sir , what is the use of auxillary ac supply and isolation transformer?

[@muhammadsajjad1723]

Explained very well

[@surendrakverma555]

Very good lecture Sir. Thanks

[@chittichannel9442]

What is the purpose of bridge rectifier in the circuit

[@saiteja9940]

Sir incase of rotor winding opens what happens??

[@sudhakaravv9444]

Sir, why field is always excited with DC only? What happened if excited with AC??

[@mrityunjoybhattacharjee8472]

When conductors cut magnetic flux at 90° emf induced is maximum because of flux cutting is maximum due to the flux is DC flux (constant, not changeable.)That mean conductors will cut the flux must be a not changeable value .In case of AC , generated output voltage will not be sinusoidal because AC current flux always changeable.

[@aniketgangwar3867]

Sir what is the need of auxiliary supply?

[@aniketgangwar3867]

Sir at 7:10

[@IBTechnicalClasses]

excelent sir

[@ashishvitekar3474]

Rotor field wire connection to Relay , How it made

[@ramasamysubramanian3585]

Very nice

[@learnbyshiva725]

Thanks sir

[@padmeshpandey7869]

🧡🧡🧡🧡🙏🏻🙏🏻🙏🏻