Sir,nice explanation thanks for good efforts , here i wound like to ask ,what is the relation with isolation earthing and solid earthing and compensate earthing with direction RCA/MTC ANGLE SETTINGS ..HOW TO CORRELATE WITH EARTHING SYSTEM Vs diectional MTA/RCA .
Sir, if direction unit is not pick up causes the open ckt of secondary wdg of O/C relay unit .... Is it saturate the core of O/C relay as in the case of CT if not then why ?
Sir power relay is not used for short circuit faults .we use directional over current relay for short circuit fault voltage is completely zero but how come flux is produced with low voltage in directional element please reply for this sir....what is the use of stopper I read two text books but no where it is written about stopper for opposite rotation
Sir , in case of short circuit fault voltage drops to zero value then how this directional element produces torque in absence of one out of two fluxes??
Every thing clear until 18:30 sir But which is theta and phi remain confusing. Seems to be misplaced. Kindly tell me about theta and phi with respect to vector representation (is vector representation is correct) Edit: concept clear after seeing next video
so please for the directional overcurrent relays, once there is an overcurrent but the current flows in the desired direction, then the relay won't operate.. It only operates for overcurrent in the undesired direction...True?
Sir the trip contact of the directional element (here x,y) is in series with the current coil of the over current element, again the current coil of the directional element is in series with the overcurrent element , so the current coil of directional element & the subsequent overcurrent element remain open circuited ( via x,y) , so how come current is flowing through the current coil of the directional element at the first place as current can only flow in close path & how come x,y is getting closed as the disc will rotate only when there will be flux interaction (but we won't get any flux until there is current in current coil of directional element)??
@@lecturesinelectricaleng sir I'm taking about the working procedure ( can't be pinpointed at certain time line) ,here first x-y of the directional element is closed which led to the operation of overcurrent element , but my question is, if x-y remain opened at first then how come current is flowing through the current coil of directional element ?
This is the best channel on youtube providing free lectures, Thank you sir.
Even I liked it very much. Explanation is perfect. I always prefer to watch Sir video if I have any doubts. From(U.S).
Thanks sir. You saved me. Your lecture is amazing and easy to understand
mention not
Sir,
18:46 time you used teeta and Phi angles wrongly
Sir,nice explanation thanks for good efforts , here i wound like to ask ,what is the relation with isolation earthing and solid earthing and compensate earthing with direction RCA/MTC ANGLE SETTINGS ..HOW TO CORRELATE WITH EARTHING SYSTEM Vs diectional MTA/RCA .
Sir is differential relay operates on symmetrical fault as the cuurent entering and leaving is equal in all phases.
Sir, if direction unit is not pick up causes the open ckt of secondary wdg of O/C relay unit .... Is it saturate the core of O/C relay as in the case of CT if not then why ?
Sir, thanks for these great lectures...
Where did you explain the purpose of directional oc relay?
Sir what is the role of voltage element for directional feature in relaying system?
Very clear explanation sir. Thank you
Sir power relay is not used for short circuit faults .we use directional over current relay for short circuit fault voltage is completely zero but how come flux is produced with low voltage in directional element please reply for this sir....what is the use of stopper I read two text books but no where it is written about stopper for opposite rotation
Sir , in case of short circuit fault voltage drops to zero value then how this directional element produces torque in absence of one out of two fluxes??
Every thing clear until 18:30 sir
But which is theta and phi remain confusing. Seems to be misplaced. Kindly tell me about theta and phi with respect to vector representation (is vector representation is correct)
Edit: concept clear after seeing next video
Sir, At the video time line 18.20 you are indicating teeta instead of pi (I feel), could you please confirm.
Until the directional element work non directional element does not work then what is the use of non directional element.
so please for the directional overcurrent relays, once there is an overcurrent but the current flows in the desired direction, then the relay won't operate.. It only operates for overcurrent in the undesired direction...True?
Sir the trip contact of the directional element (here x,y) is in series with the current coil of the over current element, again the current coil of the directional element is in series with the overcurrent element , so the current coil of directional element & the subsequent overcurrent element remain open circuited ( via x,y) , so how come current is flowing through the current coil of the directional element at the first place as current can only flow in close path & how come x,y is getting closed as the disc will rotate only when there will be flux interaction (but we won't get any flux until there is current in current coil of directional element)??
@@lecturesinelectricaleng sir I'm taking about the working procedure ( can't be pinpointed at certain time line) ,here first x-y of the directional element is closed which led to the operation of overcurrent element , but my question is, if x-y remain opened at first then how come current is flowing through the current coil of directional element ?
Superb sir!..one question...in numerical relays how MTA is used?
Great sir, Thank you so much.
Sir please finish total power systems topics as early as possible
Very good lecture.
That was an awesome explanation sir. Sir will you be starting a video lecture on load flow analysis
Thank you sir for this quick reply
Superb sir 👌👌
Great vedio sir