ABB relays: REM= Relay for Electrical Machine (Motor or Generator) RET= Relay for Electrical Transformer REF=Relay for Electrical Feeder RED=Relay for Electrical Differential REL=Relay for Line (Distance Protection) Rex= basic protection NOC/NEF
Case 2 : As per your video ,Neutral Ct secondary current will choose low resistance path & it will make the relay trip . Same scenerio if we consider for case 1 How the neutral secondary current will flow in core balanced side since its a high impedence path . Please clarify sir..
I am shorting r phase with respective to earth for ref stability in primary method and how much current will flow in primary and secondary of transformer is there any calculation for that
6:24 what is reason for B phase Ct providing high impedence to flow of nutrel ct fault current?already B phase load current 1A flowing through B phase.then at the time of fault current cant to flow through B phase ct?kindly explain sir
In first case the fault current is able to travel the high impedance path whereas in second case it chooses low impedance path? Can you please explain the difference... Meaning the first case has 1 amp total fault current which chooses high impedance path whereas 0.5 amps chooses low impedance path... Pleassexplain
@@baranitech brother please explain below thing If we take angle for (1.5+1+1=0 .5) 1.5 sin 0° + 1 sin 240° + 1 sin 120°= 0 .5 sin 0° = 1.5 (0) + 1 sin (-3/2) + 1 sin (3/2) = 0.5(0) Then value wil come 0 - 0.866 + 0.866 = 0 Total value is 0 Please clarify my doubts sir
Pop up notes on display is obstructed the image of diagram. Due to which , I am not able to understand properly. So I request you sir to please avoid displaying the notes on display .
Much needed sir... Great explanation.. thank you sir
Always welcome
Good
Nice video sir.very informative and clear video.
Thanks and welcome
Very well explanation thanks Anna.
Well explained !
Please make video on SKE11 synch check relay, slip frequency test.
Keep it up...
Thanks sir such a good vedio
Very good. Thanks 🙏🙏🙏🙏🙏
you are welcome
Thank for it 👍🏻👍🏻👍🏻👍🏻
You're welcome 😊
I am waiting your next videos'
soon i am going to upload
Super job ana
ABB relays:
REM= Relay for Electrical Machine (Motor or Generator)
RET= Relay for Electrical Transformer
REF=Relay for Electrical Feeder
RED=Relay for Electrical Differential
REL=Relay for Line (Distance Protection)
Rex= basic protection NOC/NEF
REM is mainly used for motor and REG is mainly used for generator
Thank you sir
ஹாய் ப்ரோ சூப்பர்
most welcome
Case 2 : As per your video ,Neutral Ct secondary current will choose low resistance path & it will make the relay trip .
Same scenerio if we consider for case 1 How the neutral secondary current will flow in core balanced side since its a high impedence path .
Please clarify sir..
if flow of the current in same direction then it will have low resistance path.
Many thanks.
You are welcome!
I am shorting r phase with respective to earth for ref stability in primary method and how much current will flow in primary and secondary of transformer is there any calculation for that
please follow transformer stability primary injection
Sir is that REF protection and sensitive earth fault one and the same or what please
both are different
Sir please prepare a video regarding differential protection
Also about the motor protection testing on Micom P242
th-cam.com/video/xy-EvpOtyjo/w-d-xo.html
@@baranitech thank you sir
Pls understand for PT selection for double bus bar single breaker
Earth fault will not created
Please do a video on NGR
Surely I make video on NGR
Please do a video on NGR@Barani Tech
yes
in second case R phase current will be zero?
IF ITS FULLY SHORT THEN IT WILL BE ZERO, IF ITS HAVE RESITIVE LEAKAGE CURRENT THEN IT WILL TAKE LOAD CURRENT ALSO.
Good info : question - what will happen to REF if CT of faulty phase becomes saturated during through fault condition ?
before it get saturation relay has to give trip .
In saturated condition neutral secondary current shall flow through phase CT due to minimum impedence ...
6:24 what is reason for B phase Ct providing high impedence to flow of nutrel ct fault current?already B phase load current 1A flowing through B phase.then at the time of fault current cant to flow through B phase ct?kindly explain sir
it is the node of all three phase R, Y and B . not only for B phase CT
no current out form Core balance CT so neutral CT current not able to enter
What is core balance ct
sum of all phase
The subtitle is hiding,the picture, pl, check
in my present section i will not use subtitle sorry for this thank you.
In first case the fault current is able to travel the high impedance path whereas in second case it chooses low impedance path? Can you please explain the difference... Meaning the first case has 1 amp total fault current which chooses high impedance path whereas 0.5 amps chooses low impedance path... Pleassexplain
if the flow in same direction it can able to flow easily
What happens if no fault happened and load is unbalanced , will the relay trip
no it will not trip unbalance current and NCT current get balanced
But unbalance current will not pass through transformer neutral CT right?
Only fault current can pass through the neutral point CT
@@akhilsm6840 without help of neutral line the star connection cann't able to take unbalance current
U meant to say then total 5 CT will be required for 3 phase 4 wire system am I right sir
hello please what software tool do you use for drawing these schemes
only ppt
hi , how to calculate in current for ex: I1+I2+I3=0 (1.5+1+1= 0.5) explain plz
i1
Convert from polar to rectangular form, that way it'll be easier to understand.
@@baranitech brother please explain below thing
If we take angle for (1.5+1+1=0
.5)
1.5 sin 0° + 1 sin 240° + 1 sin 120°= 0
.5 sin 0°
= 1.5 (0) + 1 sin (-3/2) + 1 sin (3/2) = 0.5(0)
Then value wil come
0 - 0.866 + 0.866 = 0
Total value is 0
Please clarify my doubts sir
Case1 current flow of neutral current is showing incorrect in flowing red dot animation.
according to P1 and P2 the current flow on CT secondary. Thank you.
Hindi
Pop up notes on display is obstructed the image of diagram. Due to which , I am not able to understand properly. So I request you sir to please avoid displaying the notes on display .
okay i will avoid
Don't hide all by subtitles
i try to reduce subtitle sizes small