Restricted Earth Fault Protection working | REF relay working principle | REF relay working Part-1 

Much needed sir... Great explanation.. thank you sir

Very well explanation thanks Anna.

Well explained !

Nice video sir.very informative and clear video.

Thanks sir such a good vedio

Good

Super job ana

Please make video on SKE11 synch check relay, slip frequency test. Keep it up...

Very good. Thanks 🙏🙏🙏🙏🙏

Thank you sir

Many thanks.

Thank for it 👍🏻👍🏻👍🏻👍🏻

I am waiting your next videos'

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

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

Sir is that REF protection and sensitive earth fault one and the same or what please

ஹாய் ப்ரோ சூப்பர்

Pls understand for PT selection for double bus bar single breaker

Please do a video on NGR@Barani Tech

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

Sir please prepare a video regarding differential protection

Please do a video on NGR

in second case R phase current will be zero?

hello please what software tool do you use for drawing these schemes

Good info : question - what will happen to REF if CT of faulty phase becomes saturated during through fault condition ?

Case1 current flow of neutral current is showing incorrect in flowing red dot animation.

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

hi , how to calculate in current for ex: I1+I2+I3=0 (1.5+1+1= 0.5) explain plz

What is core balance ct

What happens if no fault happened and load is unbalanced , will the relay trip

Can you do a case study: when one phase is fully loaded, other two half loaded, EF in one winding & same current passes through N CT as in fully loaded phase but half of this passes through other two phases?? Thanks in advance

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..

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 .

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