actully all three phase are connected each other internally, and we are applying DC voltage through insulation tester hense, not required to short. if you short all three phase than no problem..
Sir how do you decide at voltage transformer hv is to be tested. For example i have to test 1250kva, 11kv/433v transformer, how much testing voltage should i apply on LV side and hv side. My equipment can max generate 5kv testing voltage.
Sorry Sir... But u r wrong... When Star (LV) Side IR Value test time Nuetral Link open karna rahega to hi IR Value Test kar sakte hai otherwise Value 0 aayega....
Your explanation is simple and precise and very articulately defined. Keep it up. And thank you so much .
Too Good Explanation Sir
Excellent explain❤
Very nice video concept clear
please continue & complete the all series
And please make video in future design related videos
SUPER SIR JI
Good information 👍
Sir... HV me teno phase ko short krna hai ya nahi? IR testing me.
Very useful video
Thanks Sir 👍
Please make a video on short circuit calculation and relay protection and time gradation.
Sir in Star star winding TF connections are any bush to earth or star point to earth
Ten delta ct and transformer and pt ka vedio plese banao
Sir, when you connect red lead to Hv side, so we have to connect just one phase only or do we short all three hv phases and then connect red lead?
actully all three phase are connected each other internally, and we are applying DC voltage through insulation tester hense, not required to short. if you short all three phase than no problem..
HV to E k liye , HV k RYB ph Bushing short karna hai kya
technically it is not required, but for accurate result it is to be done.
Sir please explain What should be the minimum IR value for power transformers, motors, generators, breakers, CT
Sir how do you decide at voltage transformer hv is to be tested. For example i have to test 1250kva, 11kv/433v transformer, how much testing voltage should i apply on LV side and hv side. My equipment can max generate 5kv testing voltage.
for 433v, the insulation is design at 1100v, so it can be mesure at 1kv i.e 1000v,
for HV side- at 11kv you can mesure at 5KV
IR value minimum kitna hona chahiye for 11 kv transformer
Sir Star point is grounded and I don't understand why star winding terminal and ground shown gohm of resistance?
star point i.e neutral required to open at the time of testing...
@@Insighttecs oh Thank You sir
How did u calculate PI value ? Pls tell !
IR value at 10 minute divided by IR value at 1 minute
PI VALUE SHOULD BE HOW MUCH FOR VERY GOOD INSULATION ?
Ten delta test transformer video
Sir in Delta star TF LV to earth connection star point to earth
Or any LV bush to Earth
Pl explain
Please upload video with english subtitle
Why are u testing with 5kv?what is the concept behind choosing 5kv for this?
Ir value kitna hona chahiye
5kv for LV !!!
First veiwer
Sorry Sir... But u r wrong... When Star (LV) Side IR Value test time Nuetral Link open karna rahega to hi IR Value Test kar sakte hai otherwise Value 0 aayega....
of corce... you are right...
in star windig you need to open the nuetral from earth...
What is satisfaction value . To ensure equipment healthy .