The final important step is to demagnetizing a transformer to remove the residual magnetic flux. otherwise they they will be a large inrush currents on the primary side, that could trip the protective relays.
@@shahulexplore There are many insulation tests like tan delta, hipot, resitance of insulation, partial discharge etc. Hipot measures current leakage and Megger or insulation resistance measures de resistance of the insulation which is very high os supposed to be very hihg in hte Gigahoms and current leakage in in the mA.
All right, but what about safety? As it’s a high voltage test you should prepare proper PPE like certified rubber gloves and safety-hook, and buddy system.
The final important step is to demagnetizing a transformer to remove the residual magnetic flux. otherwise they they will be a large inrush currents on the primary side, that could trip the protective relays.
Hipot is a different test than Megger. Hipot measures leakage current and Megger measures insulation resistance.
But he did insulation test ; it means device he used is meggar ; I too little confuse ....
@@shahulexplore There are many insulation tests like tan delta, hipot, resitance of insulation, partial discharge etc. Hipot measures current leakage and Megger or insulation resistance measures de resistance of the insulation which is very high os supposed to be very hihg in hte Gigahoms and current leakage in in the mA.
Excellent demonstration.
Do I need to short circuit the busing terminals of each side together
Good work
All right, but what about safety? As it’s a high voltage test you should prepare proper PPE like certified rubber gloves and safety-hook, and buddy system.
Thanks ticher 👏អគុណ
What should be Megger voltage for 11000/415 volt distribution transformer
2500 V for HT-E & HT-LT
500 V for LT-E
Pls can you make this test on digital megger, so we will understand the exact value
Great Demonstration...
Should you not have disconnected all the line and neutral terminals of the transformer?
very nise I am from India 👌👌
Why only one phase is checking in primary and secondary. Usually we need yo check between each phase and earth.
Visakh pradeep edathil Look at the winding...if one of the bushing's insulation failed, the transformer is failed. for both primary and secondary.
@@imadewn thanks bro. @ site i saw people testing between all pahses and earth. Is that ok.
Visakh pradeep edathil no problem, but it waste of time i think haha
Please provide link of magger 🙏to purchase
How many time measure HV-GND , LV-GND , HV-LV....1 minute or 5min....plz details explain
Why is the guard tip of the meter empty?
Nice bro
what device did you use to shoot the video with?
Very good
Nice
is this in central java? the MV is 3-phase 4-wire?
Ridho yes it is
can u give pdf link of accptable value of resistance
1000 x volt
Right but short dtr possigen
👍👍
nice video
👍👌🙏🙏🙏
Aap acchi tarah se video nahin banaya clarity nahin hai aapka video sahi nahin hai
good video