Transformer Open Circuit Test

A brief description of core losses in a transformer and the rationale behind testing core losses.

[hadireg]

Great quality video sir! 👍👍 keep it up. your videos will reach the world soon!

[varkush]

maybe a low pass filter will help with the squeaky noise

[aodhmacraynall]

Holy crap, why havent I been watching your videos?

[romarssieverything]

Thanks, clear and concise, just what I wanted.

[zncssa]

How the applied voltage will affect the core loss? For example, if applied voltage is 240V, watt meter read P=100W. When applied voltage change to 2400V, Core loss change to 1000W?

[studymission]

Test them by opening the hv side to reduce metering size and supply voltage

[_s_l]

is there a considerable current flowing through the primary while secondary is open?

[erniepelley]

Awesome videos. Very helpful!
Have you uploaded a video on short circuit test for transformers? I can not seem to find one.

[yashchauhan]

great video ....ty i have a test tomorrow and it helped a

[falconhawker]

In the simple explanation given ; core losses are measured by current and voltage BUT total current is includes the lossless current of te primary inducrance ...perhaps in more deailed accounts this error will be corrected.

[xiRADIOACTIVEix]

Hi, do you know if you are able to conduct the open circuit test onto a current transformer? I have seen a lot of warnings about open-circuiting the secondary winding of a current transformer. However, if you are not able to open circuit the secondary windings of a CT, then how would you calculate/measure the transformer core losses/equivalent parameters?

[muhammadatifsafdar]

Instead of focusing on the explanation he provided, I have been shockingly surprised by how he was writing. Was he behind a glass board with a camera in front of him? If so, how on the earth was he able to write from the back side? Did he train himself to write in mirrored fonts??

[vellyyt]

Hi Sir. Can you show us what is corner grounded 3phase system?

[blueberet]

It definitely helped, from a simulation perspective (software) I can energize either the LV or HV winding to measure the core loss correct? The reason I am asking this question is because in the EMTP-RV software the Magnetization Branch is located in Winding 1, so would that suggest that the excitation needs to be applied on Winding 1?

[tarunramlal]

U are amazing... thanks for these videos

[energytech]

Great Man U are
So thanks from Algeria

[hardikpatel]

How did you make this video ??
With any software or it's skill ??

[paterson]

Sorry, lost concentration the second you started writing. Am i missing something or are you legendary at writing mirrored perfectly?

[antigen]

LOL - you don't need to go through all that - just use an ohmmeter. if it's open it will measure high resistance. prove me wrong.

[Predatorseeker]

What would cause a voltage increase on a primary? We are having our 25k transformers 37.5k surge arrestor firing constantly. Spikes of 50kV and 500+amps