StepDown Transformer forcing MCB to TRIP

Thread Starter

BluePhantom

Joined Nov 16, 2015
20
With the bulb in series with the primary winding, and no secondary load.

Measure the resistance of both primary connections to earth one at a time.
So.. If the bulb glows dim then I'm good to go right?
And if it glows bright or doesn't glow then primary is shorted?
 

MaxHeadRoom

Joined Jul 18, 2013
22,630
Should I keep the lamp connected whenever I use the transformer with load?
Once the lamp is glowing, have a means to short the lamp out and see if their is still a problem, the lamp trick just gets you past the inrush.
Remove the lamp when you operate the transformer with a load.
Max.
 

Thread Starter

BluePhantom

Joined Nov 16, 2015
20
I just tested the transformer with the lamp
the output voltage at secondary with lamp connected is around 2.3V, but its not even close to y goal i.e. 25V
I cannot describe the glow so I made a video and here is the link
if it says uploading.. then please try again in 15minutes
 
Last edited:

Thread Starter

BluePhantom

Joined Nov 16, 2015
20
sorry guys i was offline for a month as my internet connection was down ..
I have solved the problem by re-enameling the primary coil... it had a few marks on it which came when i was removing
the secondary and primary.

thank u all for such a wonderful help and telling me about the inrush current and controlling that current!
 
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