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Old 21st Jul 2021, 8:20 pm   #12
Herald1360's Avatar
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,131
Default Re: What is a reasonable magnetising current for a mains transformer?

If the TX were run from 60Hz, the mag current would drop to less than 60mA, even further if there is still some saturation occurring on peaks at 50Hz.

Looking at the primary current waveform with a 'scope can be very revealing. There should be very little if any trace of "pips" on the top of the sinewave at the nominal supply condition.
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