For a 2VA or less step-down transformer from primary mains voltage to say 12V secondary, if the transformer datasheet specifies a mains voltage of 230V, does it mean then that it can operate btw 200-250V AC? If it specifies 115V, does it mean it can operate btw 100-125V AC?
For a 2VA or less step-down transformer from primary mains voltage to say 12V secondary, if the transformer datasheet specifies a mains voltage of 230V, does it mean then that it can operate btw 200-250V AC? If it specifies 115V, does it mean it can operate btw 100-125V AC?
hi,
You can use a 230V rated transformer on 200V thru 250V, but the output voltage will change as the transformer ratio.
So 230/12 = 19.17, say 19:1
So 200V/19 =10.5V and so on..
250/19 = 13.15V
Likewise for the 115V transformer.
The other point is the VA rating.
Say the 12V at 2A = 24VA, then for the highest voltage of 250V the output current [ to stay within spec] would be 24VA/13.15 = 1.8A