transformer replacement

[tatty]

hi
i have a peice of small test equipment that has a small 110v transformer in it i want to change it for a 240v transformer
i know the old tx has a 15v ov 15v secondry and it looks the same size physically as a 1 amp 240v transformer i have
what i want to know is i beleive i will need to change the fuse value (in the primary) what should i change it to? and is the physical size a guide as to what ampage it is
Does the size of the 110v being the size of the 240v 1A mean they are both 1 amp if you understand what im getting at here
as there are no markings at all on the old 110v tx

thanks

stevep

[sarma]

Hi Stevep,
Perhaps fuse change can't serve your need. If the fuse is blown by accidnetally plugging into 230V, check whether the primary windings are OK. I really don't know where you are from.

If in Europe, generally these transformers are made for 120/240 both.
if used for 120V, the windings would be arranged in parallel in phase.

the same one , if to be used for 230, they would be connected in series aiding( end of one winding connected to start of the second.

Please check whether your transformer has any such facility.
if not , i suggest to change the one by a 230V transformer. You may mount it and hand wire the connections, as per need.

Sarma

[boolf]

Stevep,
If you have no other indication, and couldn't get hold of the circuit diagram on the net, then yes Size can be a reasonable guide, and if you have the extra space then go slightly bigger just to be on the safe side.

[thanx]

Hi Stevep,
Perhaps fuse change can't serve your need. If the fuse is blown by accidnetally plugging into 230V, check whether the primary windings are OK. I really don't know where you are from.