Multi voltage transformer , it was set up for 230v , they hooked up 460v , is it safe to say it is fried ?
blew the 24v fuse coming out , 12v is reading 1.6v , need to get (3A)fuse to check 24v now.

 

The blown fuse probably saved the transformer but if the load has transistors or ICs then one or more might be fried.

 

If there was no fuse on the input, then it is possible the input winding is fused open.

 

Rarely does the primary fail immediately, other signs would be present , OVERheating!
Test the transformer off load and check the secondary voltage.

 

How large of a transformer? Transformers, especially large transformers can be Brutes Applying a high input voltage over a short period they generally get hot but survive. Apply the correct 230 VAC using any correct taps or terminals with an unloaded secondary and see what you have.


Ron

 

Agree with the comments above. Transformers (wire wrapped around a magentic core) are pretty rugged and can take a lot of abuse. Go ahead and check out the transformer with the right voltage on the primary, probably nothing to worry about.