transformer symbols

[Dr.EM]

Can anyone tell me what these symbols mean (from a transformer and power pack). I can't exactly google them so any help appreciated

 

[Hero999]

I'm not certain but as I can offer a couple of guesses.

Double insulated?

Isolation transformer?

 

[eng1]

Can anyone tell me what these symbols mean (from a transformer and power pack). I can't exactly google them so any help appreciated

Two symbols have been combined into a composite symbol: safety isolating transformer + short circuit proof transformer.