Transformers

When you get these industrial diverse power supplies with 400v,230v and 110v sockets on them and there is say a 4kV transformer inside them how are the cables coming out from the transformer connected has to get 230v are the cables connected to the L1 and L3 connections of the transformer in order to get 230v and L3 and Neutral connections of the output of the transformer in order to get 110v and then I assume these cables from the transformer are connected to say a 32A MCB in order to connect to the respective sockets. What is the configuration within the transformer to produce 400v considering that there are 5 power cables each for the L1,L2,L3,N & E that are inputted into the transformer.Quite new to transformers so was after some examples and ideas of the workings of them and what they create in respect of the different line voltages?.Jimmy2Rivers