Bootom right hand transformer is to convert incoming power to 110VAC for relays, contactors, etc.
Big transformer up top is T2 used to make power for axis drives. Above that is the spindle motor forward/reverse contactors and the associated overload.
Those last 3 devices that look like transformers are saturable core reactors used in conjunction with the ACC board for current control of the axis.
George
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)