bring your primary up to 26-28 now.
Transformer wattage is very much driven by the ability to cool the thing. In a closed box and sealed, that tranny was good for 3kw all day as a grid tie. That will still hold.
Keeping the magnetising current down will help keep temp down too, as eddy currents will be lower, core temp from magnetising the steel to lower testla will help also.
Making the thing 260v is what helped this... pushing the magnetising current down, ie.... the idle current.
6kw would be comfortable for shorter runs if the primary is large.... 50mm sq etc.
Transformer cores don't saturate from over current if they are not saturated at idle any way......contrary to popular belief.... only voltage and frequency can do that, so the R in the circuit will dictate the upper limits..... All the extra current in an overload goes into inducing current into the secondary... ie between the coils themselves, not saturating the core...the core field remains the same .... like in a motor where all the extra current finds it's way into driving the load, not saturating the core.... any heat build up then is due to Isq x R loses in the wire.
.................oztules
