High School transformer

Because the secondary power is by the primary power conversion in the past, so how much power the secondary, primary to how much power
Like a tug of war, the other with more vigorously, you do not want to be away, but also with how much force to
You did not analyze the reasons for the transformer burned, is   the primary or secondary fire, which coils? If that is caused by high voltage transformer overheating, then you can setwire cable baskets, metal cable trays
Share of non-target, such as 400/200, and the low voltage transformer will be no major cases of failure, although this time the voltage  switching power supply may be low, but the ability to adapt to non-switching power supply
So you often strong side to improve power supply voltage rating. The most important thing is you have to analyze the reasons for the transformer burned. Burned when the first should determine the reasons for its failure.