Is it possible to safely turn on LATR by swapping the input and output?

Question

Software testing

To test the equipment, it is necessary to briefly (for 5-10 minutes) apply an increased voltage of 270-280 volts to the input.
Of the available funds, only LATR is at hand.
Question: if you carefully swap the input and output, will LATR burn out?

Answer 1

Can. If carefully.