Hi Ravinder,

I have read the other replies that advise to check the voltage and frequency
rating of the microwave's power supply.  They also warn of the effects of
changing power frequencies.    All good advice.

I have another concern to add.  

Remember the recent thread about single phase, split phase, two phase, three
phase ...?

Make sure that you know what "phase" or "polarity" of AC voltage your
microwave was designed for.

I don't want to give any more particular instructions since I don't know
exactly what type of transformer you're using ...  For me to recommend an
actual wiring diagram without more facts would be foolish. (even by my
standards, which are pretty low)  

All that I can say is use caution and make sure that you keep track of
exactly which wires are floating and which wires are grounded. 

Some 120VAC devices don't care about polarity.  However, some do!!!   The
microwave's designers may have made certain assumptions regarding the
polarity of input voltage.  Violating these assumptions could lead to an
unsafe condition or an overstress on certain components in the microwave's
power supply.

I would be glad to correspond furthur (offline) about particulars.

Best regards,

Chris




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