120 volts to 220 volt conversion

Just for clarification - are you saying that this thing gives up to about 50 amps at 24Vdc?

not exacly 50 amp but around 30 amps.

To get back to your original questions(s) -

"1. using a simple transformer instead of a cvt transformer is it safe and advisable?"

This set-up is certainly safe, if the Safety circuits are correctly designed and built. Safety-rated monitoring relays, timers etc. will shut themselves down to a safe state if their input voltage is out of spec.

Unless your mains input voltage is all over the place, or you have very sensitive kit on the DC side (in which case you'd be better to supply them from a regulated PSU), I can't foresee any problems, so: advisable? - I'd have no trouble advising it.

But beware! I'm just some bloke on the internet, who may not know his arse from his elbow. That's the problem with the internet!

Hi Amatuer,

Becareful of the frequency because going from 60hz to 50hz could cause the internal components of the power supply and cvt to over heat.

sir,

cvt overheating ;; we are already changing that to 220v 50hz, other ineternal components are already of 50/60hz.

my issue is that is there any way to know if original transformer is of 50 or 60hz. there is no mention of that on xfrmr. but capacitor makes a mention of 440vac/60hz.

or can we change the capacitor value which is 10mf to any other value and will there be any difference?

The only way to be sure is to contact the original transformer manufacture. I will say it cost more money to build a 50/60hz transformer vs. a 60hz only transformer. Most US transformer models are 60hz only unless they are intended for international use. The heat that comes off a 60hz transformer when run at 50hz is considerably higher than 60hz and will damage the transformer in time. CVT by their design actual puts off even more heat especially at low loading. It is a difficult problem if there are no markings on the transformer to trace back.

even i think that it is 120volts/ 60hz transformer only.

as i tried it for around 2 hrs on full load and it was heating till 68degrees centi.

and was giving all kind of errors and alarms where as simply by replacing the main transformer by 50hz everything was normal.

To run a 60hz transformer at 50hz, the input voltage must be reduced by a factor of 5/6 and the kva capacity must also be reduced by the same factor. The problem is when the input voltage is reduce the output voltage also is reduced by the same factor. The CVT will have a caps so I do not know how the output voltage will be effected but I believe it will be lower than it should be.