choosing a sensor for voltmeter..

[[email protected]]

hey
can anyone suggest me a sensor for my voltmeter project...
Its input voltage is 33kv with 100v resolution , I m using the microcontroller with inbuilt adc and this microcontroller does not requires a separate pt, but i want to convert the input voltage i.e. 33 kv to 110 VAC ....
can i use a step down transformer or kinda thing....???

 

[Resqueline]

33kV; AC or DC?
If AC; what frequency?
If DC you can buy ready-made HV probes for DMM's. They contain resistors, and together with the intended 10M ohm load resistor they divide by 1000.

 

[[email protected]]

Its an AC Voltmeter,with freq 50 Hz

 

[Resqueline]

Ok. Just Google for [HV probe] and see what you find out. I figure they work at 50Hz too. A 33kV transformer would be harder to find I guess, + big & expensive.