In case that the VT ratio is（440/√3）/（110/√3）, how should we set VT ratio
440/√3=254.034 →　254 110/√3=63.50　→　64 Should we input like 254 : 64? Or is it ok to input 254034 : 63500
is it ok to input 254034 : 63500 in case that the actualVT ratio is（440/√3）/（110/√3）

Please help by giving an example how to select VT ratio of energy meter

 

It is just a ratio to multiply the secondary voltage of the VT so the the energy meter can calculate the primary voltage of the VT. Keep it simple, 440:110 or 4:1

 

It is just a ratio to multiply the secondary voltage of the VT so the the energy meter can calculate the primary voltage of the VT. Keep it simple, 440:110 or 4:1

Sorry to disturb you .

Can you give me an example how it works and on what basis we select VT .

 

The secondary voltage of the VT should be low enough to be within the input limits of the energy meter, sometimes VTs are not required if the mains voltage is low enough. You also need to specify the accuracy class which all depends on what you are using the energy meter for, tariff, reference or general.