The voltage burden requirements of a modern wide voltage range solid state meter are very low. For example, with a Form 9S three phase wide voltage range meter, the power supply phase is usually less than 7.5 VA when supplied with voltages from 100-240 volts as is the case when it is connected with VTs. The other two phases are essentially open circuits with burdens of <.02 VA, worst case. Unless you are trying to extend the leads many hundreds of feet, the voltage drop, and the accompanying measurement error, can usually be ignored. If you would like to see an error analysis, please contact us for that information.