How could I handle voltage above 600VAC?

To handle voltage that is over 600 VAC you would need a potential transformer (not supplied by Setra). For each voltage input to the meter (only one is available for 3 load model), there is a 'voltage scaler'. This is a multiplier of the incoming voltage to the meter.

For example - If you have a 2:1 stepdown transformer the user would enter 2 in the field for scaler. This will multiply the measured incoming voltage reading by two in all power/energy calculations. The value can be a floating point (non-integer) value up to a maximum of 1000 and minimum of 0.001.