This post has been transcribed from a support call
Please help, we have started putting in 4 wire connections, but with VT connections on all phases, and this being secondary metering the VT and CT ratios are not programmed into the meter.
Now what happens, is that PNPSCADA keeps on invalidating all those meters! It says it gets 67 V, which is too low. Please help.

Ok, lets look at what normally happens. The default setting for a directly connected meter is a VT of 400/400.
So, to compensate, we divide that by the square root of 3, coming to about 230.94 V. That is effectively what we normally compare the voltages to, for a 4 wire connection, to decide whether it is too low or too high.
Now in this case, you are using VT connections, which means that the input voltage is 110 V. For example VTs are normally 11000/110, or something similar.
Therefore, since you don't know your actual primary value of your VT (secondary metering vs primary metering); but you know you've got a VT, please change the VT ratio to 110 / 110.
What this will do, is make the actual thing the voltage gets compared to 110 V divided by the square root of 3, being about 63.5 V.
The normal tolerances are essentially 15 %, which is in this case about 9? So at 67V is still less than 72.5 V, so within tolerances.