Question:
Must we allow for 3 channels per 3-phase meter?

Answer:
In most cases we allow only for 2 channels for three phase meters (active and reactive energy).
some three phase meters in rare cases may use 3 channels (leading reactive) or 4 channels (4 quadrant metering, including reverse energy)



It depends what we read backsome three phase meters in rare cases may use 3 channels (leading reactive) or 4 channels (4 quadrant metering, including reverse energy)


It depends what we read back.
If PnPScada read's too many channels for your budget, you can blank them out in Advanced Meter Settings