[Nut-upsuser] Interpreting data from 220V input APC UPS

[John Ackermann N8UR]

Hi --

I am monitoring via the SNMP driver an APC SmartUPS that has split phase 
(2L + neutral)  240V input and 120/120 volt outputs.  The data for the 
voltages is not what I'm expecting, and I am wondering how I should 
interpret it.  Here is an example from upsc:

input.L1-L2.voltage: 121
input.L2-L3.voltage: 120
input.voltage: 121.20
output.current: 5.90
output.L1-L2.voltage: 119
output.L1.current: 5.90
output.L2-L3.voltage: 119
output.L2.current: 1

The "input.voltage" value doesn't reflect the 240 volts that is actually 
being applied.  To get that, would I combine the L1-L2 and L2-L3 voltages?

Note that the "output.current" value matches the L1 output current, 
ignoring the L2 current.  Perhaps that is a clue that the overall 
"input" and "output" values are not meaningful in this case?

How should I interpret these values to know the actual input and output 
voltages and currents?

Thanks!
John