Attached is a diagram that shows you how to use a T-VER-E50B2 Power and Energy Meter and UX120-017 data logger to monitor energy in a 3-phase circuit.
Warning:
Installing transducers in an energized electrical enclosure or on any energized conductor can result in severe injury or death. These transducers are for installation by qualified personnel only. To avoid electrical shock, do not perform any installation or servicing of these transducers unless you are qualified to do so. Disconnect and lock-out all power sources during installation and servicing. Please read transducer user manuals for instructions and use.
Helpful links:
T-VER-E50B2 Power & Energy Meter
UX120-017 Four Channel Pulse Input Data Logger
T-MAG-SCT-XXX Current Transformer (model required may vary from that depicted here, depending on the circuit being monitored)