These units from Wattnode output a pulse which is proportional to kWh and used with the pulse input adaptor.
The WNA-3Y-400-P model works with 400/240V systems with Wye configuration.
It works with up to 3 Magnelab AC Current Transformers and a Pulse Input Adapter to provide True RMS kilowatt hours of energy used, even for loads with non-sinusoidal waveforms. Because these sensors tie directly into the line, they should be used only by qualified personnel.
Features:
Accurate measurement of 1-,2-, or 3-phase configurations