These units from Wattnode output a pulse which is proportional to kWh and used with the pulse input adaptor.
The WNB-3Y-400-P model works with 400/230V systems with Wye configuration and is suitable for New Zealand mains power systems.
It works with up to 3 AC Current Transformers and a Pulse Input Adapter to provide True RMS kilowatt hours of energy used, even for loads with non-sinusoidal waveforms
Features:
Accurate measurement of 1-,2-, or 3-phase configurations