The CCS WattNode Pulse WNB-3D-400-P is a true RMS AC watt-hour transducer with pulse output proportional to kWh consumed. WattNode Pulse model WNB-3D-400-P measures 3 phase 3-wire Delta with 400Vac with no neutral configuration, and 3 phase 4-wire Wye configuration with 230 to 400Vac.
*Delta model WNC-3D-400-P works either with or without a neutral connection, but require a line-to-line voltage connection for operating power.