The Veris AC Kilowatt Transducer incorporates one split-core AC current sensor and two voltage leads and outputs a signal proportional to kilowatts of power (consumption). Accepting an input primary voltage of 208 to 480 Volts AC rms, this transducer requires a Pulse Input Adapter. Because these sensors tie directly into the line, they should be used only by qualified personnel. NOTE: Not recommended for use with variable frequency drives.