LP-2W3 THREE PHASE WATT TRANSDUCER ,LP-2W3H THREE PHASE WATT TRANSDUCER PLUS kW-hour PULSE OUTPUT The LP-2W3 three phase watt transducer converts ac current and voltage signals into a bidirectional dc output signal proportional to the active power flowing in the circuit. The transducer is designed for 3 phase 3 wire systems with an unbalanced load.