The Three-Phase Power-Factor Meter consists of one meter providing a direct measurement of lagging or leading power factor in three-phase balanced circuits. Its electronic design uses voltage and current sensors to sample line voltage and current. Voltage and current circuits are internally connected so that students only have to connect the line and load terminals of the module. Connections are made through 4-mm color-coded jacks. A 24 V ac power source (available from the Power Supply, Model 8525-2) is required to operate the unit.