NK TECHNOLOGIES APT Series Power Transducers measures three phases of current and voltage and produces an industry standard analog signal proportional to the watts used. The monitor uses current transformers to measure the amperes and the line voltage connects directly to the transducer, up to 600Vac. By comparing the instantaneous current flow with the circuit voltage, the power factor, whether leading or lagging, allows the APT transducer to produce a signal directly proportional to the wattage used. Devices can be configured to accept 5 A secondary current transformers. Product are externally powered and offer 4-20 mA, 0-5Vdc or 0-10Vdc output. They are housed in a compact DIN mounted case with a low profile that reduces the need for large cabinet depth requirements.
