Aug. 16, 2018
The new AC powerless panel meter, Model TAC, monitors 1 or 3 phase, “delta” or “Y” AC power lines. The unit features multicolor 0.8-in., 3-?-digit LED displays. It is powered by the signals that it measures for AC volts, amps, watts and hertz. The burden on the AC volts is only a few milliamps directly from the mains or from a P.T. The amps use the customer’s existing C.T. to derive the signal and power.