Abstract :
A THERMAL CONVERTER, used as a primary element in the telemetering or totalizing of large power loads, is a measuring instrument which generates a direct voltage accurately proportional to the power of the a-c circuit measured. The output voltages of two or more converters may be connected in series and the algebraic sum of the loads so totalized may be recorded or indicated, remotely if desired, by a potentiometer. In principle, the thermal converter comprises an a-c circuit such that the difference in power generated in two heaters is proportional to the measured load; and the temperature difference thus produced is measured by thermocouples. In addition to power the thermal converter may be adapted to measure reactive power, power factor, current, or voltage.
