WATT-HOUR METER FOR UNIT FAMILY

摘要

PURPOSE: A watt-hour meter is provided to maintain continuity by removing quantization errors generated in a process of integrating watt-hour. CONSTITUTION: A voltage signal detecting/converting unit(100) detects the first voltage signal proportional to a load voltage applied to a power supply line and converts it into a certain level of the second voltage signal. A current signal detecting/converting unit(110) detects a current signal and converts it into the third voltage signal. A calculator(120) calculates the second and third voltage signals from the detecting/converting units(100,110) into a certain amount of watt-hour. A frequency converter(130) converts the watt-hour from the calculator(120) into a frequency signal. A storage unit(150) stores an integrated result in a central processing unit(140). An output unit(160) outputs the integrated result in the central processing unit. A communication unit(170) supports communication with an external remote detector. An ID setting unit(180) sets an ID for identifying a unit family. A pulse output unit(190) outputs a pulse for a certain amount of watt-hour.