SENSOR UNIT, ELECTRIC POWER MEASUREMENT UNIT AND ELECTRIC POWER MEASUREMENT SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a sensor unit capable of enhancing noiseproof performance of wiring and workability even when the number of power circuits to be measured is extremely large.SOLUTION: A sensor unit 1 includes: a current transformer 10 connected to a circuit as a measurement target; a signal transmitting and receiving section 17 that receives a synchronization signal for taking time-synchronization between a current signal and a voltage signal which is transmitted from an electric power measurement unit 2 for measuring the power on the circuit connected to the current transformer 10; an AD converter 12 that converts an analog current value measured by the current transformer 10 into a digital current value on the basis of the synchronous timing of the synchronization signal; and a control section 14 that controls to output the digital current value to the electric power measurement unit 2. With this configuration, the sensor unit 1 enhances noiseproof performance of wiring and workability even when the number of power circuits to be measured is extremely large.