POWER MEASURING SYSTEM, MEASURING APPARATUS, LOAD TERMINAL, AND DEVICE CONTROL SYSTEM

摘要

A power measuring system, a measuring apparatus, a load terminal, and a device control system are provided, which need no special installation work to be made by any skillful professionals such as persons qualified for electrical work. A voltage sensor 2 detects a voltage waveform of a power line 1 in a noncontact manner, and a current sensor 3 acquires a current waveform of the power line in a noncontact manner. A measuring portion 10 of a load terminal 8 operates a contact means 11 to connect the power line 1 and a voltage measuring terminal 12 to measure a current flowing from the power line 1 to a load 13 and to calculate a voltage value from the measured current value and the load 13. The measuring portion 10 of the load terminal 8 transmits, in response to a request from a measuring apparatus 4, the measured current value and the calculated voltage value to the measuring apparatus 4 via a communication means 14. A control portion 5 of the measuring apparatus 4 receives the current value and the voltage value from the load terminal 8 via a communication means 6. The control portion 5 calculates a power value based on the received current value and voltage value, as well as on the voltage waveform acquired from the voltage sensor 2 and the current waveform acquired from the current sensor 3.