|発明の名称||POWER MEASURING DEVICE|
PROBLEM TO BE SOLVED: To provide a power measuring device of a compact type capable of measuring the measuring item such as effective power, non-effective power, power factor, and apparent power with a single element.
SOLUTION: A power measuring device includes: a pair of coupling terminals to be coupled in parallel to a load for a power source; a sensor element having a pair of sensor terminals provided on both ends of a magnetic film part and arranged adjacent to a connection wire so that one end of the sensor is connected to one of the coupling terminals and a longitudinal direction of the magnetic film part becomes approximately parallel to the direction to which the current of the connection wire flows; n pieces of band pass filters connected in parallel to the other end of the sensor terminals of the sensor element; phase adjusters connected in series to each of the band pass filters; a selection switch for selectively connecting the phase adjusters; a measuring register one end of which is connected to a selector switch and the other end of which is connected to the other end of the connection wires; and a voltage detection part for measuring the voltage between the measuring terminals with each end of the sensor terminals used as the measuring terminals, respectively.
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