| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a current measurement apparatus capable of automatically detecting a conversion rate of a current sensor having a current transformer, and to provide a method for detecting the conversion rate of the current sensor. <P>SOLUTION: The current measurement apparatus 1 outputs a current for detecting a conversion rate from an AC power source 17 to the current transformer 36 in order to detect the conversion rate between a current value of an AC current of the current sensor 2 having the current transformer 36 and a detection value, allows a sensor voltage measurement part 13 to measure a voltage value between both ends of a shunt resistor 37 connected in parallel with the current transformer 36 in an electromagnetic coupling state between the current transformer 36 and a conversion rate detecting wire 39, allows a conversion voltage measurement part 14 to measure a voltage value between both ends of the conversion rate detecting wire 39, allows a current measurement part 16 to measure a current value of the conversion rate detecting current outputted from the AC power source 17, and allows a conversion rate calculation part 18 to calculate the conversion rate of the current sensor 2 based on both the measured voltage values and the measured current value. <P>COPYRIGHT: (C)2012,JPO&INPIT |
