| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a non-contact voltage/current probe device for accurately measuring voltage and current in a cable. <P>SOLUTION: This non-contact voltage/current probe device includes a toroidal coil 1A having a cylindrical inner core 1 and an inner conductor line 2 wound on the inner core 1, a cylindrical outer conductor 3, a first spacer 4 disposed inside the inner core 1, an electrode 5 for fixing that is disposed inside the first spacer, fixes the cable 7, and has conductivity, a second spacer 6 that is disposed between the inner core 1 and the outer conductor 3 and makes the distance between the inner core 1 and the outer conductor 3 constant, a terminal resistor 8 inserted between both ends of the inner conductor line 2, a metal storage box 10 having a connection terminal 9, a voltage detection circuit 11a for detecting potential difference of one end of the terminal resistor 8 to the earth, a voltage detection circuit 11b for detecting potential difference of the other end of the terminal resistor 8 to the earth, an adder 13a for measuring the sum of potential differences, and a subtractor 13b for measuring the difference between the potential differences. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
