| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a noncontact-type voltage and current probe device for voltage in a cable and the current which flows in the cable. <P>SOLUTION: This noncontact-type voltage and current probe device includes a toroidal coil 1A, having a cylindrical inner core 1 formed in its inside with a space through which the cable 6 is penetrated, and an internal conductor line 2 wound around the inner core 1; a cylindrical outer conductor 3; formed in its inside with a space through which the cable 6 is penetrated, and in which the toroidal coil 1A is arranged; a terminal-end resistance 8 inserted between one end and the other end of the inner conductor line 2; a metal storage box 10, provided with a connection terminal 9 that is a means for connecting the outer conductor 3 to the ground; a voltage-detecting circuit 11a for detecting the potential difference in one end of the terminal end resistance 8, with respect to the ground; a voltage-detecting circuit 11b for detecting the potential difference at the other end of the terminal end resistance 8, with respect to the ground, an adder 13a for measuring the sum of the detected fellow potential differences; and a subtracter 13b for measuring the differences among the potential differences themselves detected. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
