| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a small-sized and low-cost current sensor which detects conduction states of a plurality of power supply lines, and to provide a core for the current transformer. SOLUTION: A pair of core segments 22 each of which is approximately in the shape of the teeth of a comb are counterposed at a specified interval, and a detecting portion H1, H2 and H3 into which each power supply line 27u, 27v and 27w is inserted is formed into a partition. Along with it, a magnetic gap S1, S2, S3 and S4 is formed in each detecting portion H1, H2 and H3. Hall elements 25, 26 are arranged in the magnetic gaps S1, S4 respectively.</p> |
