| 摘要 |
<p>PURPOSE:To easily protect a trailing detecting circuit by using magnetic cores including a magnetic core which has a gap for the current detector. CONSTITUTION:The gap 4 is formed in the magnetic core 1 and a magnetic core 2 or 3 is inserted to form the current detector. Then magnetic flux produced corresponding to a current flowing through a measurement line 5 passes through a magnetic path 8 when the current is small, but is shunted to a magnetic path 9 determined by the length of the gap 4 that the magnetic path 9 has and the value decided by the magnetic flux density of magnetic paths 9 and 8 when the current is large. Therefore, a voltage and a current induced at a coil 7 are suppressed by setting the gap 4 and the magnetic flux density of the magnetic paths 8 and 9 properly to suppress a high voltage or large current generated by a trailing detecting circuit.</p> |
