| 摘要 |
<p>PURPOSE:To lower overcurrent constant to less than normal value by inserting a magnetic substance of a lower saturated magnetic flux than that of a magnetic substance composing iron core into the magnetic path of iron core. CONSTITUTION:A slit is provided in the iron core 1, and then the insertion 2 of a magnetic substance having a comparatively low saturated magnetic flux, e.g., permalloy, etc., is inserted into the slit. Thus, the saturation characteristics of iron core can be regulated.</p> |
