| 摘要 |
<p>PURPOSE:To prevent a space loss by insulating electrically the first and the third windings in one winding groove from each other with the second winding in the same winding groove to make it unnecessary to provide winding grooves and collars specially in a bobbin for the purpose of insulating the first winding. CONSTITUTION:Intensities of electric field between a secondary winding H and a dummy winding D and between the dummy winding D and a detecting winding B are 13.9kVDC/mm., and a sufficient margin is secured for 27.5kVpeak/mm. of a semipermanent use limit value of one kind of copper wire. If the dummy winding D is not provided, said intensities of electric field are 27.8kVpeak/mm. and exceed the limit value, and the device is not available. That is, since the intensity of electric field between insulating coated copper wires adjacent to each other is reduced by the dummy winding D, it is unnecessary that special winding grooves and collars for the detecting winding B are provided as conventional to insulate the detecting winding B and the secondary winding H from each other.</p> |
