| 摘要 |
<p>PURPOSE:To obtain a zero phase voltage detector with a simple structure. CONSTITUTION:Division cases 14a-14c are provided with conductors U, V and W of phases led in. The division cases 14a-14c are provided with division electrodes 21 fitted loosely in the perimeter of the conductors U, V and W of phases and an earth electrode 22 is provided outside the division electrodes 21 to divide voltages applied to the conductors U, V and W. A capacitor 30 is arranged between the division electrodes 21 and the earth electrode 22 connected mutually and a zero phase voltage is applied to one voltage sensor head 31 to be converted to a light signal. The light signal is transmitted to a control section 41 with an optical fiber led from a body case 5.</p> |
