| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent lightening current from spreading into loading apparatuses even when a lightening resistant transformer is broken by lightening surge exceeding the insulating strength of the lightening resistant transformer, in an electric facility where a lightening resistant transformer is installed. <P>SOLUTION: A method for protecting the electric facility from lightening comprises: placing an iron core 27 arranged between input winding 25 and an output winding 26; and arranging a lightening resistant transformer 24 between an input power supply wire 22 and the loading apparatus 23 storing an electrostatic shielding 28 arranged between the iron core 27 and at least the output winding 26, in a housing 34. The method comprises: placing the lightening resistant transformer 24 through an insulating member 41 in a structure 21; and earthing the iron core and the housing 34 of the lightening resistant transformer 24 by an insulating electric wire 42, which is different from an insulating electric wire 44 that connects the electrostatic shielding 28 and the loading apparatus 23 to ground. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
