The coupler of the present invention includes a plurality of core members that are disposed between the semi-conductive ground jacket and neutral conductor of a standard URD MV cable. The core members are series wound by a transformer conductor, which forms a secondary winding that is coupled to the...http://www.google.com.hk/patents/US6982611?utm_source=gb-gplus-share專利 US6982611 - Power line coupling device and method of using the same
