The high-
voltage insulator for securing a high-
voltage conductor in an electrical
plant or in an
electric power line comprises an insulating core, the first end of which is used for mechanically connecting to a
high voltage conductor and / or to its
coupling means, the second end being provided with a
metal fastening element for fixing the insulator to a support, such as a
tower. In order to impart
lightning protection properties to the insulator, it is additionally provided with a multi-
electrode system consisting of m electrodes which are mechanically attached to the insulating core and are arranged between the ends thereof. The electrodes are disposed in such a way as to support a formation of an
electric discharge between the adjacent electrodes, between the
electrode adjacent to the first end of the insulating core and to the
high voltage conductor or to said
coupling means, and between the
electrode adjacent to the second end of the insulating core and the
metal fastening element attached to the
tower. The insulator is provided with means for compensating the reduction of the insulator creepage distance caused by the multi-electrode
system. The
electric power line using the insulator of this type does not require any
lightning arresters.