INSULATOR

Elements, which insulate and transfer the power transmission lines, switchyards and busbars in distribution centers from the places where they are identified in, are called insulators.

There are two main missions of insulators which are used in energy transmission and distribution;

-          Separating the conductors from the ground as electrically

-          Meeting the additional loads coming to the conductors and conductor’s weight

Insulators are manufactured from the glass and ceramic which resists the current greatly and substantial to the cold and hot weather conditions. In addition to that, insulators with epoxy resin and silicon are produced.  However, they are not used generally because of their costs. They have to need high mechanical resistance in order to carry the loads which can come to the conductor safely.

PARTS OF THE INSULATOR

1.Shaft: Anchored portion of the conductor and the iron support.
2.The anchor slot: The screw or flat  portion of the insulator iron which drops-down to the insulator for the detection of insulator.

3.Shield or skirt (dropper): made of one or more wings to the shaft to increase the electrical resistance of the insulator.

4.Conductive slot: slots for the placement of conductors to be connected to insulators.

5.Iron anchor (insulator iron): iron portion in order to determination on direct or console (travers) to the insulator.

Test

This is suitable for suspension or overhead line electrical insulation. Silicon insulator has good mechanical properties and high tensile strength. Also, it is tough and easy-mounted. Especially, it expedients to the so that contamination. Usually, its voltage level is between the 10 kV and 1000 kV.