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Image: Ceramic electric insulator

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Description: 10 kV ceramic pin insulator. This is used for insulating electric power distribution lines where they are supported by utility poles. The insulator mounts on a pin sticking up from the crossarm of the pole. The power line is tied to the top. It is moulded in a series of concentric disk shapes to increase the surface distance (creep length) along the insulator from one end to the other, to reduce surface leakage currents and also reduce the chance of flashover arcs.
Title: Ceramic electric insulator
Credit: Own work
Author: Hiuppo
Usage Terms: Creative Commons Attribution-Share Alike 2.5
License: CC BY-SA 2.5
License Link: http://creativecommons.org/licenses/by-sa/2.5
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