Purpose of insulator
Insulators make sure the energized parts do not touch the ground. In the picture, the tubular steel is at high voltage while the I-beam at the bottom is at ground potential. All substation equipment touching an energized line or bus employs an insulator.
Cost of insulator
- 345kV and above: ~$5,000
- 138kV insulator: ~$500
Lead time to procure insulator
~8 weeks
Information on cost and lead time is for your general knowledge only. Contact vendor with your equipment specifications for actual figures.
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