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Pin Insulator

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Porcelain Versus Polymer Insulator:

Depending on the application, it may be more prudent to choose either a Porcelain Pin Insulator or a polymer insulator. Please use the charts below to compare the different types of insulators:

Porcelain Insulator AdvantagesPorcelain Insulator Disadvantages


Very long life, made of inorganic materials and do not age.
Very reliable, with a proven track record. Over 80 years of experience
Have higher leakage distance profiles
Easier to maintain, can be coated and washed
Have more flexibility in length with more units
Easy to identify a damaged unit
Strong in compression
Heavy, leading to more expensive shipping and more difficult handling
Could have hidden defects that are hard to detect
Vandalism is common from thrown rocks, or from being shot at
Pin erosion, and coupling hardware corrosion
Cement growth cracking
Weaker in tension

Polymer Insulator AdvantagesPolymer Insulator Disadvantages


Lighter in weight, almost a 90% weight reduction. This weight reduction leads to easier handling, reduced shipping and installation costs.
Better performance in high contamination areas
Overall better handling of shock loads
More aesthetically pleasing the eye, and smaller profile
More resistant to vandalism and breakage due to the forgiving nature of polymer
Strong in tension
More susceptible to damage from arcing or flash overs
Less experience in the field, still changing as more polymer products come out
Harder to check for inconsistencies or damages
Dimensions vary
Storage concerns
Dry arc distance is lower
Interface bonding issues
Weaker in compression

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