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Polymer disc insulator

Polymer disc insulator is made from silicone rubber and composite, also called silicone rubber suspension insulator or composite suspension insulator consisting of FRP core, silicone rubber housing, shed and end fittings.

Polymer disc insulator                composite suspension insulator

Compared with porcelain suspension insulator, polymer disc insulator advantages have:
Polymer Disc Insulators heavy in weight, approx wt of 400KV is about 135 kg. 90% lighter than porcelain disc insulators, but offer an equal to better strength. Approx wt of 400KV is less than 14 kg range ability highly fragile to shock & vibration not fragile to shock spackling & transport risky & expensive easy & economical installation risky, expensive and more labor required very easy & economical handling difficult easy maintenance cost high low vandalism more susceptible highly resistant breakages & secondary damage highly fragile - 10 to 15% breakages are reported during transportation, storage and installation composite insulators are flexible and therefore, highly resistant to breakages for polymer disc insulator.

The mechanical strength for polymer disc insulator:
Mechanical failure reductionism in mechanical strength and separation for porcelain disc insulator due to pings getting eroded Single piece hence no such problem resistance to flash overs & puncture slow high anti tracking and erosion resistance very low - poor tracking resistance excellent tracking resistance avoids erosion or tracking of the housing material. Die electric strength lower than polymer excellent insulation performance contamination & pollution for porcelain disc insulator highly affected not affected and has longer life hydrophobicity non hydrophobic, porcelain surface forms water film on the surface making easy path leading to more flash overs the hydrophobicity properties of silicon rubber provide excellent insulating behavior and resists wetting by forming beads of water without the need of washing or greasing even in humid or polluted climates. The mechanical strength is one main of polymer insulator technic parameters. 


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