Ceramic VS Composite
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| Factors | Ceramic | Composite |
|---|---|---|
| Resistance to flashovers in Polluted atmosphere. | Low | High |
| Resistance to puncture | Puncturable (Class: B insulators) | Not puncturable |
| Resistance to Tracking and Erosion in Polluted atmosphere | Low | High |
| Contamination & Pollution | Highly affected | Performance not affected |
| Hydrophobicity | Non hydrophobic. | Unique Hydrophobicity character. |
| Self cleaning property | Due to Glaze and inclination of sheds. | Due to Hydrophobicity recovery characteristic |
| Maintenance | Needs maintenance like cleaning, washing, greasing. | No maintenance is required |
| Weight | More | 10% to 35% of Ceramic Insulator |
| Resistance to breakage and Vandalism | Breakable in Vandalism prone areas | Unbreakable |
| Artificial Pollution Test | Mandatory | Not applicable |
| Power Arc Test | Mandatory | Not applicable |
Composite Insulators advantage over Ceramic Insulators
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Light weight
Ease of Installation
Long term surface hydrophobicity and insulating properties
Superior anti-tracking properties
Resistance to breakage and vandalism; practically unbreakable
Unique self cleaning property
Suitable for polluted environment and salty atmosphere etc.
High mechanical strength
Choice of end fittings
Long Life
Reduced maintenance cost
Power loss by leakage current across the insulator is minimized using a special polymer compound
Compliance with IEC:61109