The Advantages of Polymer Insulators over Porcelain Insulators will be shown through weight, fragibility, packing & transport, installation, handling, maintenance cost, mechanical failure, Manufacturing Process, etc.
The Advantages of Polymer Insulators over Porcelain Insulators:
The Advantages of Polymer Insulators over Porcelain Insulators
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GENERAL COMPARISION
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FACTOR
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CERAMICS
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POLYMER INSULATORS
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WEIGHT
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Heavy in weight, approx wt of 400 kv is about 135 kgs.
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90% Lighter than Porcelain Insulators, but offer an equal to better strength. Approx Wt of 400 kv is less than 14 kgs
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FRAGIBILITY
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HIGHLY FRAGILE to Shock & Vibration
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NOT FRAGILE TO SHOCKS
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PACKING & TRANSPORT
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RISKY & EXPENSIVE
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EASY & ECONOMICAL
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INSTALLATION
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RISKY, EXPENSIVE AND More Labour
required
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Very EASY & ECONOMICAL
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HANDLING
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DIFFICULT
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EASY
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MAINTENANCE COST
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HIGH
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LOW
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VANDALISM
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MORE SUSCEPTIBLE
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HIGHLY RESISTANT
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BREAKAGES & SECONDARYDAMAGE
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Highly Fragile - 10 to 15% breakages are reported during transportation, storage and installation
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Composite Insulators are flexible and therefore, highly resistant to breakages.
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TECHNICAL CAMPARISON
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MECHANICAL FAILURE
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REDUCTION IN MECHANICAL STRENGTH AND SEPERATION DUE TO PINGS GETTING ERODED.
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SINGLE PIECE HENCE NO SUCH PROBLEM
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RESISTANCE TO FLASHOVERS &PUNCTURES
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LOW
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HIGH
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ANTI TRACKING AND EROSIONRESISTANCE
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Very low, Poor Tracking Resistance
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Excellent Tracking Resistance avoids erosion or tracking of the housing material.
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DIELECTRIC STRENGTH
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LOWER THAN POLYMER
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EXCELLENT INSULATION PERFORMANCE
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CONTAMINATION & POLLUTION
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HIGHLY AFFECTED
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NOT AFFECTED AND HAS LONGER LIFE
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HYDROPHOBICITY
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Non hydrophobic, Porcelain surface forms water film on the surface making easy path leading to More flash overs
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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. Hence low failure rate combined with low overall operating and maintenance costs.
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SELF CLEANING QUALITY
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NO. -Dirt, Sand, Salt & Snow are easily Attracted
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YES.
Due to Hydrophobicity recovery characteristic
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TENSILE STRENGTH
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Good
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Excellent due to crimping technology
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MAINTENANCE
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NEEDS MAINTENANCE LIKE CLEANING, WASHING AND GREASING
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NO MAINTENANCE IS REQUIRED
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DESIGN
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Design Flexibility is limited. Requires larger and heavier towers for installation and more space.
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Polymer Insulator Design allows for adaption to suit specific needs such as creepage distance. Results in space saving and lower cost
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Manufacturing Process
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Porcelain insulators require long Manufacturing process leading to Long delivery Time. Manufacturing Process causes pollution & health risk.
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Pollution Free, safe, Short Process time Leading to short delivery periods
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safety
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Porcelain insulators are susceptible to explosion & Breakages, due to high fragile properties , stone throwing etc.
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Composite Insulators provide very high level of safety, superior flexibility and strength. Not susceptible to explosion. No breakages due to stone Throwing etc.
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