What is Insulator
An electrical insulator supports and isolates live conductors, using high resistance and adequate air/creepage distances to prevent current from flowing to ground or between phases. Common tpyes include porcelain and composite insulators, they serve distribution/transmission lines (pin, suspension, strain), substation bus and equipment leads, and harsh sites such as coastal, heavy-pollution, and railway catenary systems. HAIVOL range spans polymer and porcelain across wide voltages, with high-strength FRP cores, hydrophobic silicone or dense glazed porcelain, extended creepage, and IEC/ANSI compliance—enabling lighter installs, superior pollution performance, and lower total life-cycle cost.
HAIVOL Insulator Advantages
Complete portfolio, standards-ready
Polymer (composite) and porcelain ranges cover pin, post, long-rod, line-post, shackle, and spool types across distribution to high-voltage levels, engineered to align with IEC/ANSI specifications for global projects.
Reliable in harsh environments
Hydrophobic silicone housings (with hydrophobicity transfer) and dense glazed porcelain deliver strong pollution performance, UV/ozone resistance, and stable insulation in coastal, industrial, and high-altitude conditions.
High mechanical strength & sealing integrity
FRP core rods and precision-crimped metal end fittings with multi-barrier sealing provide robust tensile capacity and long-term moisture protection; published creepage, arcing distance, and load ratings support structural verification.
Engineering data & customization
Complete datasheets (Uc/Ur, creepage, arcing distance, power-frequency and lightning impulse withstand, SML) plus options for colors and tailored designs enable fast, specification-driven selection for lines, substations, and railway catenary.
Porcelain Insulator & Composite Insulator
HAIVOL common types of insulators include Porcelain Insulator and Composite Insulator. Scroll down to see the characteristics of the two.
Porcelain Insulator
Porcelain insulators are glazed, sintered-ceramic components that mechanically support and electrically isolate conductors in ≥1 kV systems, engineered to meet creepage, flashover/breakdown, and mechanical load requirements. Main types include pin-type, suspension/cap-and-pin strings, post (line/station), long-rod, plus auxiliary shackle/spool units. Across overhead lines, substations, and railway catenary, porcelain insulators provide mechanical support and electrical isolation under demanding electrical, mechanical, and environmental conditions. Selection aligns with voltage class, mechanical load, and site severity (pollution, salt fog, altitude) to ensure long-term reliability.
Composite Insulator
A composite (polymer, non-ceramic) insulator combines a load-bearing FRP core rod, bonded silicone-rubber housing/sheds, and metal end fittings to support and electrically isolate conductors on ≥1 kV systems; silicone’s inherent and transferable hydrophobicity limits surface leakage under pollution. Main types include long-rod (suspension/tension), line-post (horizontal/vertical), pin-type (distribution), and station-post (substation) designs. They are deployed on distribution and transmission lines, in substations, and on railway catenary—especially in coastal, industrial-pollution, high-altitude, and seismic areas.
Porcelain Insulator VS Composite Insulator
Porcelain insulators use dense glazed ceramic for inherent dielectric stability and rigid geometry; composite insulators pair a high-strength FRP core with silicone sheds. Composites are significantly lighter, reducing tower loading and speeding installation, while porcelain is heavier and more brittle. In polluted or coastal environments, silicone’s inherent/transferable hydrophobicity keeps leakage currents low; porcelain typically relies on longer creepage and periodic washing. Lifecycle-wise, porcelain offers long field history with visible failure modes; composites require attention to sealing and surface aging but often deliver lower maintenance and total cost in weight-critical or hard-to-access corridors.
HAIVOL Insulator Applications
Overhead Lines (Distribution & Transmission)
Pin/line-post and long-rod designs support and isolate conductors on straight runs, angles, and dead-ends, sized for utility-class mechanical loads and creepage distances across MV to EHV corridors.
Substations & Switchyards
Station-post insulators carry busbars, disconnectors, and equipment leads, engineered for high cantilever strength and required clearances/creepage under specified IEC/ANSI voltage classes and pollution levels.
Rail Electrification (Catenary/OHLE)
Composite and porcelain units provide compact, high-strength insulation for high-speed and conventional lines, maintaining hydrophobic performance and stability under vibration, weather, and contamination.
Transformers & Outdoor Apparatus
Insulators serve as rigid supports and terminations for transformer connections, reclosers, sectionalizers, arresters, and similar equipment, with options tailored to site altitude, salt fog, and maintenance strategy.
Resource
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Why Choose HAIVOL
We are provider of power equipment and services for the global electric utility industry.
Utility-grade credentials you can verify
ISO 9001/45001/14001 quality, safety, and environmental systems; type-tested products with certifications from leading European high-voltage labs, designed and manufactured to IEC/ANSI for utility bidding and acceptance.
Complete T\&D portfolio and global project reach
From 10 kV to 220 kV, we supply insulators (porcelain & composite) alongside surge arresters, fuse cutouts, disconnect/load-break switches, line fittings, separable connectors, and cable accessories—delivering consistent specs across nearly 50 countries.
Customization, OEM/ODM, and EPC support
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