Power Line Insulator Supplier — Composite, Porcelain & Glass
Suspension, strain, and pin insulators for overhead transmission and distribution lines — composite polymer, porcelain, and glass types available across voltage grades, compliant with IEC 60305, IEC 60433, and IEC 60372, supplied standalone or with conductor and fitting orders.
Composite / Porcelain / Glass Suspension, Strain & Pin Types IEC 60305 / 60433
Transmission Lines
Distribution Poles
Substation Structures
Renewable Energy Projects
Railway Electrification
Composite, Porcelain and Glass Insulators for Overhead Lines
Suspension, strain, and pin insulators across composite, porcelain, and glass material options. Available for distribution and transmission voltage grades from 11kV to 220kV and above.
14-24 kv Shackle Insulator
View Details Galvanized Steel Pin Insulator
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Porcelain Insulator, Weight: 169.3 lb
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Silicone Polymer Deadend, 15,000 lb
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Silicone Station Post Insulator
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Steel Insulated Secondary Clevis, Weight: 2.7 lb
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Suspension Clevis Tongue Insulator
View DetailsTechnical Specifications
| Type | Material | Application | Voltage Range | Mechanical Load | Leakage Distance | Standard |
|---|---|---|---|---|---|---|
| Suspension Disc Insulator | Porcelain / Glass | Tension string, suspension string | 11kV – 500kV | 40 – 300 kN | Per IEC 60305 | IEC 60305 |
| Composite Suspension Insulator | Polymer (Silicone Rubber) | Suspension and tension strings | 11kV – 500kV | 40 – 300 kN | Per IEC 60433 | IEC 60433 |
| Pin Insulator | Porcelain | Distribution line, < 33kV | Up to 33kV | — | Per IEC 60672 | IEC 60672 |
| Composite Pin Insulator | Polymer (Silicone Rubber) | Distribution line, < 33kV | Up to 33kV | — | Per IEC 60433 | IEC 60433 |
| Strain / Dead-End Insulator | Porcelain / Polymer | Angle towers, dead-end structures | 11kV – 220kV | 70 – 210 kN | Per IEC 60305 / 60433 | IEC 60305 / 60433 |
Specific creepage distance, mechanical failing load, and pollution class (per IEC 60815) available on request. Specify voltage class, insulator type, mechanical load requirement, and environmental pollution level when requesting a quote.
Insulators, Conductors, and Hardware — One Complete Line Supply
Overhead transmission and distribution line projects require insulators, conductors, hardware fittings, and surge protection to be sourced, matched, and delivered together — managing separate supplier lead times for the same line section is one of the most avoidable causes of project schedule risk.
LX Cable’s BOMFLEX service consolidates your complete overhead line material package:
For EPC contractors and utility procurement teams managing overhead line BOMs, BOMFLEX eliminates the need to coordinate multiple suppliers for the same project section.
- Suspension, strain, and pin insulators matched to your voltage class and pollution level
- ACSR, AAAC, and AAC conductors in the required Code Name and cross-section
- Suspension clamps, strain clamps, tension clamps, and connection hardware
- Surge arresters for pole-top and substation overvoltage protection
- Consolidated into a single shipment with full export documentation
Why Project Teams Source Insulators from LX Cable
Verified Supplier Network
Insulators sourced from qualified manufacturers with full IEC documentation and type test records — the same supply chain used across BOMFLEX project deliveries.
25+ Years of Experience
Supporting overhead transmission and distribution line projects since the 1990s, with practical knowledge of insulator selection for African and Middle Eastern grid environments.
IEC-Compliant Documentation
Insulators supplied with type test certificates, routine test reports, and pollution class classification documentation for project handover.
130+ Countries Delivered
Proven export logistics for line materials and cables — consolidated project shipments to over 130 countries worldwide.
Frequently Asked Questions
Composite insulators use a fiberglass reinforced polymer (FRP) core with a silicone rubber housing, providing high hydrophobicity, resistance to pollution flashover, light weight, and resistance to vandalism. Porcelain insulators are made from glazed ceramic, offering proven long-term performance and resistance to UV degradation, but are heavier and more susceptible to flashover in heavily polluted environments. Composite insulators are now the preferred choice for most new overhead line installations, particularly in coastal, industrial, or desert environments with high pollution levels.
The key selection parameters are: system voltage (kV), pollution severity level at the installation site (IEC 60815 classes: very light, light, medium, heavy, very heavy), mechanical load requirement (weight of conductor span plus ice and wind loading), and insulator type (suspension, strain, or pin depending on tower configuration). For critical transmission line projects, specify all four parameters and include the line route environmental description in your inquiry.
Yes. Through the BOMFLEX service, LX Cable supplies insulators alongside ACSR, AAAC, and AAC conductors, suspension clamps, strain clamps, tension hardware, and surge arresters in a single consolidated shipment. This is the standard procurement model for overhead line projects requiring all line materials from a single delivery.
Insulators are available for all IEC 60815 pollution severity levels — very light (a), light (b), medium (c), heavy (d), and very heavy (e). The required creepage distance per kV of system voltage increases with pollution class. Specify the pollution class and any relevant site condition (coastal, industrial, desert, agricultural) when requesting a quote.
Suspension insulators (also called disc insulators or cap-and-pin insulators) are used in suspension strings where the conductor is supported vertically from a crossarm or tower. Strain insulators (dead-end or tension insulators) are used at angle points and line terminations where the conductor is anchored to resist the full tension load of the conductor. The two types have different mechanical load ratings and fitting configurations.
Insulators are supplied with a product datasheet, IEC type test certificate, routine test reports, and dimensional drawings. For projects requiring pollution class certification and detailed creepage distance documentation, these can be provided on request.
