Technical GuideSeries 02 · Hollow Insulators
Composite or Porcelain Hollow Insulator: Selection Checks
Compare pressure, cantilever load, weight, creepage, flange interface and the model-specific tests under IEC 61462 or IEC 62155.
HCI11kV ～ 1200kV
Review model drawings and test evidence
Composite & Porcelain Hollow Insulators
UHV Hollow Composite Insulator
Composite hollow insulator housing for high-voltage apparatus; confirm mechanical and pressure duty by model.
Rated Voltage11kV ～ 1200kV
Rated CurrentN/A
Insulation TypeComposite: HTV / LSR Silicone Rubber on Filament-Wound FRP Tube
Catalog standardIEC 61462 / GB/T 21429 / IEEE C57.19.100
PD requirementConfirm by model
Test evidenceRequest with RFQ
Buyer requirement checklist
Define apparatus duty, mechanical loading and flange interfaces.
- Composite, porcelain hollow or station-post application
- Tube ID/OD, length, flange and pressure details
- Bending/torsion load and installation orientation
- Creepage, pollution, altitude and seismic conditions
Scope by product: IEC 61462 composite hollow, IEC 62155 ceramic/glass hollow, IEC 62772 hollow-core station post; IEC 62231 addresses solid-core composite station posts.
Product Technical Overview
Composite hollow insulator construction uses a fiberglass tube, HTV silicone housing and metal flanges. Confirm pressure, cantilever, sealing and fragmentation behavior for the specified model and equipment duty.
EONOVA supplies high-performance composite hollow insulators for high-voltage electrical equipment, including gas-insulated switchgear (GIS), circuit breakers, and other substation applications. Manufactured using advanced composite materials and silicone rubber technologies, these insulators are designed to provide reliable electrical insulation, mechanical strength, and sealing performance. With customizable designs and dimensions, they can be tailored to meet specific equipment requirements and customer drawings.
// CUSTOM SOURCING & ENGINEERING SPECInquire Now
EONOVA supports customers with customized sourcing solutions based on technical specifications, product drawings, and equipment requirements. EONOVA – Your Sourcing Partner for High-Voltage Insulation Solutions from China.
Compatible Substation Apparatus
Circuit Breakers (GCB/GIS)Disconnectors & Earthing SwitchesInstrument Transformers (CT/VT)Power Transformers & BushingsSurge ArrestersHV Cable TerminationsGas-Insulated Switchgear (GIS)High-voltage circuit breakersPower substations & converter stationsSurge Arresters & Cable TerminationsOther high-voltage electrical equipment requiring hollow composite insulation
UHV Hollow Composite Insulator (HCI) Technical Specifications Table
Showing 13 of 13 models
Catalog values are representative. Confirm the selected model, drawings and test evidence during inquiry.Scope by product: IEC 61462 composite hollow, IEC 62155 ceramic/glass hollow, IEC 62772 hollow-core station post; IEC 62231 addresses solid-core composite station posts.
| Model | Rated voltage | Structural height | Creepage distance | Arcing distance | 1 min power-frequency withstand | Lightning impulse withstand | Cantilever / bending load |
|---|---|---|---|---|---|---|---|
| HCI-40.5/12.5 | 40.5 kV | 525 mm | 1040 mm | 355 mm | 95 kV | 200 kV | 12.5 kN |
| HCI-72.5/10 | 72.5 kV | 765 mm | 1820 mm | 595 mm | 155 kV | 325 kV | 10 kN |
| HCI-126/10 | 126 kV | 1380 mm | 4000 mm | 1210 mm | 255 kV | 550 kV | 10 kN |
| HCI-145/10 | 145 kV | 1498 mm | 4640 mm | 1328 mm | 305 kV | 650 kV | 10 kN |
| HCI-170/10 | 170 kV | 1438 mm | 4420 mm | 1268 mm | 305 kV | 650 kV | 10 kN |
| HCI-252/30 | 252 kV | 2450 mm | 8700 mm | 2190 mm | 460 kV | 1050 kV | 30 kN |
| HCI-300/30 | 300 kV | 2640 mm | 9400 mm | 2380 mm | 505 kV | 1050 kV | 30 kN |
| HCI-420/10 | 420 kV | 3252 mm | 10800 mm | 2992 mm | 750 kV | 1550 kV | 10 kN |
| HCI-550/30 | 550 kV | 4330 mm | 15800 mm | 4050 mm | 740 kV | 1675 kV | 30 kN |
| HCI-750/50 | 750 kV | 8100 mm | 31500 mm | 7540 mm | 960 kV | 2100 kV | 50 kN |
| HCI-800/50 | 800 kV | 2680x3 mm | 27900 mm | 6840 mm | 1050 kV | 2400 kV | 50 kN |
| HCI-1100/50 | 1100 kV | 10145 mm | 40300 mm | 9585 mm | 1100 kV | 2400 kV | 50 kN |
| HCI-1200/50 | 1200 kV | 11500 mm | 45500 mm | 10720 mm | 1200 kV | 2400 kV | 50 kN |
Composite hollow insulators (CHI, 11–800 kV): series parameters
| Parameter | Value |
|---|---|
| System Voltage | 11 kV ～ 800 kV (AC/DC ) |
| Silicone Rubber Technology | HTV (High Temperature Vulcanized) & LSR (Liquid Silicone Rubber) |
| Insulating Core Tube | Multi-axis Filament-Wound Epoxy Resin Fiberglass Tube |
| Mechanical Performance | Bending Cantilever Load 10 kN ～ 60 kN (Customized per drawing) |
| Equipment Applications | GIS, Circuit Breakers, Instrument Transformers (CT/PT), Surge Arresters, Cable Terminations |
| Standard Compliance | IEC 61462, IEC 62271-203, IEEE C57.19.100, GB/T 21429 |
Custom Engineering & Flange Dimensions Note:
Dimensions, interfaces and replacement compatibility require approved drawings and technical review.
UHV Hollow Composite Insulator Core Engineering Advantages
Composite construction may reduce hard-fragment hazards; verify internal-pressure and mechanical tests for the specified model.
Composite construction may reduce hard-fragment hazards; verify internal-pressure and mechanical tests for the specified model.
HTV silicone hydrophobicity can reduce cleaning needs; inspect surface condition under the site maintenance plan.
HTV silicone hydrophobicity can reduce cleaning needs; inspect surface condition under the site maintenance plan.
Lightweight Advantage
Lightweight Advantage: Up to 70% lighter than porcelain, drastically reducing transportation, handling, and installation costs.
Rapid Delivery & Customization
Rapid Delivery & Customization: Significantly shorter manufacturing cycle than porcelain, with tailor-made flange configurations.
Rated system voltage from 11 kV up to 800 kV
Rated system voltage from 11 kV up to 800 kV: Comprehensive voltage class coverage from 11kV distribution up to 800kV EHV transmission networks.
HTV and LSR silicone rubber technologies
HTV and LSR silicone rubber technologies: Formulated with advanced high-temperature vulcanized and liquid silicone rubber for durable hydrophobicity.
Lightweight composite construction
Lightweight composite construction: Reduces weight by over 60% compared with porcelain, significantly minimizing seismic inertia, tower stress, and installation costs.
Electrical insulation and end-flange sealing require model-specific PD and leak-test acceptance.
Electrical insulation and end-flange sealing require model-specific PD and leak-test acceptance.
Confirm dimensions, flange bolt pattern and equipment interfaces against approved customer drawings.
Confirm dimensions, flange bolt pattern and equipment interfaces against approved customer drawings.
Suitable for high-voltage equipment and substation applications
Suitable for high-voltage equipment and substation applications: Thoroughly type-tested for GIS, SF6 breakers, transformers, and severe pollution environments.
Compatible Substation Apparatus
Circuit Breakers (GCB/GIS)Disconnectors & Earthing SwitchesInstrument Transformers (CT/VT)Power Transformers & BushingsSurge ArrestersHV Cable TerminationsGas-Insulated Switchgear (GIS)High-voltage circuit breakersPower substations & converter stationsSurge Arresters & Cable TerminationsOther high-voltage electrical equipment requiring hollow composite insulation
UHV Hollow Composite Insulator Materials & Manufacturing Process
Epoxy Fiberglass Tube
Density >= 1.9 g/cm³, Bending Strength >= 120 MPa, Elastic Modulus >= 20 GPa, Tg 130~140℃, Dielectric Loss <= 5x10^-4
HTV Silicone Rubber
Shore A 65~70, Tear Strength >= 12 kN/m, Tensile Strength >= 4.5 MPa, Dielectric Strength >= 20 kV/mm, Flame Retardant FV-0
Aluminum Flange Terminals
Die-cast aluminum flange; confirm heat treatment, porosity acceptance and leak-test requirements by drawing.
Epoxy Resin Glass-Fiber Winding Tube
High-purity E-glass fibers cross-wound with specialty cycloaliphatic epoxy resin for high cantilever burst pressure and tensile modulus.
HTV / LSR High-Grade Silicone Rubber Housing
Directly molded or extruded onto the core tube with molecular bonding, achieving Class 1 hydrophobicity (HC1) and FV-0 flame retardancy.
Anti-Corrosion Aluminum Alloy / Ductile Iron Flanges
Precision CNC machined sealing grooves with double fluororubber O-rings and hot-dip galvanized or shot-peened finish.
Engineering Inquiry Draft
Request Quotation for UHV Hollow Composite Insulator
Enter your requirements and send them to our sales desk. If online sending is unavailable, you get an email draft instead.
UHV Hollow Composite Insulator: FAQ
- What voltage and current range does the UHV Hollow Composite Insulator cover?
- Catalogue voltage range: 11kV ～ 1200kV. Confirm the rating of the specific model and drawing.
- What insulation or construction is used?
- Composite: HTV / LSR Silicone Rubber on Filament-Wound FRP Tube.
- Which standards are referenced?
- Catalogue standard reference: IEC 61462 / GB/T 21429 / IEEE C57.19.100. Request type-test evidence for the specific model.
- Which applications is it used in?
- Circuit Breakers, CT/VT & Surge Arresters; Railway Traction Power Supply.
ENGINEERING WHITEPAPERS & IEC GUIDES
View All 10 WhitepapersRelated Technical Selection & Standard Guides
Material ScienceSeries 03 · GIS Cylinders & Rods
GIS Insulation Tubes and Operating Rods: Drawing and Test Review
Review material, mechanical duty, insulation clearance, connection drawings and qualification tests for GIS insulating tubes and rods.
Material ScienceSeries 02 · Hollow Insulators
Silicone Rubber Insulators: Hydrophobicity and Creepage Selection
Review pollution severity, hydrophobicity, tracking resistance and creepage; confirm material and test evidence for the specified insulator.
COMPLEMENTARY SERIES
View All 7 Series
