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.
PHI11kV ～ 1100kV
Review model drawings and test evidence
Composite & Porcelain Hollow Insulators
High-Strength Porcelain Hollow Insulator
High-alumina porcelain formulation with extreme bending and cantilever mechanical endurance for harsh grid environments.
Rated Voltage11kV ～ 1100kV
Rated CurrentUp to 6300A
Insulation TypeHigh-Strength Aluminous Porcelain (C-130)
Catalog standardIEC 62155 / GB/T 8287.1 / IEC 60168 / IEEE C57
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
EONOVA high-strength porcelain hollow insulators are engineered using premium aluminous porcelain (C-130 grade) and precision isostatic wet turning processes. Widely utilized as insulating housings for high-voltage SF6 circuit breakers, instrument transformers (CT/PT), surge arresters, and cable terminations from 40.5kV to 1100kV UHV networks.
EONOVA supplies high-voltage porcelain hollow insulators designed for electrical insulation applications in power transmission and distribution equipment. Manufactured from high-quality electrical porcelain, these insulators feature a hollow structure designed to meet the insulation and mechanical requirements of high-voltage electrical systems. With a ribbed external profile and customizable metal flange interfaces, porcelain hollow insulators can be configured to suit different equipment designs and installation requirements.
// CUSTOM SOURCING & ENGINEERING SPECInquire Now
EONOVA provides sourcing solutions for porcelain hollow insulators based on customer specifications, technical requirements, and equipment drawings. EONOVA – Your Sourcing Partner for High-Voltage Insulation Solutions from China.
Compatible Substation Apparatus
High-Voltage SF6 Circuit Breaker InterruptersCurrent & Voltage Instrument Transformers (CT/PT)Surge Arresters & Cable TerminationsSubstation Outdoor Busbar & Switchgear BushingsGas-Insulated Switchgear (GIS)High-voltage circuit breakersInstrument transformers and other electrical equipment, subject to design requirementsHigh-voltage substations
High-Strength Porcelain Hollow Insulator (PHI) Technical Specifications Table
Showing 7 of 7 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.
| Parameter | Value |
|---|---|
| Rated Voltage | 40.5 kV - 1100 kV |
| Porcelain Body Material | C-130 High-Strength Aluminous Porcelain |
| Cantilever Bending Strength | 10 kN - 80 kN |
| Hydraulic Pressure Test | Routine pressure test at 2.0x maximum operating pressure; confirm scope by model |
| Glaze Finish | High-Gloss Brown / Sky Grey (Anti-Pollution Semiconducting Glaze Optional) |
| Creepage Ratio | >= 31 mm/kV (Class IV Very Heavy Pollution) |
| End Flange Material | Corrosion-resistant Ductile Cast Iron / Cast Aluminum with Hot-Dip Galvanizing |
Electrical porcelain hollow insulators (11–1100 kV, flange interfaces to drawing)
| Parameter | Value |
|---|---|
| Rated Voltage | 11 kV ～ 1100 kV (AC/DC ) |
| Insulation Material | High-Quality Electrical Porcelain ( C-130) |
| External Profile | Ribbed Shed Aerodynamic Profile |
| Flange Interface | Customized Metal Flanges (Ductile Cast Iron / Aluminum Alloy) |
| Compliance Standards | IEC 62155, IEC 60168, GB/T 8287.1, IEEE C57 |
| Customization Capability | Customized dimensions, PCD bolt patterns and sealing surfaces per customer drawings |
Custom Engineering & Flange Dimensions Note:
Dimensions, interfaces and replacement compatibility require approved drawings and technical review.
High-Strength Porcelain Hollow Insulator Core Engineering Advantages
High Mechanical Rigidity
High Mechanical Rigidity: Cantilever mechanical bending strength exceeding 50kN, ensuring structural integrity under seismic and short-circuit dynamics.
Superior Surface Glazing
Superior Surface Glazing: Anti-pollution semi-conducting or high-gloss brown/grey glaze with high hydrophobicity migration.
Agree type and routine test scope, including pressure and material checks, for the specified insulator.
Agree type and routine test scope, including pressure and material checks, for the specified insulator.
Electrical porcelain construction; confirm porosity and dielectric strength against the model test plan.
Electrical porcelain construction; confirm porosity and dielectric strength against the model test plan.
Excellent electrical insulation properties
Excellent electrical insulation properties: Outstanding power frequency withstand and lightning impulse margin under high electric field stresses.
Robust structure for high-voltage applications
Robust structure for high-voltage applications: Rugged cylindrical body engineered to withstand cantilever bending, axial compression, and seismic shock.
Ribbed design to support external insulation
Ribbed design to support external insulation: Optimized deep-shed profile providing extended creepage distance for severe pollution flashover resistance.
Metal flange interfaces for equipment integration
Metal flange interfaces for equipment integration: Precision CNC turned ductile cast iron or high-strength aluminum alloy flanges for gas-tight docking.
Customized dimensions and connection configurations
Customized dimensions and connection configurations: Full engineering flexibility tailored to customer CAD drawings, interfaces, and technical specifications.
Compatible Substation Apparatus
High-Voltage SF6 Circuit Breaker InterruptersCurrent & Voltage Instrument Transformers (CT/PT)Surge Arresters & Cable TerminationsSubstation Outdoor Busbar & Switchgear BushingsGas-Insulated Switchgear (GIS)High-voltage circuit breakersInstrument transformers and other electrical equipment, subject to design requirementsHigh-voltage substations
High-Strength Porcelain Hollow Insulator Materials & Manufacturing Process
C-130 Aluminous Porcelain Core
Ceramic formulation and firing process; confirm porosity and mechanical acceptance by model.
Hot-Dip Galvanized Iron/Aluminum Flanges
Flanges cemented using Portland high-strength cement with elastic buffering gaskets.
Aluminous Electrical Porcelain (C-130 Grade)
Formulated with premium calcined bauxite, feldspar, and clay, high-temperature vitrified at 1300°C for superior flexural strength.
Precision Cast Metal Flanges
Hot-dip galvanized ductile iron or precision cast aluminum alloy, assembled with high-strength Portland cement and elastic buffer rings.
Engineering Inquiry Draft
Request Quotation for High-Strength Porcelain Hollow Insulator
Enter your requirements and send them to our sales desk. If online sending is unavailable, you get an email draft instead.
High-Strength Porcelain Hollow Insulator: FAQ
- What voltage and current range does the High-Strength Porcelain Hollow Insulator cover?
- Catalogue voltage range: 11kV ～ 1100kV; current range: Up to 6300A. Confirm the rating of the specific model and drawing.
- What insulation or construction is used?
- High-Strength Aluminous Porcelain (C-130).
- Which standards are referenced?
- Catalogue standard reference: IEC 62155 / GB/T 8287.1 / IEC 60168 / IEEE C57. Request type-test evidence for the specific model.
- Which applications is it used in?
- Circuit Breakers, CT/VT & Surge Arresters.
Applications
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