INDUSTRY COMPONENT

Insulation Body

High-voltage insulation body for cable terminations providing electrical isolation and environmental protection.

Component Specifications

Definition
The insulation body is a critical component in high-voltage insulated cable terminations, designed to provide reliable electrical insulation between the cable conductor and the surrounding environment. It prevents electrical discharge, corona formation, and flashover by maintaining dielectric strength under high voltage stress, while also offering mechanical support and environmental sealing against moisture, contaminants, and UV radiation.
Working Principle
Works by utilizing high-dielectric-strength materials to create a barrier that withstands electrical potential differences, distributing electric field stress evenly to prevent localized breakdown, and providing a controlled interface between the cable and termination hardware.
Materials
High-performance polymer composites such as silicone rubber (HTV/RTV), ethylene propylene diene monomer (EPDM), or epoxy resin with inorganic fillers (e.g., alumina trihydrate) for tracking resistance. Material must have high dielectric strength (>20 kV/mm), excellent hydrophobicity, UV stability, and thermal resistance (typically -50°C to +150°C).
Technical Parameters
ParameterTypical rangeNotes & selection driver
IP RatingIP68 for submersible applications
Voltage RatingUp to 36 kV (common), higher for specialized applications
Leakage Current<1 μA at rated voltage
Creepage DistanceDesigned per IEC 60815 for pollution severity
Temperature Range-50°C to +150°C
Dielectric Strength>20 kV/mm
Tracking ResistanceCTI ≥ 600 V

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
IEC 60502, IEC 60840, IEEE 48, DIN VDE 0278

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Electrical breakdown due to contamination
  • Partial discharge leading to insulation failure
  • Thermal runaway under overload conditions
  • Mechanical damage during installation
  • Material degradation from UV/ozone exposure
FMEA Triads
Trigger: Surface contamination (dust, salt, moisture)
Failure: Surface tracking and flashover
Mitigation: Regular cleaning, use of hydrophobic materials, adequate creepage distance design
Trigger: Internal voids or impurities in material
Failure: Partial discharge and electrical treeing
Mitigation: Strict quality control during manufacturing, vacuum casting processes, material testing per IEC 60243
Trigger: Over-tightening during installation
Failure: Mechanical stress cracking
Mitigation: Use of torque wrenches, proper installation training, stress-relief designs

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Dimensional tolerance ±0.5 mm on critical interfaces, dielectric strength tolerance +0/-10% of rated value
Test Method
Partial discharge test (<5 pC at 1.5× rated voltage), power frequency withstand test, impulse withstand test, tracking resistance test per IEC 60587

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Insulation Body

Manufacturer profiles associated with Insulation Body.

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Frequently Asked Questions

What is the primary function of an insulation body in cable terminations?

To provide electrical isolation between the energized conductor and ground, prevent surface tracking and flashover, and protect against environmental factors like moisture and contamination.

How do you select the right insulation body material?

Based on voltage rating, environmental conditions (pollution level, UV exposure, temperature extremes), mechanical requirements, and compatibility with cable insulation material (XLPE, EPR, etc.).

What are common failure modes of insulation bodies?

Surface tracking due to contamination, electrical treeing from voids or impurities, thermal degradation from overload, mechanical damage during installation, and loss of hydrophobicity.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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