High-Voltage Insulation: Volume Resistivity ≥10^12 Ω·cm

Q: What is the primary function of high-voltage insulation in transformers?

To prevent electrical breakdown and leakage between windings and core, ensuring safe operation and longevity by withstanding voltage stresses and environmental factors.

Q: How is insulation performance tested?

Through dielectric strength tests per IEC 60243, partial discharge measurements, and tracking resistance tests to verify compliance with safety standards.

Component Specifications

Definition

A specialized electrical insulation component designed to withstand high voltage differentials in transformers and inverters, preventing electrical discharge, arcing, and current leakage between conductive parts. It maintains dielectric strength under operational stresses including thermal cycling, mechanical vibration, and environmental exposure.

Working Principle

Operates by providing a high-resistance barrier between conductors at different electrical potentials, using dielectric materials to contain electric fields and prevent breakdown. It manages capacitive coupling and dissipates partial discharge energy to maintain insulation integrity.

Materials

Typically composed of epoxy resin composites, silicone rubber, porcelain, or glass-reinforced polymers with additives for tracking resistance, thermal stability up to 180°C, and hydrophobic properties. May include mica paper or aramid fiber layers for enhanced dielectric strength.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Creepage Distance	As per IEC 60664-1
Volume Resistivity	≥10^12 Ω·cm
Dielectric Strength	≥30 kV/mm
Operating Temperature	-40°C to +180°C
Partial Discharge Level	<5 pC at 1.5x rated voltage
Comparative Tracking Index	≥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 60243, IEC 60664-1, ASTM D149, ISO 6722

Parent Products

This component is used in the following industrial products

Main Transformer / Inverter

Core electrical component within a plasma power supply that transforms and inverts electrical power to generate and regulate the high-voltage, high-frequency output required for plasma generation.

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Engineering Analysis

Risks & Mitigation

Dielectric breakdown due to contamination
Thermal degradation from overload
Mechanical damage during installation
Partial discharge leading to insulation failure

FMEA Triads

Trigger: Contamination by dust or moisture
Failure: Reduced dielectric strength leading to arcing
Mitigation: Regular cleaning, use of hydrophobic materials, and sealed enclosures

Trigger: Thermal overstress from excessive current
Failure: Material degradation and loss of insulation properties
Mitigation: Thermal monitoring, adequate cooling systems, and material selection for high-temperature stability

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5% on dielectric strength, dimensional tolerances per ISO 2768-m

Test Method

Dielectric withstand test per IEC 60243-1, partial discharge test per IEC 60270, thermal cycling test per IEC 60068-2-14

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 High-Voltage Insulation

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Wrindu

Shanghai, CN

Also makes: Circuit Breaker/Switch, Portable Digital Multimeter, Surge Protection Device and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What is the primary function of high-voltage insulation in transformers?