INDUSTRY COMPONENT

Primary Conductor Pass-through

Insulated pass-through component for primary conductors in differential current transformers

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Component Specifications

Definition
A specialized electrical insulation component designed to safely pass primary conductors through the magnetic core of a differential current transformer while maintaining electrical isolation, preventing short circuits, and ensuring accurate current measurement by containing the magnetic field within the transformer structure.
Working Principle
Provides a controlled path for primary conductors to pass through the transformer's magnetic core aperture while maintaining dielectric strength and preventing eddy current losses through proper insulation and material selection, ensuring the primary current induces a proportional secondary current without interference.
Materials
High-grade electrical insulating materials such as epoxy resin, porcelain, or silicone rubber with flame-retardant properties; may include embedded metallic shielding or grading rings for high-voltage applications; rated for continuous operation at specified temperature classes (e.g., Class F: 155°C).
Technical Parameters
  • IP Rating IP65 or higher
  • Rated Current 100 A to 5000 A
  • Rated Voltage Up to 36 kV
  • Creepage Distance ≥20 mm/kV
  • Dielectric Strength Withstands 2*Un + 1 kV for 1 minute
  • Insulation Resistance >1000 MΩ at 500 V DC
  • Operating Temperature -40°C to +155°C
Standards
IEC 61869, IEEE C57.13, DIN EN 60044

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Primary Conductor Pass-through.

primary conductor pass-through differential current transformer electrical insulation high-voltage insulation current transformer component IEC 61869 Primary Conductor Pass-through in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Differential Current Transformer

A current transformer that measures the difference between currents in two conductors, used for ground fault detection.

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Engineering Analysis

Risks & Mitigation
  • Electrical insulation failure leading to short circuits
  • Thermal degradation under overload conditions
  • Mechanical damage during installation
FMEA Triads
Trigger: Contamination or moisture ingress
Failure: Reduced insulation resistance and dielectric breakdown
Mitigation: Use sealed designs with desiccants and regular insulation testing
Trigger: Overcurrent or thermal cycling
Failure: Material cracking or delamination
Mitigation: Implement temperature monitoring and adhere to rated current limits
Trigger: Improper installation alignment
Failure: Mechanical stress on conductors or insulation
Mitigation: Follow manufacturer torque specifications and alignment guides

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5% for accuracy class 0.5, ±1% for class 1 per IEC 61869
Test Method
Partial discharge testing, dielectric withstand test, insulation resistance measurement

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the main function of a primary conductor pass-through?

It safely insulates the primary conductor as it passes through the transformer core, preventing electrical faults and ensuring accurate current measurement.

Can it be used in outdoor environments?

Yes, if designed with appropriate IP ratings and UV-resistant materials for outdoor durability.

How does it affect transformer accuracy?

Proper design minimizes magnetic field distortion and eddy currents, maintaining measurement accuracy per IEC 61869 standards.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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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