Output Terminals/Bushings: Temperature Range -40°C to +120°C

Component Specifications

Definition

Output terminals and bushings are specialized electrical components designed to safely conduct high-voltage electricity from test equipment to external circuits while providing robust insulation and mechanical support. These components feature conductive cores surrounded by insulating materials that prevent electrical leakage, corona discharge, and flashover, with threaded or bolted connections for secure attachment. They are engineered to withstand extreme electrical stresses, thermal cycling, and environmental conditions typical in high-voltage testing applications.

Working Principle

Output terminals and bushings operate by providing a controlled conductive path for high-voltage electricity through an insulating barrier. The conductive core (typically copper or aluminum alloy) carries the electrical current, while the surrounding insulating material (such as porcelain, epoxy resin, or silicone rubber) creates a high dielectric strength barrier that prevents current leakage to the ground or adjacent components. The geometry is optimized to distribute electrical field gradients evenly, minimizing corona discharge and partial discharge effects that could degrade insulation over time.

Materials

Conductive core: Oxygen-free copper (C10100/C10200) or aluminum alloy (6061-T6) with silver or tin plating for corrosion resistance. Insulation: High-alumina porcelain (Al2O3 content >95%), cycloaliphatic epoxy resin (IEEE 386 Type I/II), or high-temperature silicone rubber (VMQ). Seals: Ethylene propylene diene monomer (EPDM) or fluorocarbon (FKM) O-rings. Hardware: Stainless steel (AISI 304/316) or plated steel fasteners.

Technical Parameters

Parameter	Typical range	Notes & selection driver
IP Rating	IP54 minimum
Current Rating	10-1000 A continuous
Voltage Rating	Up to 100 kV AC / 150 kV DC
Creepage Distance	20-50 mm/kV depending on pollution degree
Partial Discharge	<5 pC at rated voltage
Temperature Range	-40°C to +120°C
Mechanical Strength	>500 N axial pull force
Insulation Resistance	>1000 MΩ at 500 V DC

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 60270, IEEE 386, IEC 62271, DIN 47636

Parent Products

This component is used in the following industrial products

High Voltage Test Module

A component of an Electrical Testing Station that generates, applies, and measures high voltage for insulation and dielectric testing.

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Engineering Analysis

Risks & Mitigation

Electrical shock hazard
Insulation failure leading to flashover
Corona discharge damaging adjacent components
Thermal runaway under continuous load
Mechanical stress cracking insulation

FMEA Triads

Trigger: Contamination accumulation on insulation surface
Failure: Surface tracking and insulation breakdown
Mitigation: Regular cleaning, use of hydrophobic coatings, adequate creepage distance design

Trigger: Thermal cycling stress
Failure: Crack formation in insulating material
Mitigation: Material selection with matched thermal expansion coefficients, stress relief design features

Trigger: Improper torque during installation
Failure: Loose connections leading to overheating or mechanical failure
Mitigation: Use calibrated torque tools, follow manufacturer specifications, implement torque audit procedures

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm on critical dimensions, ±5% on electrical specifications

Test Method

Partial discharge measurement per IEC 60270, dielectric withstand test per IEC 62271, thermal cycling test per IEEE 386

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 Output Terminals/Bushings

Manufacturer profiles associated with Output Terminals/Bushings.

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Frequently Asked Questions

What is the difference between terminals and bushings in high-voltage applications?

Terminals provide external connection points with threaded or bolted interfaces, while bushings serve as insulated feedthroughs that allow conductors to pass through grounded barriers (like equipment enclosures) without electrical contact.

How do I select the right voltage rating for output terminals?

Select terminals with a voltage rating at least 20% higher than your maximum test voltage, considering both AC and DC requirements, and verify compliance with relevant standards like IEC 60270 for partial discharge performance.

What maintenance is required for high-voltage terminals?

Regular visual inspection for cracks or tracking, cleaning of contamination, torque verification of connections, and periodic insulation resistance testing according to manufacturer recommendations.

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.

Output Terminals/Bushings