High-Voltage Terminal: Temperature Range -40°C to +85°C

Q: What is the primary function of a high-voltage terminal in a voltage divider?

It safely connects high-voltage input to the divider, ensuring accurate voltage division while preventing electrical hazards like arcing or insulation breakdown.

Q: How do I select the right high-voltage terminal for my application?

Consider voltage rating, current capacity, environmental conditions (e.g., humidity, temperature), insulation material, and compliance with standards like IEC 60243.

Q: Can high-voltage terminals be used in outdoor installations?

Yes, if designed with weather-resistant materials (e.g., silicone rubber, porcelain) and appropriate IP ratings (e.g., IP65) to withstand moisture, UV exposure, and pollution.

Component Specifications

Definition

A high-voltage terminal is a critical electrical component designed to connect high-voltage conductors to voltage measurement dividers or other equipment. It provides a secure, insulated interface that prevents electrical arcing, corona discharge, and leakage currents, while maintaining precise voltage division ratios for measurement accuracy. Typically used in power transmission, substations, and industrial high-voltage testing setups.

Working Principle

The terminal operates by providing a low-resistance, high-integrity connection point for high-voltage conductors. It incorporates insulation materials and geometric designs (e.g., smooth surfaces, rounded edges) to control electric field distribution, minimizing stress concentrations. In voltage dividers, it ensures the input high voltage is accurately divided down to a measurable low voltage without introducing significant impedance or distortion.

Materials

Conductor: Oxygen-free high-conductivity copper or aluminum alloy, often silver-plated for enhanced conductivity and corrosion resistance. Insulation: High-dielectric-strength materials such as porcelain, epoxy resin, silicone rubber, or PTFE, rated for continuous operation at specified voltages (e.g., 10 kV to 500 kV). Housing: UV-resistant polymer or composite materials for outdoor durability.

Technical Parameters

Parameter	Typical range	Notes & selection driver
IP Rating	IP65 or higher for outdoor use
Current Rating	1-10 A (depending on design)
Voltage Rating	Up to 300 kV AC/DC
Connection Type	Threaded stud, clamp, or bolted
Temperature Range	-40°C to +85°C
Dielectric Strength	Withstands 2x rated voltage for 1 minute
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

ISO 9001, IEC 60243, IEEE 48

Parent Products

This component is used in the following industrial products

Voltage Measurement Divider

A precision electrical component used to safely measure high voltages by dividing them into lower, measurable levels.

View Product Details

Spark Gap Assembly

A precision electrical component that creates a controlled spark discharge for ignition or timing purposes.

View Product Details

Engineering Analysis

Risks & Mitigation

Electrical arcing due to improper installation
Insulation degradation over time
Corona discharge at high voltages
Mechanical failure from vibration or thermal cycling

FMEA Triads

Trigger: Contamination or moisture on insulation surface
Failure: Reduced dielectric strength leading to flashover
Mitigation: Use hydrophobic coatings, regular cleaning, and design with creepage distance per IEC 60243

Trigger: Loose connection due to thermal expansion or vibration
Failure: Increased contact resistance, overheating, and potential arcing
Mitigation: Apply proper torque during installation, use lock washers, and design with spring-loaded contacts

Trigger: Material aging under UV exposure or thermal stress
Failure: Cracking or brittleness of insulation, compromising safety
Mitigation: Select UV-stable materials (e.g., HTV silicone), conduct periodic inspections, and replace per maintenance schedule

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Voltage division ratio accuracy within ±0.5% under rated conditions; insulation resistance deviation <10% from spec

Test Method

Dielectric withstand test per IEC 60243-1; partial discharge measurement per IEC 60270; thermal cycling and humidity tests per IEEE 48

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 Terminal

Manufacturer profiles associated with High-Voltage Terminal.

Sourcing High-Voltage Terminal from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

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

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Contact Plate

A conductive plate in motor terminal blocks that establishes electrical contact between conductors.

Marking Strip

A durable marking strip used for terminal identification in motor terminal blocks to ensure proper electrical connections and safety compliance.

Gland Body

A gland body is the main housing component of an aluminum cable gland that provides mechanical protection and environmental sealing for electrical cables entering enclosures.

Current Sense Resistor

A precision resistor used to measure current flow in electrical circuits by converting current to a measurable voltage drop.

Frequently Asked Questions

What is the primary function of a high-voltage terminal in a voltage divider?