Editorial Technical Reference

Adjustable Electrode

This page explains how Adjustable Electrode is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A movable electrode component within a spark gap assembly that allows precise adjustment of the gap distance between electrodes.

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Adjustable Electrode in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Adjustable Electrode

Definition
An adjustable electrode is a critical component of a spark gap assembly designed to control the distance between electrodes. It enables fine-tuning of the spark gap to regulate voltage breakdown characteristics, optimize electrical discharge performance, and accommodate different operating conditions. This adjustability ensures consistent spark generation, improves system reliability, and allows for maintenance and calibration. The electrode is typically made from materials such as copper, tungsten, molybdenum, or stainless steel, selected for their electrical and thermal properties. The adjustment mechanism may involve screw threads, sliding mechanisms, or positioning screws, allowing precise setting of the gap distance. The adjustment range is typically 0.5 to 5.0 mm, with a precision of ±0.02 mm. The rated voltage for insulation is 1 to 36 kV, and the rated current for short-circuit capability is 10 to 50 kA. The operating temperature range is -40 to 85 °C, and the operating pressure for gas-insulated systems is 0.1 to 0.6 MPa. The relative humidity range is 5 to 95% non-condensing, and the ingress protection rating is IP54 to IP65. The material grade for copper alloy is C3604, and the weight ranges from 0.5 to 2.0 kg depending on size. These values are reference ranges and must be verified for the specific model and application. The adjustable electrode is used in various electrical equipment, including surge arresters, ignition systems, and high-voltage test equipment. Proper adjustment is essential for reliable operation, and regular maintenance is required to ensure consistent performance. Always consult the manufacturer or supplier for model-specific specifications and compliance with relevant standards.
Working Principle
The adjustable electrode moves mechanically, typically via screw threads, sliding mechanisms, or positioning screws, to change its distance from the opposing electrode. This adjustment alters the electric field strength between electrodes, determining the voltage required to initiate a spark discharge across the gap. Proper gap setting ensures reliable sparking at specified voltages while preventing unwanted arcing or insulation breakdown. The electrode's position can be fine-tuned to achieve the desired breakdown voltage, which is critical for applications such as overvoltage protection and spark generation. The mechanical movement allows for precise control, and the electrode's material and surface condition influence the discharge characteristics. Regular adjustment may be needed to compensate for electrode wear or changes in operating conditions.
Common Materials
Copper, Tungsten, Molybdenum, Stainless Steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Adjustment Range0.5–5.0 mmGap distance for spark gap
Adjustment Precision±0.02 mmRepeatability of gap setting
Rated Voltage1–36 kVWithstand voltage for insulationIEC 60071
Rated Current10–50 kAShort-circuit current capabilityIEC 62271
Operating Temperature-40–85 °CAmbient temperature rangeIEC 60068-2-1
Operating Pressure0.1–0.6 MPaFor gas-insulated systems
Relative Humidity5–95 %Non-condensingIEC 60068-2-78
Ingress ProtectionIP54–IP65Dust and water resistanceIEC 60529
Material GradeC3604Copper alloy for electrodeJIS H3250
Weight0.5–2.0 kgDepending on size

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

Components / BOM
  • Electrode Tip Part
    Contact point where electrical discharge occurs
    Material: Tungsten or Copper
  • Adjustment Screw Part
    Mechanism for precise positioning of electrode
    Material: Stainless Steel
  • Locking Nut Part
    Secures electrode position after adjustment
    Material: Steel
  • Insulating Sleeve Part
    Prevents electrical leakage along adjustment mechanism
    Material: Ceramic or High-Temperature Plastic

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 10 bar
other spec: Gap adjustment range: 0.1mm to 10mm, Insulation resistance: >100 MΩ at 500V DC
temperature: -40°C to 150°C
Media Compatibility
✓ Inert gases (Argon, Nitrogen) ✓ Dry air ✓ Non-conductive dielectric fluids
Unsuitable: Corrosive or conductive environments (e.g., salt spray, acidic vapors)
Sizing Data Required
  • Required spark gap distance range
  • Operating voltage and current
  • Electrode material compatibility with media

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Contact surface degradation
Cause: Oxidation and pitting due to arcing, improper material selection for operating environment, or contamination from process fluids
Mechanical adjustment failure
Cause: Thread wear or seizing from thermal cycling, corrosion of adjustment mechanisms, or inadequate lubrication in adjustment components
Maintenance Indicators
  • Irregular or unstable electrical output readings during operation
  • Visible sparking or arcing beyond normal operational parameters at electrode contact points
Engineering Tips
  • Implement regular contact resistance testing and cleaning protocols using appropriate non-abrasive methods to maintain optimal surface conductivity
  • Establish preventive maintenance schedules for adjustment mechanisms including proper lubrication and inspection for thermal expansion compatibility

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ANSI/ASME B46.1 - Surface texture DIN 8580 - Manufacturing processes

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: +/-0.01mm
  • Parallelism: 0.05mm per 100mm length
Quality Inspection
  • Dimensional verification with CMM
  • Electrical conductivity test
Technical documentation
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Manufacturing capability
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Inspection readiness
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Manufacturers of Adjustable Electrode

Manufacturer profiles associated with Adjustable Electrode.

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Frequently Asked Questions

What is the typical adjustment range for an adjustable electrode?

The adjustment range is typically 0.5 to 5.0 mm, but this is a reference range. The exact range depends on the specific model and application. Always verify with the manufacturer or supplier.

What materials are commonly used for adjustable electrodes?

Common materials include copper, tungsten, molybdenum, and stainless steel. The material grade for copper alloy is C3604, but other grades may be used. Confirm the material for your specific electrode.

What standards apply to adjustable electrodes?

Relevant standards include IEC 60071 for insulation coordination, IEC 62271 for high-voltage switchgear, and others for environmental conditions. These standards are references for verification, not proof of compliance. Check with the manufacturer.

How often should the electrode gap be adjusted?

Adjustment frequency depends on usage and wear. Regular maintenance is recommended to ensure consistent sparking. Monitor performance and adjust as needed. Follow the manufacturer's maintenance guidelines.

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

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Spark Gap Assembly
View system integration details

Industrial Ecosystem & Supply Chain Structure

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Adjustable Electrode.

Movable Electrode Positionable Electrode

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

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 · Page last updated 12 October 2026

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