F10-8 III LD 8-Pole Rotary Auxiliary Contact Switch for Switchgear

The F10-8 III LD auxiliary contact switch is a compact 8-pole rotary auxiliary contact switch engineered for high-voltage switchgear, ideal for power substations and industrial power systems, delivering reliable position signal switching.

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F10-8 III LD 8-Pole Rotary Auxiliary Contact Switch for Switchgear

Product Description

Model: F10-8 III/LD
  • Core Application Scenarios: Designed as a dedicated F10-8 III/LD auxiliary switch for 12kV–40.5kV high-voltage switchgear and circuit breakers, widely used in power distribution substations, industrial power plants, and electrical equipment manufacturing projects.
  • Key Rotary Operation Function: Acts as a rotary auxiliary contact switch to provide precise 8-pole signal switching and position feedback, ensuring reliable monitoring of circuit breaker test/working positions during maintenance and power system switching.
  • Compact & Durable Design: Robust cast metal housing and rotary mechanism ensure long mechanical life, suitable for repeated operation in harsh industrial and substation environments.
  • Multi-Pole Signal Control: 8-pole structure meets complex secondary control signal requirements, ideal for large-scale power grid automation and industrial power distribution systems.
  • Easy Installation & Compatibility: Standard mounting interface seamlessly integrates with most switchgear and circuit breaker designs, making it a preferred switchgear auxiliary switch for electrical integrators and utility companies.
  • Safety & Compliance: Conforms to IEC 60947-5-1 standards, with stable electrical performance to prevent signal errors in critical power transmission scenarios.

Working conditions

  • The altitude does not exceed 3000 meters;
  • Ambient temperature:-40℃ ~ +40℃;
  • Relative humidity: the daily average value is not greater than 95%, the monthly average value is not greater than 90%, the vibration acceleration is not greater than 15 m/s²;
  • The surrounding medium has no explosion hazard, no conductive dust, no damaged insulation and no gas place that corrodes metal.

Technical Parameters

TermDC 110VDC 220VAC 220V/380V
Rated voltage (V)110220220, 380
Rated current (A)6510
Rated maximum breaking current (A)6510
Time constant  t=20ms220V, cosΦ=0.4
Life times200002000020000

 

F10 series auxiliary switch contact numbers

Number12345678910
Contact number (normally open)1–35–79–1113–1517–1921–2325–2729–3133–3537–39
Contact number (normally closed)2–46–810–1214–1618–2022–2426–2830–3234–3638–40
  • Classification of aluminum color (silver gray, white), electroplating process (silver plating, gold plating)
  • Can be customized according to customer needs.

Order information

  1. Product name, model, quantity
  2. Indicate the number of contact pairs and switch joints, type and installation method
  3. Whether to choose connection accessories
  4. If the user has other special requirements, please explain

F10-8 III LD 8-Pole Rotary Auxiliary Contact Switch

Drawing

f10 8 iii/ld auxiliary switch | 8 pole rotary auxiliary contact switch for switchgear

Technical Support & FAQs

Our products are designed and manufactured in strict compliance with major international standards, including IEC 62271-100, IEC 62271-200 and IEEE C37.04 standards. All products are inspected by our Quality Control department.

We specialize in the medium-voltage range. Our vacuum circuit breakers and switchgear components are suitable for rated voltages from 7.2kV to 40.5kV. The normal current rating covers up to 4000A, and the short-circuit breaking capacity can be designed up to 40kA or higher to meet the demands of various applications, from simple distribution to heavy industrial use.

 Yes, customization is one of our core strengths. We understand that compatibility with existing equipment is critical. We offer OEM and ODM services and can customize components (like brackets, linkages, shutters) and modify breakers to be compatible with major switchgear brands such as Siemens, ABB, Schneider, GE, and others. Please provide your technical drawings or specifications for a precise solution.

Our quality assurance is embedded in every step of the process:

Material Sourcing: We use premium-grade raw materials and components from certified suppliers.

Manufacturing: Advanced CNC machinery and automated production lines ensure precision and consistency.

Testing: 100% routine tests (e.g., contact resistance, mechanical operation, HV withstand) are performed on every unit. We also conduct destructive and non-destructive tests on samples.

For standard products, our lead time is typically 1-4 weeks. For large or customized orders, the lead time will be confirmed based on the project's complexity and quantity.

Certainly. We provide comprehensive pre-sales and after-sales technical support. Our team of engineers can assist with product selection, technical drawings. We also offer detailed documentation, including manuals and drawings. In the rare event of an issue, we provide remote troubleshooting and have a efficient warranty claim process.

Our vacuum circuit breakers are engineered for superior performance and reliability, offering these key benefits:

High Breaking Capacity: Advanced vacuum interrupter technology ensures reliable interruption of high short-circuit currents.

Long Electrical and Mechanical Life: Designed for thousands of operations with minimal maintenance, significantly reducing life cycle costs.

Maintenance-Free Operation: The sealed vacuum interrupters eliminate the need for regular maintenance of the quenching medium, unlike oil or SF6 breakers.

Safety and Environmental Friendliness: They operate silently, are fire-safe, and contain no greenhouse gases (SF6), making them an eco-friendly choice.

Compact Design: Allows for space-saving switchgear designs, which is ideal for retrofitting or modernizing existing substations.

Our products are designed for global deployment. Please specify your environmental conditions for the most suitable product recommendation.

We stand behind our products with a standard 12-month warranty from the date of shipment, covering any defects in materials or workmanship under normal use and service conditions. Our warranty terms are clearly stated in our commercial contract.

 You can request a quote easily by clicking the Contact Us or  Request a Quote button. To provide you with the most accurate and competitive quotation, please have the following information ready:

Product name and model number (if known)

Technical specifications (such as Rated Voltage, Current, Short-circuit breaking current, etc.)

Quantity required

Any special requirements (customization, etc.)

Why Choose Us

technical support

Technical Support

From pre-sales consultation to after-sales service, we offer end-to-end technical support to maximize your project success. Our experts assist with product selection, system integration, troubleshooting, and maintenance, backed by continuous project tracking to keep your operations smooth and efficient.

customized solutions

Customized Solutions

We specialize in tailor-made solutions for switchgear and components, designed to fit your unique requirements. Our team collaborates closely with you to develop products optimized for performance, efficiency, and reliability—ensuring they excel in your specific application.

quality control

Quality Control

Quality is embedded at every stage. We rigorously test all materials prior to production and monitor manufacturing processes to ensure product stability. Before shipment, each unit undergoes comprehensive electrical, mechanical, and safety performance tests to comply with industry standards.

quick response (2) compressed

Quick Response

Our experienced service team provides 24/7 support year-round. Thanks to streamlined processes and a dedicated staff, we deliver 90% of quotations within 24 hours.

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