High Voltage Earthing Switch Manufacturer | Indoor Grounding Switch for Switchgear

Professional indoor earthing switch for 12kV 24kV and 40.5kV switchgear. Features robust mechanical interlocking and high short circuit making capacity.

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Reliable High Voltage Earthing Switch for MV Switchgear Panels

Safety First Indoor Grounding Switch Solutions for OEM Panel Builders and Manufacturers

Product Description

Model No.: (EK6) JN15A-12/31.5

EK6‑12/31.5 Series indoor earthing switch is an upgraded design developed on the basis of the ES1 type. It is applicable to 3–12 kV three‑phase AC 50(60) Hz power systems. Serving as earthing protection equipment, it can be installed in various medium‑voltage switchgear assemblies. The product complies with GB 1985‑2004 and IEC 129 standards. Our high voltage earthing switches are essential safety components designed for medium voltage metal clad switchgear. Engineered for rapid closing and superior short circuit making capacity, these switches ensure the safety of maintenance personnel.

Key Performance Features

Advanced Interlocking: Seamlessly integrates with the VCB and cabinet door.

Short Circuit Capacity: Designed to withstand high thermal and dynamic stresses.

Durable Construction: High strength galvanized steel frame and silver plated copper contacts.

Working condition
  • Ambient temperature: -10℃ -+40℃
  • Altitude: ≤ 1000m;
  • Relative humidity: Daily average ≤95%, Monthly average ≤ 90%;
  • Earthquake intensity: ≤8 degree;
  • Dirtiness degree: II.
Technical Parameters
No.ItemUnitData
1Rated voltageKV12
2Rated short time withstand currentKA31.5
3Rated short circuit withstand timeS4
4Rated short circuit making currentKA80
5Rated peak withstand currentKA80
6Rated insulation level1 min power frequency withstand voltageKV42
Lightning Impulse withstand voltage75
7Mechanical lifeTimes2000

Drawing

 

high voltage earthing switch manufacturer | indoor grounding switch for switchgear

SpecificationEFGHDC
EK6-12/31.5-16516575160565426
EK6-12/31.5-18018075160595456
EK6-12/31.5-20020075160635496
EK6-12/31.5-21021075160655516
EK6-12/31.5 2302307516069555696
EK6-12/31.5-2502507516073559696
EK6-12/31.5-2752757518581064696

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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