GN30-12 Indoor HV Isolator Switch | 12kV Rotary Disconnector

In any high-voltage power system, isolator switches play a crucial safety role. They serve not only as reliable isolation points during equipment maintenance and inspection but also as the primary defense mechanism to ensure the safety of operating personnel and the integrity of equipment. Weisho Electric is proud to introduce its GN30-12/1250A-31.5A Indoor High-Voltage Isolator Switch, specifically designed for 12kV AC 50Hz power systems.

The GN30 series Isolator switches are renowned for their unique rotary structure and excellent performance, providing a clear visible isolating gap to ensure effective isolation of high-voltage circuits during abnormal operations or maintenance. Weisho Electric's GN30-12, leveraging our 12 years of exquisite craftsmanship and stringent quality control in high-voltage switchgear manufacturing, ensures high reliability, ease of operation, and a long service life. It is widely applied in various high-voltage switchgear cabinets, power distribution rooms, and industrial substations, offering robust protection for the safe and stable operation of power systems.

Core Advantages & Features: Ensuring Ultimate Reliability in Electrical Isolation

The Weisho Electric GN30-12 Indoor High-Voltage Isolator Switch delivers the following core advantages to your high-voltage power distribution system, thanks to its superior design and manufacturing standards:

1. Unique Rotary Structure for Reliable Isolation:

Technical Detail: Employs a three-phase ganged rotary blade design, where the blades rotate to perform opening and closing operations, providing a clear visible air insulation gap when open. Its compact structure reduces operating torque, ensuring smooth and reliable switching.
Key Benefit: Ensures that during equipment maintenance, operators can visually confirm complete power isolation, thereby significantly reducing the risk of misoperation and electrical shock, and providing the highest level of personnel and equipment safety.

2. High-Performance Contact System for Superior Conductivity:

Technical Detail: Main contacts utilize high-quality conductive materials with a thick silver plating on the surface, guaranteeing extremely low contact resistance and excellent conductivity. The unique contact structure ensures tight and stable contact when closed, allowing reliable passage of rated current and short-circuit fault currents over long periods.
Key Benefit: Effectively reduces temperature rise and energy loss during operation, enhancing equipment efficiency and reliability. Its stability and durability ensure a long lifespan for the equipment under various operating conditions.

3. Robust Durability & Extended Mechanical Life:

Technical Detail: Key components are made from high-strength metal materials, with special surface treatments to enhance corrosion resistance and mechanical strength. The operating mechanism is precisely engineered to ensure smooth mechanical operation and a long service life, meeting requirements for frequent operations.
Key Benefit: Guarantees the high reliability of the isolator switch during frequent operations and long-term service, reducing failure rates and lowering maintenance costs, making it suitable for applications demanding high operational stability.

4. Comprehensive Anti-Misoperation Interlocking Mechanism:

Technical Detail: The GN30-12 Isolator switch supports reliable mechanical interlocking with circuit breakers and grounding switches. This interlocking system strictly adheres to the "Five Preventions" requirements, ensuring the unique and correct sequence of operations.
Key Benefit: Fundamentally eliminates severe misoperations in high-voltage operations, such as "disconnecting under load" or "closing with ground attached," minimizing safety risks and serving as an indispensable safeguard for the safe operation of power systems.

5. Compact Design & Flexible Installation:

Advantage: The GN30-12 features a compact structure, occupying minimal space, allowing for efficient utilization of internal switchgear space. It supports both vertical and horizontal installation, adapting to various switchgear structural layouts.
Key Benefit: Simplifies on-site wiring and construction, improving installation efficiency and convenience, and providing greater design flexibility for users in switchgear design and modification.

Applications: Safeguarding Power Safety Across Diverse Sectors

The Weisho Electric GN30-12 Indoor High-Voltage Isolator Switch is widely applied in various 12kV and below high-voltage power systems, providing reliable isolation protection for electrical equipment and operating personnel:

High-Voltage Switchgear (e.g., KYN28, GZS1 series): Serves as a critical isolation component for incoming lines, outgoing lines, bypasses, bus sectioning, and other circuits, ensuring safe maintenance of equipment within the switchgear.
Industrial Substations & Power Distribution Rooms: Provides reliable isolation points for high-voltage equipment such within factories and industrial enterprises, such as transformers and motors, facilitating routine maintenance and fault handling.
Urban & Rural Power Distribution Networks: Used for sectioning, branching, or power source isolation in ring main units and compact substations, enhancing the reliability and maintainability of the power distribution network.
Power Plant Auxiliary Systems: Employed for high-voltage isolation protection in generator sets and plant auxiliary power systems.
Data Centers & Large Commercial Buildings: Acts as a critical maintenance isolation point within their high-voltage distribution units, ensuring power supply continuity and personnel safety.

Technical Specifications & Standard Compliance

The Weisho Electric GN30-12 Indoor High-Voltage Isolator Switch strictly adheres to relevant international and domestic standards, ensuring its excellent performance and reliability.

Environmental Conditions

No.	Item	Value
1	Extreme Max. Air Temperature (°C)	40
2	Extreme Min. Air Temperature (°C)	-25
3	Altitude (m)	＜1000
4	Seismic Intensity (China 12-grade standard)	6
5	Basic Seismic Acceleration Value	0.05
6	Pollution Level	e
7	Creepage Distance	≥ 1.6 cm/kV

Main Electrical & Mechanical Parameters (GN30-12)

Parameter	Value/Description
Electrical Parameters
Rated Voltage	12kV
Rated Current	630A, 1000A, 1250A, 1600A, 2000A, 2500A, 3150A (depending on model)
Rated Short-Time Withstand Current (Ith)	31.5kA (4s)
Rated Peak Withstand Current (Ip)	80kA
Mechanical Parameters
Mechanical Endurance	≥ 2000 operations
Operating Mechanism	CS6 Manual Operating Mechanism (or other compatible mechanisms, e.g., motorized)
Insulation Level	Complies with GB1985-2004, IEC62271-102 standards

Quality Assurance & Authoritative Certifications

At Weisho Electric, our commitment to product quality is our cornerstone. The GN30-12 Indoor High-Voltage Isolator Switch undergoes rigorous testing and adheres to stringent international quality management systems and industry standards, from raw material selection to manufacturing.

ISO 9001 Quality Management System Certification: Ensures that every stage, from raw material procurement to the production process, meets the highest quality standards.
IEC 62271-102 Standard Compliance: Our product design and testing strictly conform to the International Electrotechnical Commission's standards for disconnectors and earthing switches, ensuring global compatibility and reliability.
China Compulsory Certification (CCC)
CE Certification (Conformité Européenne)

Every Weisho Electric GN30-12 isolator switch undergoes rigorous performance testing and quality inspection before leaving the factory, ensuring its reliable and safe electrical isolation under all operating conditions.

Installation & Maintenance: Simple, Efficient, and Ensuring Long-Term Operation

The Weisho Electric GN30-12 Indoor High-Voltage Isolator Switch is designed for straightforward installation, suitable for various high-voltage switchgear cabinets. We provide detailed installation guides and professional technical support to ensure safe and efficient commissioning of the equipment. Its high reliability and maintenance-free design characteristics also significantly reduce the frequency and cost of routine maintenance.

Customer Testimonials: Professional, Trustworthy

Hear what our global customers have to say about Weisho Electric's GN30-12 Indoor High-Voltage Isolator Switch:

"We selected Weisho Electric's GN30-12 Isolator switch for an industrial power distribution project in Texas, USA. This product not only perfectly fit our switchgear design, but its smooth operation and reliable isolation performance also far exceeded our expectations, providing robust safety assurance for on-site maintenance work."

— John R. Davis, Senior Project Manager, US Electrical Engineering Company

"In a commercial building upgrade project in London, UK, the high quality and ease of installation of the GN30-12 Isolator switch deeply impressed us. The technical support provided by Weisho Electric was incredibly prompt and professional, ensuring the successful completion of the project. We are highly satisfied with their products and services."

— Lena Miller, Electrical Supervisor, UK Facilities Management Group

"Weisho Electric's GN30-12 Isolator switch has performed exceptionally well in a power distribution substation in Germany's Ruhr region. Its short-circuit withstand capability and mechanical endurance are outstanding, which is crucial for ensuring the long-term stable operation of the power system. As a European market client, we highly recognize Weisho Electric's product quality."

— Klaus Schmidt, Operations Director, German Energy Services Company

Expert Insight: Content Authored by Industry Professional

The detailed content on this page regarding the GN30-12 Indoor High-Voltage Isolator Switch is proudly presented by Engineer Thor from Weisho Electric.

Mr. Thor is a key technical backbone at Weisho Electric Co., Ltd., a prominent Chinese foreign trade manufacturer dedicated to serving clients across Europe, the Americas, the Middle East, Belt and Road Initiative countries, and globally. With 12 years of invaluable industry experience, he specializes in high-voltage switchgear (including Isolator switches) R&D, design, and application, possessing a profound understanding and practical expertise in product technology, industry standards, and customer requirements.

Should you have any inquiries about our GN30-12 Indoor High-Voltage Isolator Switch or require professional, customized solutions, please feel free to contact Thor:

Phone: +86-577-62788197
WhatsApp: +86 159 5777 0984
Email: thor@weishoelec.com

Enhance Your Power System's Safety Today with Weisho Electric's GN30-12 Indoor High-Voltage Isolator Switch!

Contact our expert team for a personalized consultation, detailed technical specifications, or to request a comprehensive quote. Let us help you build a safe and reliable power infrastructure for your project!