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Isolator in Substation
The Isolator in Substation product series, represented by the flagship GW4 Outdoor Isolation Switch, is engineered for high-voltage electrical isolation and switching in 35-110kV substations. Designed for three-phase AC 50Hz outdoor environments, this series delivers reliable performance in critical scenarios such as no-load line switching, electrical isolation of live equipment (e.g., busbars, circuit breakers), and safe maintenance operations. Key models (GW4-40.5, 72.5, 126, 145kV) cover a wide range of rated voltages (40.5kV–145kV) and currents (630A–4000A), with robust features including.
Why Choose
CNC's GW4 Isolator in Substation
GW4 outdoor MV isolation switch is suitable for three-phase AC 50Hz outdoor high-voltage electrical equipment in 35-110kV substations, with rated voltage 40.5kV-145kV and rated current 630A-4000A.
Provides safety-compliant insulation distance when the knife is in open position;
Ambient temperature adaptation: -30℃~+40℃, altitude ≤3000m, wind speed ≤35m/s;
Withstands earthquake intensity ≤8 degrees and pollution level ≤III class;
Rated short-time withstand current 20kA-46kA, peak withstand voltage 185kV-750kV.
About CNC Electric
CNC Electric was founded in 1988 with the launch of our inaugural molded case circuit breakers — marking the beginning of our journey in power solutions. With a focus on product development and manufacturing, we reorganized into a corporate group by 1995 and introduced our first full low-voltage series, earning a reputation for rugged reliability.
Many of our products are CE, TUV, and RoHS certified, ensuring reliability and compliance. We focus on both efficient production and environmental responsibility, integrating sustainable practices into our processes.
Solution
We provide our customer with profitable growth by offering integrated comprehensive electrical solution.
Bulk Wholesale
Global supply chain support with competitive pricing for large quantity orders. Dedicated account managers and flexible delivery terms.
WhatsApp: +8618958711903 E-mail: [email protected]OEM Partnership
Custom manufacturing solutions tailored to your brand requirements with strict quality control and confidential production.
Dealer Network
Join our global dealer program with exclusive territories, marketing support, and technical training resources.
Relevant Case
Angola's Natural Gas Processing Plant Project
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Nikopol Ferroalloy Plant Electrical Upgrade
Nikopol Ferroalloy Plant Upgrade
Project Introduction for Bulgarian Factory Electrical Project
FAQ
What is the function of an isolator?
Isolators isolate live electrical equipment from power sources, creating a visible break to ensure safe maintenance and prevent accidental energization.
Why is an isolator used in a substation?
Substations use isolators to safely disconnect high-voltage components (e.g., busbars, circuit breakers) during maintenance, enabling no-load line switching and enhancing operational safety.
How do isolators work?
Isolators operate via manual/mechanical mechanisms to open/close contacts, forming an insulation gap that electrically separates circuits under no-load conditions.
What is an insulator in a substation?
Insulators are devices (e.g., porcelain/composite) that support live conductors while preventing current leakage to ground, ensuring electrical insulation in substations.
What certifications do your contactors have?
Our contactors comply with international safety standards and mainstream certifications for global markets.
Do you support OEM/ODM services?
Yes, we offer OEM/ODM customization for contactors, including branding, specifications, and design tailored to client needs.
What is the lead time for contactor orders?
Lead time varies by region and order volume; contact our team for a detailed quote based on your location.
How to find local contactor distributors?
Please reach out to our sales team via [contact email/phone] for authorized distributor information in your region.
CNC=CREATE+NEW+CENTURY
Hi, I run a business in Portugal and I’m interested in bringing CNC Electric to my market. Do you already have a distributor here? If not, I’d love to explore the possibility of working together as a distributor.
Could you share some details on pricing, logistics support, and any certification requirements? Also, do you offer exclusive distribution agreements?
——Gonçalo Batalha
Olá, tenho uma empresa em Portugal e estou interessado em trazer a CNC Electric para o meu mercado. Vocês já têm um distribuidor aqui? Caso contrário, gostaria de explorar a possibilidade de trabalhar como distribuidor.
Poderiam compartilhar detalhes sobre a política de preços, suporte logístico e requisitos de certificação? Além disso, oferecem acordos de distribuição exclusiva?
——Gonçalo Batalha
Dear CNC Electric Team, This is Abdulrahman Al-Faisal,Business Development Manager in ABC company based in Riyadh Saudi Arabia, and We are looking for an OEM partner for LV components and as I know CNC Electric is a reputed and high-quality products manufacturer.
I would like to have an online meeting with you to introduce our company and business models so if you are interested we will visit your factory to complete a mutual assessment and move forward with cooperation as per the agreed business model——Abdulrahman Al-Faisal
Dear CNC Electric Team,We are a panel builder integrator and are looking for reliable low-voltage electrical components. Have you supplied solutions for projects in data center before?If so, could you share some case studies or references of similar projects? We would like to evaluate how CNC Electric products perform in real-world applications before making a purchasing decision.——Ivan Petrov
Здравствуйте, наша компания занимается производством плат для ЦОД в России. Мы ищем надежного поставщика низковольтного оборудования. Есть ли у вас реализованные проекты в сфере центров обработки данных? Если да, можете ли вы привести примеры или ссылки? Мы хотели увидеть, как продукция CNC Electric работает в реальных условиях. —— Иван Петров
Dear CNC Electric Team, We’re bidding for the Kenya National Grid Expansion Project, and your products align with the technical requirements in the tender.
Could you share the necessary certifications, technical datasheets, and details on after-sales support? Also, do you offer any special commercial support for large-scale government projects in Africa?
——Joseph Otieno
Dear CNC Electric Team, We are a renewable energy company based in Brazil, specializing in solar power projects for industrial and commercial applications. We’re looking for reliable electrical solutions for our photovoltaic installations.
Does CNC Electric offer DC MCB, MCCB, RCCB, or fuses designed for solar applications? Additionally, do you provide technical support, local certifications, or customized solutions for large-scale solar projects? If you have any successful case studies in this sector, we’d love to review them.
——Lucas Oliveira
Olá, Somos uma empresa de energia renovável com sede no Brasil, especializada em projetos solares para aplicações industriais e comerciais. Estamos em busca de soluções elétricas confiáveis para nossas instalações fotovoltaicas.
A CNC Electric oferece disjuntores DC MCB, MCCB, RCCB ou fusíveis projetados para aplicações solares? Além disso, vocês fornecem suporte técnico, certificações locais ou soluções personalizadas para projetos solares de grande escala? Se tiverem estudos de caso bem-sucedidos nesse setor, gostaríamos de analisá-los.
——Lucas Oliveira
I'm interested in using CNC Electric products for our electrical installation projects. I’m especially keen to learn more about the wifi breaker—how it works, its technical specs, and pricing details. Could you share your product catalog, price list, and any information on current stock availability? Also, do you offer any technical support or training for installation?
——Miguel Sánchez
Hola,Soy instalador eléctrico en España y estoy interesado en utilizar los productos de CNC Electric en mis proyectos. Me gustaría obtener más información sobre el Wifi Breaker, sus aplicaciones, especificaciones técnicas y precio.¿Podrían enviarme un catálogo de productos, lista de precios y disponibilidad de stock? Además, ¿ofrecen formación técnica para la instalación?
—Miguel Sánchez
