CNSOVIO is a professional medium voltage switchgear manufacturer and supplier, providing 10kV ring main units and electrical distribution equipment for utility, industrial, and infrastructure projects.
Our switchgear solutions are designed to support reliable power distribution, circuit switching, and electrical protection. We work with distributors, EPC contractors, electrical contractors, and project buyers to provide equipment selection support, OEM services, and customized solutions based on specific project requirements.
CNSOVIO supplies medium and high voltage switching equipment for power distribution networks, substations, and industrial electrical systems. Our product range includes ring main units and high-voltage isolation equipment designed for different switching, distribution, and isolation requirements.
Explore our available products below to find suitable equipment for your electrical project.
Medium voltage switchgear is an essential part of electrical power distribution systems. It is used to control, protect, and isolate electrical circuits operating at medium voltage levels, typically in distribution networks and industrial power systems.
A medium voltage switchgear assembly may integrate circuit breakers, load break switches, disconnectors, earthing switches, busbars, current transformers, protection relays, and other electrical components, depending on its design and application.
By combining switching and protection functions in an integrated enclosure, medium voltage switchgear helps improve operational safety, maintain power supply continuity, and simplify electrical system management.
Distributes electrical power to transformers, feeders, and downstream loads.
Works with protection devices to detect and isolate electrical faults.
Supports controlled switching and safe isolation for maintenance.
Cnsovio provides professional power equipment and customized solutions for industrial and commercial applications worldwide. From product selection to OEM/ODM customization, our team is ready to support your projects with reliable products, professional expertise, and responsive service.
Air-insulated switchgear uses air as the primary insulating medium between energized components and grounded structures. It is commonly used in indoor substations, industrial facilities, and utility distribution systems.
AIS is suitable for projects where equipment accessibility, maintenance arrangements, and modular panel configurations are important considerations.
Gas-insulated switchgear uses an insulating gas within sealed compartments to provide electrical insulation. Its compact design makes it suitable for installations where space is limited or where environmental conditions require enclosed equipment.
The insulation gas, sealing arrangement, pressure monitoring, and applicable environmental regulations should be evaluated during selection.
A ring main unit is a compact type of medium voltage switchgear designed primarily for ring distribution networks. It typically combines switching, isolation, and protection functions within a metal-enclosed assembly.
RMUs are commonly used in urban distribution networks, industrial parks, commercial buildings, and compact substations.
To learn how it differs from switchgear, please refer to Ring Main Unit vs Switchgear for further details.
The technical configuration of medium voltage switchgear depends on the system voltage, rated current, short-circuit conditions, insulation requirements, and installation environment.
Before purchasing switchgear, buyers should review the following technical parameters to ensure compatibility with the electrical network and project specifications.
Technical Parameter | Description / Selection Consideration |
|---|---|
Rated Voltage | Select according to the system voltage and equipment voltage class |
Rated Frequency | 50Hz or 60Hz, according to the power system |
Rated Current | Based on feeder load and busbar capacity |
Rated Short-Time Withstand Current | According to the calculated short-circuit current |
Rated Peak Withstand Current | Based on the system’s peak fault current |
Rated Short-Circuit Duration | Defined by the project fault-clearing requirements |
Insulation Level | Power-frequency and lightning impulse withstand requirements |
Insulation Medium | Air, gas, or solid insulation, depending on design |
Protection Class | Enclosure protection requirements according to installation conditions |
Installation Type | Indoor or outdoor |
Operating Mechanism | Manual, motor-operated, or other specified mechanisms |
Applicable Standards | IEC 62271 series or other project-required standards |
System Application | Common Equipment Voltage Class |
|---|---|
10kV distribution system | 12kV |
20kV distribution system | 24kV |
33kV distribution system | 36kV |
35kV distribution system | 40.5kV |
For accurate equipment selection and quotation, buyers should confirm the following information:
Selecting the right medium voltage switchgear requires more than checking the rated voltage. Buyers should evaluate the electrical characteristics, network configuration, installation environment, and long-term maintenance requirements before placing an order.
For information regarding the specific voltage ratings of medium-voltage switchgear, please refer to the 11kV, 22kV, 33kV Switchgear Guide for further details.
Identify the nominal operating voltage of the electrical network, such as 10kV, 20kV, or 33kV.The equipment's rated voltage must be suitable for the system's highest operating voltage and insulation requirements.
Determine the maximum continuous operating current of the incoming and outgoing circuits. The rated current of the switchgear, busbars, and associated components should be selected according to the actual load and applicable design margins.
Check the prospective short-circuit current at the installation point. The rated short-time withstand current, peak withstand current, and fault-clearing duration must match the system protection design.
Choose the equipment structure according to your project, CNSOVIO provides technical consultation and customized equipment solutions according to customer requirements.
valuate the installation location, ambient temperature, humidity, altitude, pollution level, ventilation, and available installation space. For outdoor installations, additional attention should be given to enclosure protection, weather resistance, and operating conditions.
Check the required IEC or local standards, drawings, protection schemes, wiring diagrams, and testing documentation before finalizing the technical agreement.
Medium voltage switchgear plays an important role in maintaining safe and reliable power distribution across different industries. It is commonly installed in substations, industrial facilities, infrastructure projects, and commercial power systems.
Used for incoming and outgoing feeder control, transformer connections, and distribution network protection.
Supports power distribution for production facilities, motors, pumps, compressors, and other industrial loads.
Provides medium voltage power distribution for shopping centers, office buildings, hospitals, and large facilities.
Used in solar and wind power collection systems, transformer connections, and grid interconnection facilities.
Choosing a reliable electrical equipment manufacturer is essential for project performance, product quality, and long-term operational reliability.
CNSOVIO focuses on the research, development, and manufacturing of high-voltage power distribution equipment. We work with international customers to provide technical support, customized product solutions, and dependable service throughout the procurement process.
Our support extends beyond equipment supply. We assist customers with product selection, technical specification review, equipment configuration, and application-related questions.
Whether you are purchasing individual equipment or sourcing products for a complete electrical project, CNSOVIO aims to provide practical technical support and responsive communication.
For international projects, the IEC 62271 series is an important reference for high-voltage switchgear and controlgear. Different standards apply to different equipment types and functions.
Standard | Main Scope |
|---|---|
IEC 62271-1 | Common specifications for high-voltage switchgear and controlgear |
IEC 62271-100 | AC circuit breakers |
IEC 62271-102 | AC disconnectors and earthing switches |
IEC 62271-103 | Switches for rated voltages above 1kV and up to 52kV |
IEC 62271-200 | AC metal-enclosed switchgear and controlgear above 1kV and up to 52kV |
Buyers should confirm the required standards, type-test reports, routine test documentation, and project-specific compliance requirements before ordering.
Medium voltage switchgear is generally used in distribution systems operating above 1kV and up to 52kV under the IEC 62271 framework. High voltage switchgear is designed for higher voltage applications, including transmission and high-voltage substations. The exact classification and equipment requirements should follow the applicable standards and project specifications.
AIS uses air as its primary insulating medium, while GIS uses insulating gas within sealed compartments. RMU refers to a compact switchgear assembly designed mainly for ring distribution networks. An RMU may use different insulation technologies depending on its design.
Common equipment voltage classes include 12kV, 24kV, and 36kV, which are used in 10kV, 20kV, and 33kV distribution systems respectively. Other voltage classes may be required depending on the project. Contact CNSOVIO to confirm available models and configurations.
Rated current should be selected according to the maximum continuous load current, feeder requirements, busbar capacity, and applicable design conditions. The selected equipment must also meet the required temperature-rise and operating requirements.
To prepare an accurate quotation, provide the system voltage, rated current, short-circuit rating, number of feeder ways, installation environment, required standards, and preferred equipment configuration. Electrical single-line diagrams and technical specifications are also helpful.
Yes. Equipment configuration and design requirements can be discussed according to project specifications, including electrical ratings, feeder arrangements, enclosure requirements, and control functions. Customized solutions are subject to technical review and product availability.
Buyers should request the product datasheet, general arrangement drawings, electrical single-line diagrams, wiring diagrams, applicable test reports, routine inspection records, installation instructions, and operation and maintenance manuals, as required by the project.
Our team will review your requirements and get back to you with technical assistance and quotation information.
