Medium Voltage SwitchgearManufacturer— VCB, RMU & SF6-Free
12kV–40.5kV vacuum circuit breakers, ring main units, SF6-free switchgear & indoor/outdoor MV panels. ISO/CE/IEC 62271 certified. Factory direct pricing, 10,000+ units/year capacity. Exported to 20+ countries.
Core Products
SPV-12 Outdoor VCB (12kV)
Oil-free, SF6-free, maintenance-free. Longitudinal magnetic field rotating arc. APG epoxy insulation.
SPV-24 Outdoor VCB (24kV)
24kV higher insulation class. 125/145kV lightning impulse. Proven technology for 20kV distribution systems.
SPG-12 SF6 Load Break Switch (12kV)
SF6 pressure-assisted arc blowing. 304 stainless steel housing. Safety interlocks. FTU compatible.
SPG-24 SF6 Load Break Switch (24kV)
24kV enhanced insulation. 630/1250A variants. 125/145kV lightning impulse. For 20kV systems.
Our Product Range
Complete medium and low voltage switchgear solutions for power distribution networks, substations, and industrial installations.
Integrated Outdoor VCB
ZW32-12/T630-20G integrated (fusion) outdoor vacuum circuit breaker. Deep fusion design combining VCB body, high-power capacitor power supply, built-in isolation switch, and current sensors into one compact unit for distribution automation.
Vacuum Circuit Breakers
High-performance 12-24kV outdoor and indoor vacuum circuit breakers designed for power distribution networks. Spring-operated mechanism with 10,000+ mechanical operations life cycle.
Indoor Vacuum Circuit Breakers
Premium indoor medium voltage vacuum circuit breakers from 12kV to 40.5kV with up to 50,000 mechanical operations life.
SF6 Circuit Breakers
SF6 gas-insulated circuit breakers for medium voltage applications. Superior arc extinguishing performance with SF6 gas, suitable for substations and industrial installations.
SF6 Load Break Switches
Outdoor SF6 gas-insulated load break switches for pole-mounted applications. Suitable for urban distribution networks as sectionalizing or tie switches.
Gas-Insulated Switchgear (GIS)
Metal-enclosed gas-insulated switchgear (C-GIS) for 12kV and 40.5kV. Compact, maintenance-free, eco-friendly options available.
Medium Voltage Switchgear
Complete range of AC metal-enclosed switchgear panels from 12kV to 40.5kV for power distribution, control, and monitoring.
Low Voltage Switchgear
Low voltage switchgear cabinets including draw-out type (GCS) and fixed type (GGD) for power distribution, motor control, and reactive power compensation.
Why Choose NAIJI Electric
Backed by 25+ years of expertise in medium voltage switchgear manufacturing, we deliver reliable power distribution solutions worldwide.
25+ Years Experience
Established in 2001 as a Sino-Korean joint venture, combining Chinese manufacturing expertise with Korean technology and international quality standards.
Certified Quality
ISO 9001, ISO 14001, CE, and CCC certified. All products manufactured to IEC 62271 international standards with rigorous factory testing.
Global Reach
Exported to 20+ countries across Southeast Asia, Middle East, Africa, Latin America, and CIS countries. Supporting EPC contractors and utility companies worldwide.
OEM & Custom Solutions
Flexible OEM manufacturing with 250+ units monthly capacity. 30-day lead time on standard products. Custom configurations available for project-specific requirements.
Application Scenarios
Our switchgear solutions serve critical infrastructure across multiple sectors of the power industry.
Power Distribution
Pole-mounted VCB and load break switches for urban and rural overhead distribution networks.
Substations
Indoor VCB, medium voltage switchgear, and low voltage switchgear for substation installations.
Renewable Energy
Grid connection switchgear for wind farms and solar power stations.
Industrial
Motor control centers and power distribution for factories, mining, and heavy industry.
Engineering Resources
Switchgear Technical Guides
In-depth guides written by our engineering team for power system professionals.
Medium Voltage Switchgear Guide
What is medium voltage? Voltage ranges, switchgear types, and how to select the right equipment for 1kV–36kV systems.
Ring Main Unit (RMU) Guide
Complete guide to ring main units — working principle, configuration options, and selection criteria for distribution networks.
SF6-Free Switchgear
Why utilities are replacing SF6 gas — cost comparison, vacuum and dry-air alternatives, and EU regulation timeline.
Metal Clad vs Metal Enclosed
ANSI C37.20 differences explained — compartmentalization, arc resistance, and when each type is required.
Types of Electrical Switchgear
HV, MV and LV switchgear classification with comparison tables — voltage ratings, applications, and selection criteria.
Vacuum Interrupter Guide
How vacuum interrupters work, CuCr contact materials, dielectric recovery, and how to test and select them.
Indoor Vacuum Circuit Breaker Guide
12kV to 40.5kV indoor VCB types, fixed vs withdrawable, ratings, and how to specify for your switchgear project.
VCB vs SF6 Circuit Breaker
10-dimension comparison of vacuum and SF6 circuit breakers — lifecycle cost, environmental impact, and selection criteria.
Distribution Recloser Guide
Complete guide to automatic circuit reclosers — operating principle, coordination, FLISR, and smart grid integration.
Need Medium Voltage Switchgear?
Get factory-direct pricing from an ISO/CE certified manufacturer with 25+ years of experience. OEM and custom configurations available.