Switchgear
Unicore supplies a comprehensive range of switchgear products, from low-voltage distribution cabinets to high-voltage metal-enclosed switchgear, designed to meet the full spectrum of power distribution and control requirements across industrial, utility, and infrastructure projects worldwide.
Our switchgear portfolio includes withdrawable and fixed low-voltage assemblies, SF6 ring main units, armored metal-enclosed switchgear, and motor control centers, all manufactured in compliance with IEC, ANSI, and GB standards. Whether you are equipping a substation, power plant, industrial facility, or urban distribution network, Unicore provides a coordinated switchgear solution engineered to your voltage class, application, and site requirements.
Custom Switchgear Solutions
Voltage: 0.4-12 kV
Current: Up to 4000A
Frequency: 50/60 Hz
Access Top Quality Switchgear Solutions to Elevate Your Power Projects
Reliable HV and LV Switchgear For Sale
HXGN-12 Box Type Fixed AC Metal Enclosed Ring Network Switchgear
Unicore HXGN-12 series switchgear is a fixed AC metal-enclosed ring main unit featured a highly integrated structure with small footprint, making it ideal for space-constrained installations, widely used in urban grid construction, industrial facilities, and prefabricated substations.
Suitable for use in AC 50Hz, 3-10kV network
Free from fire and explosion hazards
Compact, integrated design for space-constrained installations
Reliable mechanical interlocking to prevent misoperation
Compliant with GB3906 and IEC60420 standards
KYN28A-12 High Voltage Armored Removable AC Metal Enclosed Switchgear
Our KYN28A-12 is a second-generation intelligent armored withdrawable AC metal-enclosed switchgear for 3.6–12kV, 50Hz systems, designed for power reception, distribution, control, protection, and monitoring in large-scale industrial and utility applications.
Rated current up to 4000A
For large power plants and substations
Compatible with VS1, ABB VD4, and Schneider HVX breakers
Intelligent control via CAN bus communication interface
Remote control, metering, and signaling capabilities
XGN15-12 AC High Voltage SF6 Ring Network Switchgear
The XGN15-12 is a compact, expandable SF6 load switch-based metal-enclosed ring main unit for 12kV, 50Hz AC power systems, widely used in industrial and civilian cable ring networks and power supply terminals.
Air-insulated metal-enclosed cabinet structure
Compact design with strong system completeness
Supports both ring network and terminal substation wiring
Standardised components for flexible configuration combinations
Compatible with SF6 load switches, earthing switches, and fuses
GGD AC Low Voltage Power Distribution Cabinet
The GGD is a fixed AC low-voltage power distribution cabinet designed for 50Hz, 380V–400V systems with rated currents up to 4000A, widely used in power plants, substations, and industrial and mining enterprises for power conversion, distribution, and control.
High breaking capacity with excellent fault interruption performance
Good dynamic and thermal stability under short-circuit conditions
Flexible electrical configurations for diverse application requirements
Convenient modular assembly with strong practical adaptability
Novel cabinet structure with high protection rating
GCK Low Voltage Withdrawable Switchgears
GCK low-voltage withdrawable switchgear consists of a Power Distribution Center (PC) cabinet and Motor Control Center (MCC), suitable for AC 50/60Hz systems with rated voltage up to 660V and rated current up to 4000A, serving power distribution, motor control, and lighting applications.
Advanced modular structure with flexible electrical configurations
Freely combinable configuration units for diverse project needs
High circuit density within a single cabinet enclosure
Space-saving design with compact footprint
Suitable for power plants, petroleum, chemical, and textile industries
GCS Low Voltage Withdrawable Switchgear
GCS low-voltage withdrawable switchgear is suitable for three-phase AC 50Hz systems with rated voltage of 380V and rated current up to 4000A, widely used in power plants, substations, industrial and mining enterprises, and large commercial facilities for power distribution, motor control, reactive power compensation.
Fully assembled combination structure
Independent compartments for functional units, busbar, and cable rooms
CNC-machined cold-rolled steel panels with high mechanical strength
Supports remote operation, electricity metering, and computer interface
Up to 36 pairs of auxiliary contacts per draw-out unit
GCS Series Sample Specifications — Full Data for All Series Available Upon Request
Specifications
| Rated insulation voltage (V) | AC660 |
| Rated working voltage (V) | AC380V(AC400) |
| Rated current of horizontal busbar (A) | ≤4000A |
| Rated current of vertical busbar (A) | 1000A |
| Maximum current of draw-out circuit (A) | 400A |
| Rated frequency (Hz) | 50(60) |
| Peak withstand current of horizontal busbar (kA) | 105,176 |
| Short time withstand current of horizontal busbar (kA/1S) | 50,80 |
| Peak withstand current of vertical busbar (kA) | 105 |
| Short time withstand current of vertical busbar (kA/1S) | 50 |
| Rated power frequency withstand voltage (V/1 min) | 2500 |
| Secondary power frequency withstand voltage (V/1 min) | 2500 |
| Effective height of functional unit (mm) | 1760 |
Discover Core Advantages of Switchgears to Optimize Your Power Layout
Remarkable Advantages of Unicore Switchgear
High Breaking Capacity
Unicore switchgear is engineered to handle high fault currents reliably, with proven short-circuit breaking performance across all product series — protecting your equipment, your personnel, and your project investment under even the most demanding grid conditions.
Flexible Configuration Options
Unicore switchgear is designed around modular, combinable architectures — allowing engineers to freely select and combine functional units, circuit configurations, and protection devices to match the exact requirements of any power distribution or motor control application.
Reliable Safety Interlocking
All Unicore switchgear series incorporate dependable five-prevention mechanical interlocking systems — preventing misoperation of circuit breakers, ground switches, and draw-out units — ensuring safe operation for maintenance personnel and protecting critical power infrastructure from human error.
Wide Application Compatibility
Unicore switchgear is engineered for reliable performance across a broad spectrum of applications — from utility substations and power plants to industrial facilities, urban distribution networks, renewable energy projects, commercial buildings, and public infrastructure.
Compact & Space-Efficient Design
Unicore switchgear products are designed to maximise circuit density within a minimal cabinet footprint — making them ideal for installations where space is constrained, including prefabricated substations, urban distribution stations, and high-rise building electrical rooms.
Robust Mechanical Construction
All our switchgear cabinets are manufactured from high-quality cold-rolled steel, CNC-machined for precision, and surface-treated with galvanising, phosphating, and electrostatic spraying, delivering exceptional structural strength, corrosion resistance, long service life in demanding environments.
Trusted by Clients Across Industries and Continents
Unicore Switchgear Global Cases
Unicore Switchgear Working in Russia
Industrial Mining – Power Distribution
KYN28A-12, 10kV
Mozambique Client Visited Unicore Factory
Municipal Substation – Public Utility
HXGN-12, 6.3kV
Switchgear Delivered to Puerto Rico
Commercial Complex – Power Grid
GCS, 380V
UNICORE ELECTRIC
Transformer Solutions
Collaborating with Industry Leaders to Deliver Excellence in Power Solutions
Our Global Partners Network
Real Experiences from Switchgear Professionals Who Trust Unicore
What Our Clients Say
Excellent Safety Standards
“Our substation expansion in a high-traffic urban area demanded the highest safety standards. Unicore’s KYN28A-12 switchgear delivered exactly that — the five-prevention mechanical interlocking system performed flawlessly during commissioning, and our site team reported zero misoperation incidents throughout the entire installation process.”
Bubakari Mariko
Gambia
⭐⭐⭐⭐⭐
Withdrawable Design Saved Us Time
“Maintenance downtime is critical in our industrial facility. Unicore’s GCS withdrawable switchgear allowed our engineers to pull out and replace individual units without shutting down the entire system. The mechanical interlock and draw-out mechanism worked precisely as specified, cutting our scheduled maintenance window by half.”
TIkto Jo
Myanmar
⭐⭐⭐⭐⭐
Delivering Power Distribution Across Diversified Global Sectors
Applications of Switchgear Power Systems
Utility Substations and Power Grids
Essential for utility substations, switchgear systems control, protect, and isolate equipment across distribution networks. They ensure safe grid operations, enable rapid fault isolation, and allow routine maintenance without interrupting power to downstream residential and commercial grid customers.
Heavy Industrial and Mining Plants
Heavy industrial facilities rely on robust switchgear for high-capacity power distribution and protection against severe electrical faults. In continuous operations like mining or chemical processing, switchgear enhances safety, minimizes unexpected downtime, and manages heavy motor load fluctuations.
Commercial Complexes and Buildings
Commercial complexes, healthcare facilities, and busy airports utilize switchgear systems to manage large-scale electrical loads safely and reliably. They provide vital fault isolation, seamless backup power integration, and surge protection, ensuring critical facility operations remain functional.
Data Centers and IT Infrastructure
Data centers depend on high-performance switchgear for uninterruptible power delivery and advanced fault management. It enables seamless automatic switching between primary feeds and emergency generators, protecting sensitive servers from voltage surges and preserving critical data integrity.
Renewable Energy and Microgrids
Switchgear in solar and wind farms ensures the safe integration of variable power sources into the main electrical grid. It manages dynamic load balancing, protects sensitive inverter equipment, and isolates faults across vast renewable generation sites to optimize long-term energy yield.
Transportation and Railway Networks
Electric railways, metro transit networks, and EV charging hubs depend on switchgear to manage high-voltage traction power safely. It isolates line faults instantly, protects signaling electronics from voltage spikes, and ensures uninterrupted transit operations across busy transportation corridors.
Essential Technical Guidance for Optimal Equipment Selection
Key Considerations When Selecting Switchgear for Your Facility
1. Voltage Rating and Current Capacity
Matching the switchgear’s rated voltage and continuous current capacity to your electrical grid is the primary engineering step. Low-voltage units (up to 1,000V) serve commercial complexes and motor control centers, while medium-voltage (1kV to 36kV) and high-voltage (above 36kV) switchgear are required for utility substations, industrial plants, and renewable energy generation.
2. Operating Environment and Enclosure IP Rating
Determine whether the installation site is indoors or outdoors to specify enclosure weatherproofing. Outdoor switchgear must withstand extreme weather, ambient humidity, dust, and coastal salt spray, requiring IP54 or IP65 sealed enclosures with anti-corrosion Al-Zn coatings. Indoor installations focus on compact footprints and proper ventilation.
3. Arc-Resistant Safety and Interlock Protection
Prioritize personnel and equipment safety by specifying switchgear built with internal arc-resistant designs (IAC rated) and mechanical interlocks. Built-in “5-proof” interlocks prevent dangerous operator misoperations, while arc-venting ducts direct explosive pressure and hot gases away from field technicians during internal fault conditions.
4. Physical Space Constraints and Modular Expandability
Physical space limitations directly influence your choice of insulation architecture. Space-constrained urban substations or underground facilities benefit from Gas-Insulated Switchgear (GIS), which reduces footprint by up to 70%. Additionally, selecting modular switchgear allows seamless busbar extension for future grid expansion.
5. Compliance with International Standards
Ensure the switchgear adheres to recognized international industry standards, such as IEC 62271, IEEE, ANSI, or UL certifications. Compliance guarantees that the equipment has undergone rigorous type testing for short-circuit withstand, temperature rise, and dielectric insulation, ensuring seamless integration into regional utility grids.
6. Maintenance Demands and Spare Parts Accessibility
Evaluate long-term maintenance requirements based on your facility’s technical resources. While Air-Insulated Switchgear (AIS) offers straightforward visual inspection and easy component servicing, Gas-Insulated Switchgear (GIS) provides virtually maintenance-free operation. Ensure the manufacturer utilizes standardized components for easy global spare parts sourcing.
7. Initial Capex vs. Total Cost of Ownership
Look beyond initial capital procurement costs and evaluate the switchgear’s 30-year Total Cost of Ownership. Investing in high-efficiency, durable switchgear with low-loss copper busbars and high-grade insulation reduces operational losses, minimizes unplanned downtime, and lowers lifetime maintenance expenses.
Premium Hardware, Heavy-Duty Materials, and Intrinsic Safety Engineering
Core Components of Electric Switchgear
Understanding what goes inside a switchgear cabinet is essential for evaluating equipment reliability, personnel safety, and long-term operating costs. Unicore manufactures fully transparent, IEC 62271-compliant switchgear using high-grade materials and industry-proven components:
1. Circuit Breakers and Switching Devices
As the primary interrupting hardware, our vacuum (VCB) and gas (SF6) circuit breakers instantly extinguish high-energy arcs and isolate fault currents up to 40kA. Designed in modular drawout configurations, they allow tool-free replacement during routine servicing, ensuring reliable circuit interruption and eliminating prolonged site downtime for your facility.
2. Busbar System and Primary Conductors
Heavy-duty busbars form the central electrical backbone inside the cabinet, transferring high-capacity currents between incoming feeders, main breakers, and outgoing circuits. Manufactured exclusively from 99.9% T2 pure electrolytic copper (with optional tin plating), our busbars prevent joint oxidation, reduce electrical resistance, and withstand severe thermal and short-circuit mechanical stresses.
3. Instrument Transformers CT and PT
Current Transformers (CT) and Potential Transformers (PT) step down high primary currents and voltages into safe, standardized 5A/1A and 110V/100V signals. Equipped with high-precision Class 0.2s or 0.5 accuracy cores, our instrument transformers remain unsaturated during severe grid faults, providing exact metering data and reliable sensing inputs for protective relays and meters.
4. Relay Protection and Control Units
Digital microprocessor-based protection relays act as the intelligent control brain, continuously monitoring grid parameters to execute automated fault tripping, SCADA remote telemetry, and interlocking logic. Built with open industrial communication protocols (such as Modbus or IEC 61850), they integrate seamlessly into your local utility’s automation protocols.
5. Enclosure and Safety Interlocks
Constructed from 2.0mm heavy-duty galvanized or Al-Zn coated steel sheets, the armored housing delivers high mechanical rigidity and internal arc-flash containment (IAC rated). Every enclosure is integrated with mandatory “5-proof” mechanical interlocks to prevent operator misoperation, while offering IP4X to IP54 weather and dust protection to safeguard both personnel and equipment.
6. Digital Meters and Condition Sensors
Multifunction digital power meters and IoT sensors continuously measure electricity consumption, power quality, busbar joint temperatures, and insulation degradation. By supporting predictive condition monitoring, this intelligent sensing system helps facility managers identify thermal hotspots and insulation risks early, preventing costly unplanned power outages.
Two-Dimensional Switchgear Architecture Guide
Switchgear Categorized by Grid Specifications and Insulation Technology
Low Voltage Switchgear
(LV Switchgear)
Engineered for primary power distribution up to 1,000V in commercial buildings, industrial plants, and data centers. Featuring modular drawout designs rated up to 6,000A, our LV switchgear delivers maximum operational safety, easy maintenance, and flexible circuit configurations.
Voltage: Up to 1kV
Current: Up to 6,000A
Medium Voltage Switchgear
(MV Switchgear)
Designed for 1kV to 36kV distribution, it is essential for utility substations, solar farms, and heavy industrial facilities. Built with metal-clad armored enclosures rated up to 40kA breaking capacity, it ensures reliable arc-resistant safety and long-term continuous grid stability.
<10pC PD Level
30+ Year Life
High Voltage Switchgear
(HV Switchgear)
Built for transmission substations and power generation facilities operating above 36kV. Utilizing advanced gas insulation and rapid fault isolation technology, it withstands extreme electrical stresses, preventing outages and providing high-capacity power transmission.
99.9% Pure Copper
20x Current Proof
Air Insulated Switchgear
(AIS)
Uses ambient air as the insulating medium, providing a cost-effective and highly accessible solution for indoor utility substations. Its modular construction allows straightforward visual inspection and routine servicing, significantly lowering total initial capital procurement costs.
Ambient Air
Lowest CAPEX
Gas Insulated Switchgear
(GIS)
Uses hermetically sealed SF6 gas insulation to cut physical footprint by up to 70% versus traditional AIS units. Completely immune to salt spray, dust, and humidity, GIS is ideal for space-constrained urban substations and harsh coastal industrial outdoor environments.
Sealed SF6
Footprint: 70% Smaller
Vacuum Insulated Switchgear
(VIS)
Employs vacuum interrupters for rapid arc extinction during circuit fault clearing, eliminating contact oxidation and wear. Designed for medium-voltage networks requiring high-frequency switching operations, it delivers low maintenance demands.
Vacuum Bottle
High-Frequency
Effective Preventive Maintenance to Maximize Equipment Lifespan by Decades
How to Extend the Service Life of Your Switchgear
The operational lifespan of a switchgear cabinet depends heavily on its operating environment and load conditions. However, implementing proactive engineering strategies can extend your equipment’s service life by decades while minimizing unplanned grid downtime:
1. Regular Preventive Maintenance and Thermal Inspections
Establishing a routine inspection schedule is the foundation of long-term switchgear health. Combining visual checks with infrared thermal imaging allows maintenance teams to detect contact overheating, loose busbar torque, and minor insulation degradation early. Timely cleaning of dust and moisture prevents tracking and surface flashover, extending cabinet service life by years.
2. Modular Circuit Breaker Retrofitting
Rather than replacing the entire switchgear cabinet when an aging breaker reaches its mechanical endurance limit, utilities can perform direct breaker retrofitting. Installing modern, drop-in replacement vacuum circuit breakers (VCBs) restores full fault-interrupting capacity, upgrades switching safety, and significantly lowers long-term capital expenditure.
3. Continuous IoT Thermal and Insulation Monitoring
Transitioning from time-based maintenance to predictive maintenance requires continuous condition monitoring. Deploying wireless thermal sensors on busbar joints and online partial discharge (PD) detectors provides real-time telemetry on insulation health, alerting facility managers to thermal hotspots before costly catastrophic breakdown occurs.
4. Arc Flash Mitigation and Active Safety Upgrades
Electrical arc flash is the primary cause of sudden switchgear destruction and technician injury. Integrating ultra-fast arc flash relays with optical fiber sensors instantly trips upstream circuit breakers in under 10 milliseconds upon arc detection, minimizing internal pressure buildup, preserving internal components, and protecting operating personnel.
5. Environmental Control and Corrosion Protection
High ambient humidity, condensation, and salt spray accelerate metal oxidation and insulation breakdown inside the cabinet. Installing automatic thermostat-controlled space heaters, de-humidifiers, and specialized anti-corrosion tank coatings preserves internal dielectric strength and maintains structural enclosure integrity in harsh environments.
Note: Unicore Electric supplies standardized drawout breakers, smart thermal sensors, and arc protection retrofits compatible with most global switchgear brands. Contact our engineering team to assess your current equipment condition and receive a cost-effective lifespan extension proposal.
Why Choose Unicore
Your Trusted Partner in Power Solutions
Unicore switchgear is engineered for the demands of real projects — from fast-track urban substation rollouts to complex industrial power control systems. With over 30 years of manufacturing and export experience, we understand what utilities, EPC contractors, and industrial clients need: reliable equipment, complete documentation, and a supplier who delivers on time.
Complete LV to HV Range
From GGD low voltage distribution cabinets to KYN28A-12 high voltage armored switchgear, Unicore covers every voltage class and application type — so your entire project can be sourced from a single, accountable supplier.
Engineered to Order
Voltage class, rated current, protection level, interlocking configuration, and applicable standard — every switchgear order is engineered to your exact project requirements, not selected from a fixed catalogue.