Factory-Direct Low Voltage Switchgear & Power Distribution Cabinets
Low Voltage Switchgear
JOST designs and manufactures high-performance LV switchgear, motor control centers (MCC), and main distribution boards for industrial, commercial, and utility power systems. Whether you require cost-effective low voltage fixed switchgear or modular, flexible low voltage withdrawable switchgear, our custom-built panel assemblies guarantee superior electrical safety, high breaking capacity, and long-term operational reliability.
Factory Direct Supply
OEM/ODM Supported
Utility & Industrial Applications
Export-Ready
Explore Our LV Switchgear Product Series
Standardized and customizable low voltage distribution cabinets engineered for varied system requirements and operating environments.
High-Performance LV Switchgear Solutions for Safe & Uninterrupted Power
Low voltage switchgear serves as the core distribution hub in modern industrial and commercial power networks, playing a vital role in power reception, main circuit control, feeder protection, and motor control centers (MCC). Designed for maximum system availability and operational safety, JOST LV switchgear ensures seamless power management and circuit protection against overloads, short circuits, and ground faults.
Fully compliant with IEC 61439 standards, our product range encompasses both robust low voltage fixed switchgear (such as the GGD series) for straightforward, economical installations, and advanced low voltage withdrawable switchgear (GCK, GCS, and MNS series) for continuous-duty applications where hot-swappable drawer modules are required. Engineered with high-conductivity T2 copper busbars, strict internal segregation forms, and premium circuit breakers, JOST switchboards provide superior thermal stability, high short-circuit breaking capacity, and long service life in demanding environments.
Choosing Between Fixed and Withdrawable LV Switchgear
Low Voltage Fixed Switchgear (GGD Series)
Cost-Effective & Simple Operation for Stable Distribution Networks
Our low voltage fixed switchgear (such as the GGD model) uses stationary internal components mounted directly on the frame structure. It offers an economical, straightforward solution for sub-distribution panels, utility transformer substations, and industrial applications where frequent unit swapping is not required. Designed for easy wiring, excellent thermal ventilation, and low operational maintenance costs.
Low Voltage Withdrawable Switchgear
Maximum Operational Continuity, Safety & Rapid Maintenance
For critical infrastructure and continuous process manufacturing, low voltage withdrawable switchgear provides functional drawer modules that can be isolated, tested, or swapped without turning off the power to the entire switchboard. Each drawer features clear “Connected, Test, Disconnected” mechanical positions, preventing operator error and reducing system downtime during routine maintenance or component replacement.
TECHNICAL CAPABILITY
Model Technical Parameter Comparison
Compare key ratings across our GGD, GCK, GCS, and MNS low voltage switchgear models to find the right switchboard architecture for your project.
Technical Highlights
Internal Segregation & Form Protection
Engineered to satisfy IEC 61439 separation forms (Form 1 up to Form 4b), isolating main busbars, functional units, and cable terminals to limit internal arcing and enhance personnel safety.
High-Purity Copper Busbar System
Mechanical & Electrical Safety Interlocks
Equipped with mechanical interlocks that prevent door opening under load, drawer withdrawal while energised, and incorrect switching actions during live operation.
Smart Power Monitoring & Automation Integration
Optional integration of digital multi-function meters, smart circuit breakers, temperature sensing sensors, and Modbus/Ethernet communication protocols for SCADA or EMS connectivity.
Applications for Low Voltage Switchgear
Industrial Manufacturing & Process Plants
Central power distribution and motor control center (MCC) applications in chemical plants, paper mills, automotive factories, and steel mills.
Commercial Infrastructure & High-Rise Buildings
Reliable low-voltage main power boards for shopping centers, office towers, hospitals, airports, and transport hubs.
Power Generation & Utilities
Auxiliaries supply switchgear and low-voltage side power control for thermal plants, hydro facilities, and power distribution stations.
Data Centers & Critical Infrastructure
High-density, redundant LV switchgear setups designed for uninterrupted power supply, fast maintenance, and real-time energy monitoring.
Why Choose JOST
Factory-Direct Manufacturing
JOST is backed by the manufacturing base of Fujian Yi’anju Electrical Equipment Co., Ltd. Our production process covers structural fabrication, electrical assembly, wiring, testing, and export preparation.
OEM/ODM Customization
We can customize product structure, enclosure dimensions, internal layout, components, labeling, color, and branding according to project or distributor requirements.
Engineering Support
Our team can assist with product selection, configuration review, technical adaptation, and project-specific design requirements.
Integrated Production Workflow
By coordinating design, fabrication, assembly, testing, and packaging within one manufacturing workflow, we help reduce communication gaps and improve delivery consistency.
Need a Tailored Single-Line Diagram (SLD) Review & Quotation?
Share your low voltage panel specifications, circuit breaker brand preferences, and load details for a fast engineering proposal within 24 hours.
Customization & Assembly Process
Project requirements are reviewed to define the electrical arrangement, enclosure structure, equipment layout, and connection requirements.
Cabinet structures, panels, doors, mounting plates, and related metal parts are prepared for assembly and project integration.
Switching devices, protection components, busbars, measurement units, and accessories are assembled according to the approved configuration.
Internal wiring, terminal arrangements, labeling, mechanical connections, and workmanship are checked before testing.
Testing and inspection are carried out according to the product configuration, technical requirements, and applicable project documentation.
Finished equipment is prepared for safe handling, transport, and overseas delivery according to order and destination requirements.
How to Select LV Switchgear
01
Determine System Voltage & Current
Confirm system operating voltage (380V/400V/690V) and total load current to size main busbars (e.g., 1000A, 2500A, 4000A, 6300A).
02
Select Cabinet Type (Fixed vs. Withdrawable)
Decide between low voltage fixed switchgear (GGD) for cost savings or low voltage withdrawable switchgear (GCK/GCS/MNS) for high operational continuity.
03
Specify Component Brands & Ratings
Indicate preferences for Air Circuit Breakers (ACB), Moulded Case Circuit Breakers (MCCB), contactors, and protection relays.
04
Choose Internal Segregation Form
Select required segregation (Form 2, Form 3, or Form 4) based on plant safety standards and maintenance access requirements.
05
Confirm IP Protection & Site Ambient
Define ingress protection class (e.g., IP30 indoor or IP54 dust-proof/water-resistant) and environmental conditions (temperature, altitude, humidity).
06
Request Technical Quote
Send your project parameters to JOST to receive a competitive factory-direct price list and detailed CAD drawings.
Build Your Low Voltage Power Network with JOST？