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Распределительные устройства среднего и низкого напряжения
Medium-voltage switching and low-voltage distribution assemblies for incoming supply, feeder protection and motor control. Share your single-line diagram and cabinet schedule for a configuration review.
Explore Switchgear Types
Start with the voltage side and circuit duty. Each family has its own models, electrical ratings and installation requirements.
Распределительные устройства среднего напряжения
Incoming supply, feeder switching and transformer protection. Explore the KYN, XGN and HXGN model arrangements.
Распределительные устройства низкого напряжения
Main distribution, outgoing feeders and motor-control units. Compare GGD fixed cabinets with GCS, GCK and MNS draw-out assemblies.
Switchgear Types and Uses
From incoming supply to the final circuit
- Incoming supply
- MV switchgear
- Transformer
- LV switchgear
- Outgoing loads
A typical distribution arrangement. Use the project single-line diagram to define each voltage side, protection boundary and connection to equipment supplied by others.
MV withdrawable breaker switchgear
- Models
- KYN28A-12 and KYN28-12
- Use
- Incoming and feeder circuits with a withdrawable circuit-breaker arrangement.
- Check
- Breaker and fault duty
- Protection and interlocks
- Compartment arrangement
- Cable and service access
MV ring-network and fixed switchgear
- Models
- XGN15-12, HXGN15-12 AC and HXGN-12
- Use
- Ring-network or fixed-panel circuits with switching and protection specified for each function.
- Check
- Panel function and device
- Switch-fuse requirements
- Earthing and interlocks
- Cable terminations
LV fixed distribution
- Models
- GGD
- Use
- Low-voltage incoming, bus-coupling and outgoing distribution circuits in a fixed assembly.
- Check
- Busbar and feeder duty
- Protective-device schedule
- Control and metering
- Installation and access
LV draw-out assemblies
- Models
- GCS, GCK and MNS
- Use
- Distribution feeders and motor-control functions with specified withdrawable functional units.
- Check
- Functional-unit schedule
- Busbar and circuit ratings
- Isolation and maintenance
- Cable and service access
Compare each model against the project schedule. Check busbar and outgoing-circuit ratings separately, along with the specified construction and protection arrangement.
Compare fixed and withdrawable MV switchgearSwitchgear Configuration Guide
Switchgear Applications
Utility and secondary distribution
Plan incoming supply, ring-network connections and transformer feeders from the utility scheme. Confirm switching duties, protection, metering and operating interlocks for each panel.
Explore applicationIndustrial facilities
Coordinate production feeders and motor-control circuits with the plant load schedule. Review bus sections, maintenance arrangements, expansion space and the interfaces between MV and LV equipment.
Explore applicationИнфраструктура и общественные объекты
Define incoming sources, essential circuits and the required maintenance supply arrangements. Check transfer interfaces, access control, cable routes and the service space around the assemblies.
Explore applicationRenewable and distributed energy
Start with the inverter or plant AC interface, the collection scheme and the connection requirements. Specify switching, protection, metering and control responsibilities for each distribution section.
Explore applicationSwitchgear Quotation Checklist
Supply scope
- Included equipment
- MV and LV panels, circuit functions, protection, metering, controls and required accessories.
- Connection points
- Mark incoming sources, bus sections, outgoing circuits and equipment supplied by others on the single-line diagram.
Installation & drawings
- Electrical documents
- Cabinet and functional-unit schedules, single-line diagram, rated data and protection/control diagrams.
- Site arrangement
- Room layout, cable entry, bus-duct interfaces, operating aisles, maintenance space and delivery access.
Testing & acceptance
- Acceptance plan
- Required standards, inspection points, document schedule and acceptance criteria.
- Test documents
- Agree verification or test documents for the proposed assembly and ratings, plus routine test records for the supplied equipment.
Shipping & handover
- Transport arrangement
- Transport sections, dimensions, weight, lifting points and any separately packed components.
- Dispatch documents
- Approved drawings, operating instructions, packing list and agreed inspection records.
Why Choose SUBIA for Switchgear
Project configuration
SUBIA reviews your ratings, single-line diagrams and cabinet schedule to prepare the proposed equipment configuration.
Equipment interfaces
Discuss MV, transformer and LV connections together, with each panel function, control interface and supply responsibility identified.
Drawings and inspection documents
Agree the drawing schedule and inspection records during technical review, matching the documents to the equipment and ratings being supplied.
Packing and delivery coordination
Review transport sections, package markings and accessory lists so your team can plan receipt, unloading and assembly at the site.
Switchgear Selection & Procurement FAQs
How do I decide whether the enquiry needs MV, LV or both?
Use the single-line diagram to identify each voltage side and its circuit functions. MV equipment covers the specified incoming, feeder and transformer-protection duties; LV assemblies cover downstream distribution and motor-control requirements. Include both sides when the project needs a coordinated equipment review.
How should I compare fixed and withdrawable assemblies?
Compare the isolation, maintenance, replacement and service-access requirements for the actual circuits. Then review the model arrangement, protection devices, functional units and available installation space. Construction type alone does not establish the required electrical ratings.
Are voltage and current enough to select a cabinet?
They are a starting point. Provide the prospective fault level and duration, circuit duties, protection scheme, busbar and feeder requirements, control interfaces and service conditions. Keep the ratings for each voltage side and circuit separate.
Can one enquiry include MV switchgear, a transformer and LV switchgear?
Yes. Show the equipment and connection points on the single-line diagram and schedule. Define transformer interfaces, protection and metering responsibilities, external cables or bus ducts, and which parts of the installation are supplied by others.
Which installation conditions affect the configuration?
Provide the room arrangement, operating and maintenance clearances, cable entry, bus-duct connections and delivery route. Include ambient conditions, altitude, exposure and any size restrictions. Use approved project drawings to confirm the installed dimensions and interfaces.
What should I prepare for a quotation?
Send the single-line diagram, cabinet and functional-unit schedules, known ratings, protection and control requirements, and the room layout. Identify open items. Agree the required drawings, verification or test evidence, acceptance points and delivery documents during the quotation review.
