TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Residential and commercial developments
For neighbourhoods, hotels, shopping facilities and high-rise projects requiring a packaged HV/LV supply arrangement.
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Product illustration. Actual configuration varies by specification.
Open product image ↗Prefabricated Substations
YB□-12/0.4 · Prefabricated substation
Prefabricated substation combining HV switching, a transformer and LV distribution. Define the assembly around your single-line diagram, feeder schedule and site layout.
- Model voltage designation
- 12 / 0.4 kV
- Arrangement
- European type
Price on enquiry · Configuration, quantity & destination
Supply scope, manufacturer information, applicable documents and warranty arrangements are confirmed in the quotation and order.
APPLICATION & DUTY
Where YB□-12/0.4 fits
YB prefabricated substations combine high-voltage switching, a transformer and low-voltage distribution in an integrated assembly. The arrangement is used for building, industrial and temporary supply projects. Each section is selected around the single-line diagram so transformer duty, feeder protection and the enclosure layout work together.
APPLICATION / 02
Industrial and infrastructure sites
For factories, airports, railways, ports and temporary installations where equipment scope and site interfaces can be defined together.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
Three coordinated equipment sections
High-voltage switching, transformer and low-voltage distribution are arranged as a coordinated package. The selected equipment determines the overall footprint and compartment layout.
DETAIL / 02
High-voltage switching choice
The technical information covers load-switch arrangements, including vacuum-switch options. Switch duty and transformer protection must be selected for the actual incoming circuit.
DETAIL / 03
Transformer integration
The capacity and voltage combination determine the transformer selection. Terminal positions, cooling and access requirements need to match the surrounding assembly.
DETAIL / 04
Low-voltage distribution scope
Define the main LV switching and each outgoing feeder from the project load schedule. Metering, compensation and control requirements should be included explicitly where required.
DEFINE THE SELECTED ASSEMBLY
Configuration & installation interfaces
Match the installation drawing, cable routes, clearances and electrical duty for the selected equipment.
Illustrative working scene- Single-line diagram
- Identify incoming circuits, transformer capacity and outgoing feeder ratings.
- Protection and metering
- Specify the metering location, protection arrangement and any auxiliary supply/control requirements.
- Installation environment
- The stated normal range is −25 to +40 °C with altitude up to 2,000 m; special conditions require a specified design.
Installation & connection checklist
- Provide foundation dimensions, cable trench/duct positions and entry directions.
- Identify access-door clearance, ventilation and equipment-removal space.
- State the delivery and unloading arrangement for the assembled equipment.
- Agree the single-line, layout and wiring drawings before order release.
Drawings & configuration documents
Send your selected rating and installation requirements to request the matching dimensional drawing, connection details and technical schedule.
DOCUMENTS · DELIVERY · SUPPORT
Technical coordination & after-sales enquiries
Explore transformer manufacturing ↗ · View equipment & application references ↗
Confirm the order documents
Agree the selected specifications, applicable drawings, inspection records and identification requirements in the quotation and order.
Coordinate delivery
Include quantity, destination, packing requirements and preferred trade terms. Confirm transport scope and the requested delivery schedule with the quotation.
Request technical support
For an existing unit, provide its model, nameplate or order reference and a description of the issue. Include relevant photos or records already available. Warranty and service scope follow the agreed order terms.
Contact about this model ↗START WITH WHAT YOU HAVE
Prepare a quotation for this equipment.
Choose your enquiry type. Start with the information you have.
Price on enquiry
Quotations are prepared for the selected configuration, quantity and destination. Currency, validity, delivery terms, freight and any applicable duties or taxes are specified in the quotation.
Project procurement
New installations & project tenders
Discuss a project ↗What to prepare
Send the single-line diagram, transformer duty, feeder schedule and site plan.
Distributor procurement
Model lists & repeat orders
Discuss supply requirements ↗What to prepare
Identify recurring electrical schemes, destination conditions and the required equipment scope.
Panel & equipment builders
Equipment integration & matching
Discuss an assembly ↗What to prepare
Provide civil, cable, ventilation and control interfaces for the complete substation arrangement.
Repair & replacement
Identify an existing unit or part
Identify a replacement ↗What to prepare
Send the existing layout, nameplates and available access; identify which sections will be retained.
Illustrative enquiry scenarios.
Selection checklist for YB□-12/0.4
- Single-line diagram and incoming network arrangement
- Transformer rating, outgoing feeder schedule and metering scheme
- Site dimensions, cable entry, access, ventilation and drainage
- Protection, control supply, communication and delivery scope
- Provide foundation dimensions, cable trench/duct positions and entry directions.
- Identify access-door clearance, ventilation and equipment-removal space.
- State the delivery and unloading arrangement for the assembled equipment.
- Agree the single-line, layout and wiring drawings before order release.
From enquiry to an agreed supply
- Share the requirementModel, duty, quantity and destination.
- Review the configurationResolve ratings, interfaces and site conditions.
- Agree the technical scheduleScope, drawings, tests, price and delivery terms.
- Confirm delivery documentsAgree packing, identification and the applicable inspection records.
Testing, warranty terms and after-sales scope are to be agreed in the quotation and order documents for the selected configuration.
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Model voltage designation: 12 / 0.4 kV
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Mingkong High & Low Voltage Switchgear Selection Guide · Updated 24 October 2026 · Chinese / English
For a quotation, include your required model, rating, quantity and operating conditions.