TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Building load centres
For commercial centres, hospitals, hotels and high-rise buildings. Selection should consider the electrical load together with the transformer-room footprint, ventilation and required noise limits.
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Product illustration. Actual configuration varies by specification.
Open product image ↗Transformers
SC(B)12 wound core · Wound-core dry-type transformer
Three-dimensional wound-core dry-type transformer for building distribution and infrastructure installations.
- Brand
- Mingkong
- Model
- SC(B)12 wound core
- Supply
- Factory supply
- Core
- Three-dimensional wound core
- Insulation
- Dry 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 SC(B)12 wound core fits
The SC(B)12 three-dimensional wound-core transformer combines resin-cast windings with a continuous wound magnetic-core structure. It is intended for building and infrastructure distribution where a dry-type transformer is specified. The wound-core construction is a defining part of the product and should be included in the enquiry and order description.
APPLICATION / 02
Transport facilities
For airports, stations, tunnels and metro-related distribution. Include the available delivery route, cable/busbar interfaces and space for inspection and maintenance.
APPLICATION / 03
Combined substations
For coordinated transformer-and-distribution assemblies. Match the transformer envelope and connections with the enclosure and switchgear layout.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
Continuous wound magnetic path
The three-dimensional core uses wound silicon-steel material rather than a conventional stacked-core arrangement. Its continuous magnetic path is a central construction feature; the actual no-load loss is identified by the selected rating in the table.
DETAIL / 02
Circular core cross-section
The core construction uses circular cross-sections. The associated winding and support arrangement should be considered as a complete assembly when reviewing dimensions, lifting access and replacement suitability.
DETAIL / 03
Vacuum-cast resin insulation
Resin is mixed and degassed before casting around the windings. The resulting cast body provides winding insulation, while reinforcing materials within the resin structure contribute to mechanical integrity.
DETAIL / 04
Winding reinforcement
Reinforcing insulation is incorporated around the cast winding structure. Electrical rating, insulation requirements and the specified test programme must be agreed for the delivered configuration.
DETAIL / 05
Dedicated wound-core performance data
The table contains 11 ratings from 250 to 2,500 kVA. The 250–500 kVA entries use 4% impedance, while the 630–2,500 kVA entries use 6%. Both the core version and the impedance belong in the technical schedule.
DEFINE THE SELECTED ASSEMBLY
Configuration & installation interfaces
Match the selected transformer to the room layout, terminal arrangement, cooling clearances and approved drawings.
Factory preparation photograph · reference assembly- Voltage combination
- Listed HV options are 10, 6.3 and 6 kV; LV is 0.4 kV. Specify the required operating frequency and actual network voltage.
- Connection and taps
- Dyn11 and Yyn0 are listed, with ±5% or ±2 × 2.5% tapping options. Select the required combination for the installation.
- Loss and noise requirements
- Use the table values as the rating reference. State any guaranteed loss, noise or partial-discharge limits that the project requires, together with test conditions.
- Auxiliary equipment
- Describe the enclosure, temperature-monitoring, alarm/trip and cooling requirements so the scope can be defined alongside the transformer.
Installation & connection checklist
- Request the outline drawing for the selected capacity, not only a general product photograph.
- Check terminal positions, cable/busbar entry and phase arrangement against the installation.
- Provide available footprint, access opening, lifting restrictions and ventilation layout.
- For replacement, submit the original nameplate, overall dimensions and terminal photographs.
- For repeat supply, keep the same core version, rating, impedance and approved drawing revision in the purchase reference.
RATING DATA
Technical parameters
250–2,500 kVACapacity entries in this table
11Listed rating configurations
4.0 / 6.0%Impedance options · see matching row
Compare the capacity and impedance together. You can start an enquiry from a specific row. On a small screen, scroll the table sideways.
| Capacity (kVA) | No-load current (%) | Load loss (W) | No-load loss (W) | Short-circuit impedance (%) | Enquiry |
|---|---|---|---|---|---|
| 250 | 1.10 | 2760 | 575 | 4.0 | Request this rating ↗ |
| 315 | 1.10 | 3470 | 705 | 4.0 | Request this rating ↗ |
| 400 | 1.10 | 3990 | 785 | 4.0 | Request this rating ↗ |
| 500 | 0.85 | 4880 | 930 | 4.0 | Request this rating ↗ |
| 630 | 0.85 | 5960 | 1040 | 6.0 | Request this rating ↗ |
| 800 | 0.85 | 6960 | 1215 | 6.0 | Request this rating ↗ |
| 1000 | 0.85 | 8130 | 1415 | 6.0 | Request this rating ↗ |
| 1250 | 0.85 | 9690 | 1670 | 6.0 | Request this rating ↗ |
| 1600 | 0.85 | 11730 | 1960 | 6.0 | Request this rating ↗ |
| 2000 | 0.70 | 14450 | 2440 | 6.0 | Request this rating ↗ |
| 2500 | 0.70 | 17170 | 2880 | 6.0 | Request this rating ↗ |
Wound-core series table, checked against original PDF page 11. HV: 10 / 6.3 / 6 kV; LV: 0.4 kV; vector groups: Dyn11 / Yyn0; taps: ±5% or ±2 × 2.5%. Use this table only for the wound-core construction.
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
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 load schedule, HV/LV voltages, kVA and site conditions. Identify loss limits, vector group and required tests.
Distributor procurement
Model lists & repeat orders
Discuss supply requirements ↗What to prepare
List preferred kVA and voltage combinations, destination requirements, quantities and spare-parts or documentation needs.
Panel & equipment builders
Equipment integration & matching
Discuss an assembly ↗What to prepare
Provide the substation or equipment layout, terminal positions, cooling arrangement and monitoring interfaces.
Repair & replacement
Identify an existing unit or part
Identify a replacement ↗What to prepare
Send the nameplate, existing dimensions, cable or busbar interfaces and the reason for replacement.
Illustrative enquiry scenarios.
Selection checklist for SC(B)12 wound core
- Required kVA, HV/LV voltages, frequency and vector group
- Tapping arrangement, impedance and required loss limits
- Indoor/outdoor site, ambient temperature, altitude and ventilation
- Cable or busbar connections, installation dimensions, monitoring and test documents
- Request the outline drawing for the selected capacity, not only a general product photograph.
- Check terminal positions, cable/busbar entry and phase arrangement against the installation.
- Provide available footprint, access opening, lifting restrictions and ventilation layout.
- For replacement, submit the original nameplate, overall dimensions and terminal photographs.
- For repeat supply, keep the same core version, rating, impedance and approved drawing revision in the purchase reference.
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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Mingkong Transformer Selection Guide · Updated 24 October 2026 · Chinese / English
For a quotation, include your required model, rating, quantity and operating conditions.
Plan your enquiry
Use these guides to prepare the information for equipment selection and quotation.