TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Public and commercial buildings
For hospitals, hotels, theatres, shopping facilities and residential load centres. Review ventilation, access and the project’s acoustic requirements.
MINGKONGmkelecsolution.com
Product illustration. Actual configuration varies by specification.
Open product image ↗Transformers
SC(B)12 · Cast-resin dry-type transformer
Cast-resin dry-type transformer for electrical load centres in buildings and infrastructure.
- Brand
- Mingkong
- Model
- SC(B)12
- Supply
- Factory supply
- Construction
- Epoxy resin cast
- Selection
- Capacity, voltage, vector group and cooling
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 fits
SC(B)12 is a three-phase epoxy-resin cast transformer for building and infrastructure distribution. Its winding insulation and reinforced cast structure are combined with capacity-specific electrical data. Procurement should identify the required voltage combination, vector group, impedance and installation arrangement in addition to the SC(B)12 series name.
APPLICATION / 02
Transport and utility installations
For stations, airports, tunnels and combined substations. The equipment layout should allow access to terminals and specified monitoring accessories.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
Cast-resin winding insulation
The winding insulation uses an epoxy-resin casting process. Resin mixing and vacuum degassing prepare the mixture before casting, helping the insulation surround the winding and fill the spaces within the assembly.
DETAIL / 02
Reinforced winding construction
Reinforcing insulation materials are incorporated within the cast winding structure. The filled resin and reinforcement form a coordinated mechanical assembly around the winding; required short-circuit and insulation test documents should be specified for the selected design.
DETAIL / 03
Low-voltage winding selection
A foil-type low-voltage winding is an option identified in the series designation. Confirm the actual winding construction with the selected capacity, voltage combination and technical schedule.
DETAIL / 04
Performance by selected rating
The 30–2,500 kVA table identifies current and loss values for each rating. At 630 kVA, two impedance arrangements are listed; larger entries use the corresponding 6% configuration.
DETAIL / 05
Specify the core construction
This page covers the conventional SC(B)12 series. The three-dimensional wound-core version has a separate product page and performance table, so the core construction should be stated in quotations and repeat orders.
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 and connection
- The listed HV alternatives are 10, 6.3 and 6 kV with 0.4 kV LV, and Dyn11/Yyn0 connection alternatives.
- Thermal and accessory scope
- State cooling duty, enclosure, temperature monitoring and the control contacts needed by the building management or protection system.
- Documents for comparison
- Compare ratings using the same impedance, loss-reference temperature and agreed test requirements.
Installation & connection checklist
- Include terminal direction and cable or busbar connection details.
- Share room dimensions, maintenance access and delivery access restrictions.
- Identify the required core version on the purchase schedule.
- For replacement, supply the existing transformer nameplate and installation drawing.
RATING DATA
Technical parameters
30–2,500 kVACapacity entries in this table
19Listed 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 |
|---|---|---|---|---|---|
| 30 | 2.00 | 710 | 150 | 4.0 | Request this rating ↗ |
| 50 | 2.00 | 1000 | 215 | 4.0 | Request this rating ↗ |
| 80 | 1.50 | 1380 | 295 | 4.0 | Request this rating ↗ |
| 100 | 1.50 | 1570 | 320 | 4.0 | Request this rating ↗ |
| 125 | 1.30 | 1850 | 375 | 4.0 | Request this rating ↗ |
| 160 | 1.30 | 2130 | 430 | 4.0 | Request this rating ↗ |
| 200 | 1.10 | 2530 | 495 | 4.0 | Request this rating ↗ |
| 250 | 1.10 | 2760 | 575 | 4.0 | Request this rating ↗ |
| 315 | 1.00 | 3470 | 705 | 4.0 | Request this rating ↗ |
| 400 | 1.00 | 3990 | 785 | 4.0 | Request this rating ↗ |
| 500 | 1.00 | 4880 | 930 | 4.0 | Request this rating ↗ |
| 630 | 0.85 | 5880 | 1070 | 4.0 | Request this rating ↗ |
| 630 | 0.85 | 5960 | 1040 | 6.0 | Request this rating ↗ |
| 800 | 0.85 | 6960 | 1210 | 6.0 | Request this rating ↗ |
| 1000 | 0.85 | 8130 | 1410 | 6.0 | Request this rating ↗ |
| 1250 | 0.85 | 9690 | 1670 | 6.0 | Request this rating ↗ |
| 1600 | 0.85 | 11700 | 1960 | 6.0 | Request this rating ↗ |
| 2000 | 0.70 | 14440 | 2440 | 6.0 | Request this rating ↗ |
| 2500 | 0.70 | 17170 | 2880 | 6.0 | Request this rating ↗ |
10 kV-class catalogue table, checked against original PDF page 10. HV options: 10 / 6.3 / 6 kV; LV: 0.4 kV; vector groups: Dyn11 / Yyn0. Select the impedance and tapping arrangement together with the capacity. Loss-reference temperature and the final technical schedule are to be agreed.
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
- 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
- Include terminal direction and cable or busbar connection details.
- Share room dimensions, maintenance access and delivery access restrictions.
- Identify the required core version on the purchase schedule.
- For replacement, supply the existing transformer nameplate and installation drawing.
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.
Related catalogue series
MINGKONGmkelecsolution.com
Cast-resin dry-type transformer
Construction: Epoxy resin cast
View specifications ↗MINGKONGmkelecsolution.com
Cast-resin dry-type transformer
Construction: Epoxy resin cast
View specifications ↗
MINGKONGmkelecsolution.com
Dry-type power transformer
Voltage classes: 10 / 20 / 35 kV
View specifications ↗
MINGKONGmkelecsolution.com
Wound-core dry-type transformer
Core: Three-dimensional wound core
View specifications ↗Product catalogue
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.