TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Buildings and transport facilities
For transformer installations serving hospitals, commercial centres, stations, airports and similar electrical loads.
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Product illustration. Actual configuration varies by specification.
Open product image ↗Transformers
SG(B)10 · Open-wound dry-type transformer
Non-encapsulated dry-type transformer with an impregnated insulation system for building and industrial installations.
- Brand
- Mingkong
- Model
- SG(B)10
- Supply
- Factory supply
- Construction
- Non-encapsulated dry type
- Loss reference classes
- B / F / H
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 SG(B)10 fits
SG(B)10 is a non-encapsulated dry-type transformer with an impregnated winding insulation system. It is used for building and industrial power distribution where winding construction, thermal class and installation conditions need to be specified together. The performance table distinguishes the loss reference temperatures for the listed insulation classes.
APPLICATION / 02
Industrial installations
For plants where the insulation system, load duty and site environment are defined in the project specification.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
Continuous high-voltage winding
The high-voltage winding uses a continuous construction. Winding geometry and insulation treatment form part of the transformer’s electrical and thermal design.
DETAIL / 02
Foil winding and ceramic supports
The low-voltage winding is foil wound, with ceramic supports used in the winding assembly. Terminal details and mounting arrangements should be reviewed on the selected unit’s drawing.
DETAIL / 03
Vacuum impregnation and curing
The winding system is treated by vacuum impregnation and curing. NOMEX insulation is identified for the construction; specify the intended insulation system and thermal class in the order schedule.
DETAIL / 04
Compare losses at the right temperature
The table lists B/100 °C, F/120 °C and H/145 °C load-loss columns. These reference temperatures are distinct from the insulation class designation and must accompany comparisons.
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- Thermal class
- Select the required insulation class and loss-reference basis.
- Electrical rating
- Provide capacity, HV/LV combination, frequency, winding group, impedance and tap requirements.
- Load duty
- Describe continuous load, fluctuations and any overload requirement for a specific thermal assessment.
Installation & connection checklist
- Provide enclosure and ventilation requirements.
- State environmental exposure, including moisture, dust and corrosive contaminants.
- Specify monitoring and protection contacts needed by the installation.
- Request the capacity-specific dimensional drawing for replacement or enclosure integration.
RATING DATA
Technical parameters
250–2,500 kVACapacity entries in this table
14Listed rating configurations
4.0 / 6.0 / 8.0%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 loss (W) | Load loss B / 100°C (W) | Load loss F / 120°C (W) | Load loss H / 145°C (W) | Short-circuit impedance (%) | Enquiry |
|---|---|---|---|---|---|---|
| 250 | 720 | 2590 | 2760 | 2960 | 4.0 | Request this rating ↗ |
| 315 | 880 | 3270 | 3470 | 3730 | 4.0 | Request this rating ↗ |
| 400 | 980 | 3750 | 3990 | 4280 | 4.0 | Request this rating ↗ |
| 500 | 1160 | 4590 | 4880 | 5230 | 4.0 | Request this rating ↗ |
| 630 | 1340 | 5530 | 5880 | 6290 | 4.0 | Request this rating ↗ |
| 630 | 1300 | 5610 | 5960 | 6400 | 6.0 | Request this rating ↗ |
| 800 | 1520 | 6550 | 6960 | 7460 | 6.0 | Request this rating ↗ |
| 1000 | 1770 | 7650 | 8130 | 8760 | 6.0 | Request this rating ↗ |
| 1250 | 2090 | 9100 | 9690 | 10370 | 6.0 | Request this rating ↗ |
| 1600 | 2450 | 11000 | 11700 | 12500 | 6.0 | Request this rating ↗ |
| 2000 | 3050 | 13600 | 14400 | 15500 | 6.0 | Request this rating ↗ |
| 2500 | 3600 | 16100 | 17100 | 18400 | 6.0 | Request this rating ↗ |
| 2000 | 3050 | 15000 | 15900 | 17100 | 8.0 | Request this rating ↗ |
| 2500 | 3600 | 17700 | 18800 | 20200 | 8.0 | Request this rating ↗ |
Checked against original PDF page 15. B, F and H loss columns use reference temperatures of 100, 120 and 145 °C respectively. Only the listed capacity/impedance combinations are shown; request a technical schedule for other configurations.
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 SG(B)10
- 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
- Provide enclosure and ventilation requirements.
- State environmental exposure, including moisture, dust and corrosive contaminants.
- Specify monitoring and protection contacts needed by the installation.
- Request the capacity-specific dimensional drawing for replacement or enclosure integration.
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.