TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Buildings with varying loads
For commercial buildings, hospitals and transport facilities. Include the expected load profile, ventilation arrangement and installation environment.
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Product illustration. Actual configuration varies by specification.
Open product image ↗Transformers
SG(Z)(B)11 · Open-wound dry-type transformer
H-class non-encapsulated dry-type transformer for building and industrial distribution.
- Brand
- Mingkong
- Model
- SG(Z)(B)11
- Supply
- Factory supply
- Voltage class
- 10 kV
- Insulation class
- H
- Construction
- Non-encapsulated
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(Z)(B)11 fits
SG(Z)(B)11 is a non-encapsulated H-class dry-type transformer family using an impregnated insulation system. It is intended for building and industrial distribution. The full model configuration should identify whether on-load regulation is required, as well as the winding connection, voltage combination and thermal duty.
APPLICATION / 02
Industrial distribution
For plant transformer installations where insulation construction, load duty and voltage regulation need to be coordinated.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
NOMEX winding insulation
The windings use a NOMEX-based insulation system. The selected construction combines the insulation materials with impregnation and curing to form the winding assembly.
DETAIL / 02
Vacuum-pressure impregnation
Repeated impregnation and heat curing are described for the winding system. This differs from a fully resin-encapsulated winding and is an important construction detail for specification.
DETAIL / 03
Continuous high-voltage coils
The high-voltage winding uses a continuous structure with heat-dissipation considerations. Cooling, enclosure and the actual site temperature should be reviewed together.
DETAIL / 04
On-load regulation designation
The model description includes Z for on-load voltage regulation. Specify whether this function is required and include the tap range and control requirements in the enquiry.
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- Electrical combination
- The displayed table covers HV 6–10 kV, LV 0.4 kV and Yyn0/Dyn11 alternatives.
- Tapping
- The table lists ±2 × 2.5%; a required on-load regulating arrangement must be specified separately with the full variant.
- Impedance and duty
- Select the applicable capacity/impedance row and state the operating load profile and thermal requirements.
Installation & connection checklist
- Identify tap-control interfaces where an on-load arrangement is required.
- Provide ventilation, enclosure and terminal-layout requirements.
- State site altitude, temperature and moisture or contamination exposure.
- Use the exact model suffix and approved wiring arrangement for replacements.
RATING DATA
Technical parameters
30–2,500 kVACapacity entries in this table
21Listed 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 current (%) | Load loss (W) | No-load loss (W) | Short-circuit impedance (%) | Enquiry |
|---|---|---|---|---|---|
| 30 | 2.4 | 760 | 170 | 4.0 | Request this rating ↗ |
| 50 | 2.4 | 1070 | 240 | 4.0 | Request this rating ↗ |
| 80 | 1.8 | 1480 | 330 | 4.0 | Request this rating ↗ |
| 100 | 1.8 | 1690 | 360 | 4.0 | Request this rating ↗ |
| 125 | 1.6 | 1980 | 420 | 4.0 | Request this rating ↗ |
| 160 | 1.6 | 2280 | 480 | 4.0 | Request this rating ↗ |
| 200 | 1.4 | 2710 | 550 | 4.0 | Request this rating ↗ |
| 250 | 1.4 | 2960 | 640 | 4.0 | Request this rating ↗ |
| 315 | 1.2 | 3730 | 790 | 4.0 | Request this rating ↗ |
| 400 | 1.2 | 4280 | 880 | 4.0 | Request this rating ↗ |
| 500 | 1.2 | 5230 | 1040 | 4.0 | Request this rating ↗ |
| 630 | 1.0 | 6290 | 1200 | 4.0 | Request this rating ↗ |
| 630 | 1.0 | 6400 | 1170 | 6.0 | Request this rating ↗ |
| 800 | 1.0 | 7460 | 1360 | 6.0 | Request this rating ↗ |
| 1000 | 1.0 | 8760 | 1590 | 6.0 | Request this rating ↗ |
| 1250 | 1.0 | 10370 | 1880 | 6.0 | Request this rating ↗ |
| 1600 | 1.0 | 12580 | 2200 | 6.0 | Request this rating ↗ |
| 2000 | 0.8 | 15560 | 2740 | 6.0 | Request this rating ↗ |
| 2500 | 0.8 | 18450 | 3240 | 6.0 | Request this rating ↗ |
| 2000 | 0.8 | 17110 | 2740 | 8.0 | Request this rating ↗ |
| 2500 | 0.8 | 20290 | 3240 | 8.0 | Request this rating ↗ |
Checked against original PDF page 16. HV: 6–10 kV; taps: ±2 × 2.5%; LV: 0.4 kV; vector groups: Yyn0 / Dyn11. Only the listed capacity/impedance combinations are shown.
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(Z)(B)11
- 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
- Identify tap-control interfaces where an on-load arrangement is required.
- Provide ventilation, enclosure and terminal-layout requirements.
- State site altitude, temperature and moisture or contamination exposure.
- Use the exact model suffix and approved wiring arrangement for replacements.
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.