TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Distribution replacement
For an existing installation, start with the nameplate and connection photographs so electrical and physical requirements can be compared.
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Product illustration. Actual configuration varies by specification.
Open product image ↗Transformers
SM-NX2 · Oil-immersed distribution transformer
Sealed oil-immersed distribution transformer with a dedicated NX2 rating table.
- Brand
- Mingkong
- Model
- SM-NX2
- Supply
- Factory supply
- Catalogue capacity
- 30–1,600 kVA
- LV rating
- 0.4 kV
- Construction
- Sealed oil immersed
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 SM-NX2 fits
SM-NX2 is a sealed oil-immersed distribution transformer series with its own no-load and load-loss schedule. The series should be specified using the required voltage combination, capacity, winding group and impedance. It supports a rating-based discussion for new distribution equipment and replacements.
APPLICATION / 02
Industrial and local supply
For new distribution loads where the site supply, transformer capacity and LV distribution arrangement are defined together.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
Sealed three-phase construction
The model identifies a sealed oil-immersed arrangement. The selected tank and terminal drawing establishes the physical supply configuration.
DETAIL / 02
NX2 performance schedule
No-load current, no-load loss and load loss are listed separately. Compare these at the same capacity and connection group when preparing a purchasing specification.
DETAIL / 03
Dy and Yy entries
The two load-loss columns distinguish winding-connection arrangements where applicable. The required vector group should be explicit in the enquiry and repeat-order reference.
DETAIL / 04
Tapping and impedance
The table identifies tapping alternatives and capacity-related impedance values. These should be retained with the model and kVA rating 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 with 0.4 kV LV.
- Electrical selection
- Provide frequency, Yyn0/Dyn11 requirement, tap range and required loss limits.
- Supply details
- Define terminal arrangement, monitoring accessories, inspection documents and packing requirements.
Installation & connection checklist
- Provide the foundation or mounting dimensions and available access.
- Identify cable/busbar connections and any existing interface constraints.
- State the site environment and exposure conditions.
- Request the matching technical schedule for a capacity not displayed in the table.
RATING DATA
Technical parameters
30–1,600 kVACapacity entries in this table
16Listed rating configurations
4.0 / 4.5%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 Dy (W) | Load loss Yy (W) | No-load loss (W) | Short-circuit impedance (%) | Enquiry |
|---|---|---|---|---|---|---|
| 30 | 1.5 | 630 | 600 | 80 | 4.0 | Request this rating ↗ |
| 50 | 1.3 | 910 | 870 | 100 | 4.0 | Request this rating ↗ |
| 63 | 1.2 | 1080 | 1040 | 110 | 4.0 | Request this rating ↗ |
| 80 | 1.2 | 1310 | 1250 | 130 | 4.0 | Request this rating ↗ |
| 100 | 1.1 | 1580 | 1500 | 150 | 4.0 | Request this rating ↗ |
| 125 | 1.1 | 1890 | 1800 | 170 | 4.0 | Request this rating ↗ |
| 160 | 1.0 | 2310 | 2200 | 200 | 4.0 | Request this rating ↗ |
| 200 | 1.0 | 2730 | 2600 | 240 | 4.0 | Request this rating ↗ |
| 315 | 0.9 | 3830 | 3650 | 340 | 4.0 | Request this rating ↗ |
| 400 | 0.8 | 4520 | 4300 | 410 | 4.0 | Request this rating ↗ |
| 500 | 0.8 | 5410 | 5150 | 480 | 4.0 | Request this rating ↗ |
| 630 | 0.6 | 6200 | 6200 | 570 | 4.5 | Request this rating ↗ |
| 800 | 0.6 | 7500 | 7500 | 700 | 4.5 | Request this rating ↗ |
| 1000 | 0.6 | 10300 | 10300 | 830 | 4.5 | Request this rating ↗ |
| 1250 | 0.5 | 12000 | 12000 | 970 | 4.5 | Request this rating ↗ |
| 1600 | 0.5 | 14500 | 14500 | 1170 | 4.5 | Request this rating ↗ |
Checked against original PDF page 18. HV: 10 / 6.3 / 6 kV; LV: 0.4 kV; taps: ±5% or ±2 × 2.5%; vector groups: Yyn0 / Dyn11. Only the listed ratings are shown; request the technical schedule for other ratings.
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 SM-NX2
- 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 the foundation or mounting dimensions and available access.
- Identify cable/busbar connections and any existing interface constraints.
- State the site environment and exposure conditions.
- Request the matching technical schedule for a capacity not displayed in the table.
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.