TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Local distribution upgrades
For replacement or capacity-upgrade enquiries where the existing voltage, connection and physical installation must be retained or deliberately changed.
MINGKONGmkelecsolution.com
Product illustration. Actual configuration varies by specification.
Open product image ↗Transformers
SM-NX1 · Oil-immersed distribution transformer
Sealed oil-immersed distribution transformer with a dedicated NX1 loss schedule.
- Brand
- Mingkong
- Model
- SM-NX1
- 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-NX1 fits
SM-NX1 is a sealed three-phase oil-immersed distribution transformer with a dedicated NX1 performance schedule. It is selected around the actual distribution voltage, load capacity and winding connection. The table distinguishes Dy and Yy load-loss entries where applicable, so the connection group belongs in the initial enquiry.
APPLICATION / 02
New distribution installations
For industrial and local distribution projects requiring an oil-immersed transformer and a defined loss schedule.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
Sealed oil system
The M designation identifies sealed construction. Tank arrangement, cooling surfaces, fittings and accessories should be reviewed on the selected rating’s drawing.
DETAIL / 02
Core and winding design
The design focuses on the core and winding arrangement associated with the NX1 loss schedule. The actual no-load and load-loss values are provided for each listed capacity.
DETAIL / 03
Connection-dependent losses
The table separates Dy and Yy values at relevant ratings. State the required group when comparing offers, together with the loss reference temperature.
DETAIL / 04
Capacity-dependent impedance
The displayed entries use 4% impedance through 500 kVA and 4.5% from 630 to 1,600 kVA. Select the complete rating combination for the distribution system.
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 options
- HV 10, 6.3 or 6 kV and LV 0.4 kV are listed.
- Taps and connection
- Specify ±5% or ±2 × 2.5% taps and Yyn0 or Dyn11 as appropriate.
- Accessory scope
- Identify the required terminal arrangement, monitoring, protection fittings and documents.
Installation & connection checklist
- Provide the mounting plan and available installation envelope.
- Identify HV/LV cable or busbar interfaces and phase arrangement.
- State outdoor exposure and any enclosure or containment requirements for site design review.
- For replacement, send the nameplate, tank dimensions and terminal photographs.
RATING DATA
Technical parameters
30–1,600 kVACapacity entries in this table
17Listed 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 | 505 | 480 | 80 | 4.0 | Request this rating ↗ |
| 50 | 1.3 | 730 | 695 | 100 | 4.0 | Request this rating ↗ |
| 63 | 1.2 | 870 | 830 | 110 | 4.0 | Request this rating ↗ |
| 80 | 1.2 | 1050 | 1000 | 130 | 4.0 | Request this rating ↗ |
| 100 | 1.1 | 1265 | 1200 | 150 | 4.0 | Request this rating ↗ |
| 125 | 1.1 | 1510 | 1440 | 170 | 4.0 | Request this rating ↗ |
| 160 | 1.0 | 1850 | 1760 | 200 | 4.0 | Request this rating ↗ |
| 200 | 1.0 | 2185 | 2080 | 240 | 4.0 | Request this rating ↗ |
| 250 | 0.9 | 2560 | 2440 | 290 | 4.0 | Request this rating ↗ |
| 315 | 0.9 | 3065 | 2920 | 340 | 4.0 | Request this rating ↗ |
| 400 | 0.8 | 3615 | 3440 | 410 | 4.0 | Request this rating ↗ |
| 500 | 0.8 | 4330 | 4120 | 480 | 4.0 | Request this rating ↗ |
| 630 | 0.6 | 4960 | 4960 | 570 | 4.5 | Request this rating ↗ |
| 800 | 0.6 | 6000 | 6000 | 700 | 4.5 | Request this rating ↗ |
| 1000 | 0.6 | 8240 | 8240 | 830 | 4.5 | Request this rating ↗ |
| 1250 | 0.5 | 9600 | 9600 | 970 | 4.5 | Request this rating ↗ |
| 1600 | 0.5 | 11600 | 11600 | 1170 | 4.5 | Request this rating ↗ |
Checked against the original transformer catalogue, PDF page 17, printed page 23. HV options: 10 / 6.3 / 6 kV; taps: ±5% or ±2 × 2.5%; LV: 0.4 kV; vector groups: Yyn0 / Dyn11. Catalogue efficiency designation is not a destination-market certification.
Technical sheets & drawings
Catalogue reference data for the labelled configuration. The agreed technical schedule defines the supplied equipment.
SM-NX1 rating table · original PDF p.17 View reference
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-NX1
- 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 mounting plan and available installation envelope.
- Identify HV/LV cable or busbar interfaces and phase arrangement.
- State outdoor exposure and any enclosure or containment requirements for site design review.
- For replacement, send the nameplate, tank dimensions and terminal photographs.
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.