TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Commercial and public buildings
For transformer rooms serving offices, hospitals, hotels and commercial centres. Include the room layout, ventilation arrangement and building noise requirements in the specification.
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Product illustration. Actual configuration varies by specification.
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SC(B)-NX1 · Cast-resin dry-type transformer
Cast-resin dry-type transformer with catalogue ratings from 30 to 2,500 kVA for building and infrastructure distribution. Select the voltage combination, impedance and loss limits for your project.
- Brand
- Mingkong
- Model
- SC(B)-NX1
- Supply
- Factory supply
- Construction
- Epoxy resin cast
- Catalogue capacity
- 30–2,500 kVA
- LV rating
- 0.4 kV
- Vector groups
- Dyn11 / Yyn0
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)-NX1 fits
SC(B)-NX1 is a three-phase cast-resin transformer for distributing power close to building and infrastructure loads. Selection combines the required capacity with the primary and secondary voltages, winding connection, impedance and loss limits. The NX1 designation identifies this performance series; the actual operating requirement is defined by the selected rating.
APPLICATION / 02
Transport and urban infrastructure
For stations, airports, tunnels and combined substations. Review equipment access, connection direction and maintenance space alongside the electrical rating.
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
Rating-specific loss selection
The table covers 30–2,500 kVA and separates no-load loss, load loss and no-load current. Comparing these quantities at the same capacity and impedance helps purchasers define a consistent technical basis for quotations.
DETAIL / 05
Capacity and impedance together
The 630 kVA entries have different impedance and loss combinations. Identify the required row when enquiring, rather than specifying capacity alone; the surrounding distribution design determines the appropriate impedance.
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- Primary and secondary
- Listed HV options are 10, 6.3 and 6 kV with 0.4 kV LV. State the actual network voltage and any different secondary requirement.
- Winding connection
- Dyn11 and Yyn0 are listed alternatives. Provide the required connection group and any parallel-operation requirement.
- Loss specification
- Send the destination-market loss requirement and reference temperature. Include any requested noise or partial-discharge acceptance limits for agreement.
Installation & connection checklist
- State cable or busbar connections and their entry direction.
- Provide transformer-room dimensions, access openings and lifting restrictions.
- Identify enclosure, temperature indication, alarm/trip contacts and cooling requirements.
- For replacement, include the nameplate, terminal photographs and existing mounting dimensions.
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 | 640 | 135 | 4.0 | Request this rating ↗ |
| 50 | 2.00 | 900 | 195 | 4.0 | Request this rating ↗ |
| 80 | 1.50 | 1240 | 265 | 4.0 | Request this rating ↗ |
| 100 | 1.50 | 1415 | 290 | 4.0 | Request this rating ↗ |
| 125 | 1.30 | 1665 | 340 | 4.0 | Request this rating ↗ |
| 160 | 1.30 | 1915 | 385 | 4.0 | Request this rating ↗ |
| 200 | 1.10 | 2275 | 445 | 4.0 | Request this rating ↗ |
| 250 | 1.10 | 2485 | 515 | 4.0 | Request this rating ↗ |
| 315 | 1.00 | 3125 | 635 | 4.0 | Request this rating ↗ |
| 400 | 1.00 | 3590 | 705 | 4.0 | Request this rating ↗ |
| 500 | 1.00 | 4390 | 835 | 4.0 | Request this rating ↗ |
| 630 | 0.85 | 5290 | 965 | 4.0 | Request this rating ↗ |
| 630 | 0.85 | 5365 | 935 | 6.0 | Request this rating ↗ |
| 800 | 0.85 | 6265 | 1095 | 6.0 | Request this rating ↗ |
| 1000 | 0.85 | 7315 | 1275 | 6.0 | Request this rating ↗ |
| 1250 | 0.85 | 8720 | 1505 | 6.0 | Request this rating ↗ |
| 1600 | 0.85 | 10555 | 1765 | 6.0 | Request this rating ↗ |
| 2000 | 0.70 | 13005 | 2195 | 6.0 | Request this rating ↗ |
| 2500 | 0.70 | 15455 | 2590 | 6.0 | Request this rating ↗ |
10 kV-class catalogue table, checked against original PDF page 6. 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
Explore transformer manufacturing ↗ · View equipment & application references ↗
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)-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
- State cable or busbar connections and their entry direction.
- Provide transformer-room dimensions, access openings and lifting restrictions.
- Identify enclosure, temperature indication, alarm/trip contacts and cooling requirements.
- For replacement, include the nameplate, terminal photographs and existing mounting dimensions.
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.