TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Industrial distribution
The application scope includes petroleum, metallurgy, chemical, textile and light-industry distribution. Site contamination and installation conditions remain part of the selection.
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Product illustration. Actual configuration varies by specification.
Open product image ↗Transformers
S11 / S13 · 20 kV · 20 kV oil-immersed transformer
Oil-immersed distribution transformer family for 20 kV-class networks and industrial loads.
- Brand
- Mingkong
- Model
- S11 / S13 · 20 kV
- Supply
- Factory supply
- S13 table HV options
- 20 / 22 / 24 kV
- Frequency stated
- 50 Hz
- 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 S11 / S13 · 20 kV fits
The S11/S13 20 kV-class family covers sealed oil-immersed distribution-transformer enquiries for industrial and local networks. The actual primary voltage and performance series must be specified together. The reference data currently displayed on this page relates to the S13 voltage-class configuration.
APPLICATION / 02
20 kV-class network connections
For projects using a higher distribution-voltage class than conventional 10 kV equipment. State the actual system voltage and required LV output.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
Laminated magnetic core
The core uses grain-oriented silicon-steel laminations. Core and winding selection are coordinated with the required voltage class and performance series.
DETAIL / 02
Concentric winding arrangement
Concentric windings are described for the construction. Electrical connection group and terminal layout should be defined for the particular rating.
DETAIL / 03
Off-circuit voltage adjustment
The tapping arrangement is selected to suit the network-voltage requirement. Specify the requested tap range with the primary-voltage combination.
DETAIL / 04
Corrugated tank arrangement
Corrugated tank surfaces provide the described cooling and oil-volume accommodation arrangement. The final outline and accessories are rating dependent.
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- Series and primary voltage
- Identify S11 or S13 and the actual primary voltage. The displayed S13 reference includes 20/22/24 kV alternatives.
- Complete electrical rating
- Provide kVA, LV voltage, vector group, frequency, impedance and required losses.
- Accessories and protection
- Define temperature indication, protective fittings and required terminal arrangement for the proposed unit.
Installation & connection checklist
- Provide the existing network and installation drawing for replacement projects.
- Confirm insulation/clearance requirements with the selected voltage class.
- Identify cooling-space and maintenance-access constraints.
- Request a separate model-specific schedule when an S11 configuration is required.
Technical sheets & drawings
Catalogue reference data for the labelled configuration. The agreed technical schedule defines the supplied equipment.
S13-M 20 kV table only · original PDF p.19 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 S11 / S13 · 20 kV
- 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 existing network and installation drawing for replacement projects.
- Confirm insulation/clearance requirements with the selected voltage class.
- Identify cooling-space and maintenance-access constraints.
- Request a separate model-specific schedule when an S11 configuration is required.
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.