TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Regulating substations
For projects where the voltage-regulation requirement calls for an on-load tap-changing transformer. Supply the grid and downstream-voltage requirements.
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Product illustration. Actual configuration varies by specification.
Open product image ↗Transformers
SZ11 · 35 kV · 35 kV on-load tap-changing transformer
35 kV oil-immersed power transformer with on-load tap regulation for substation duties.
- Brand
- Mingkong
- Model
- SZ11 · 35 kV
- Supply
- Factory supply
- Voltage class
- 35 kV
- Catalogue capacity
- 2,000–20,000 kVA
- Tap regulation
- On-load
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 SZ11 · 35 kV fits
SZ11 35 kV is an oil-immersed power transformer with on-load voltage regulation. It is intended for substation duties that require a regulating arrangement during operation. The transformer rating, tap range, tap-changer control and associated electrical interfaces need to be specified as one configuration.
APPLICATION / 02
Industrial power supply
For industrial substation enquiries combining transformer capacity, changing load conditions and a specified voltage-control scheme.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
On-load tap regulation
The Z designation identifies the regulating version. The required number of steps, range and control functions belong in the transformer specification.
DETAIL / 02
Dedicated performance series
The SZ11 schedule is separate from the S11 off-circuit series. Capacity, vector group and impedance vary with the selected configuration.
DETAIL / 03
Transformer and controller interfaces
The tap-changing equipment and its control supply must be coordinated with the station control scheme. Identify required local/remote control, indications and external signals.
DETAIL / 04
Rating-specific physical arrangement
Tap-changing equipment affects the supplied arrangement. The illustration represents the transformer family; use the approved outline and connection drawings for installation planning.
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 duty
- Specify kVA, HV/LV combination, frequency, vector group, impedance and loss limits.
- Regulating scope
- State tap range, step size, control supply and the required regulation/control scheme.
- Documentation
- Request the transformer schedule, tap-control schematic and applicable inspection/test records.
Installation & connection checklist
- Identify control-system communication or hardwired signal requirements.
- Provide foundation, access and terminal-layout constraints.
- Define the required accessory, protection and cooling scope.
- For replacement, supply the full tap-changer and transformer references, not only the SZ11 prefix.
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 SZ11 · 35 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
- Identify control-system communication or hardwired signal requirements.
- Provide foundation, access and terminal-layout constraints.
- Define the required accessory, protection and cooling scope.
- For replacement, supply the full tap-changer and transformer references, not only the SZ11 prefix.
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.