Product Overview
Dependable Oil-Immersed Distribution Transformer from Subian Electric’s Xuzhou Factory
The oil-filled power distribution transformer that lies within the 6-10 kV range proves to be both an advantageous and efficient option for achieving the reduction of input voltage emanating from the source of 6 kV or 10 kV utilized for household, commercial, and industrial applications. Thus, in addition to its output power range lying between 30 and 2500 kVA, this transformer is characterized by being able to regulate its impedance thus delivering reliable operations of the power distribution system and minimizing losses incurred during the functioning of the distribution grid, making it a perfect option for customers’ projects.
Applications & circuit protection
The transformer is intended for use in distribution networks, residential areas, commercial entities, and light manufacturing with the aim of achieving effective step-down conversion.
- Electrification of rural areas: Supplying electricity to villages and small towns.
- Urban distribution: Supply of electricity to residential and business feeders.
- Supply to industry: Supplying power to factories and workshops.
- Network renewal projects: Network extension and reconstruction.
Construction & operating reliability
The high-quality silicon steel core, precise winding and oil cooling ensure stable and efficient operation in each prevailing weather.
- Oil immersion cooling system that eliminates heat.
- Voltage ratio varying between 4 and 6%.
- Insulation group F/H chosen according to requirements of specific conditions.
- The secondary voltage variations made according to the customer’s specifications.
- The low-loss core made for cheap production costs.
Technical Parameter
| Parameter | Value |
| Rated capacity range | 30-2500 kVA |
| Voltage combination (HV) | 6 / 6.3 / 10 / 10.5 / 11 kV |
| Tap range | ±5% / ±2×2.5% |
| Voltage (LV) | 0.4 / 0.69 kV |
| Connection group | Yyn0 / Dyn11 / Yzn11 |
| No-load loss (typical range) | 100-2400 W |
| Load loss (typical range) | 630-24000 W |
| No-load current (typical range) | 0.5-2.3% |
| Short-circuit impedance | 4% |
| Rated voltage | 6 kV / 10 kV (primary) |
| Rated capacity | 30 – 2500 kVA |
| Impedance voltage | 4% – 6% |
| Insulation class | F / H |
| Cooling method | Oil-immersed self-cooling |
| Frequency | 50/60 Hz |
| Standard | IEC 60076 / GB 1094 |
Transformer Price & Factory Quotation
We produce our items in the factory. The transformers are priced concerning their rating, combinations of voltage, types of the core and winding material, and quantities of the order. Large orders get special prices. The material price changes according to the market price, and we can quote or provide a written quotation for it. A price list for the Oil-Immersed Distribution Transformer can be provided for any capacities and volumes you wish.
- Thus, usage of OEM/ODM brands does not influence the transformer price.
- The spare core, spare transformer, and special packaging are separately charged
- FOB, CIF and DDP costs are available for shipping out of the country.
How to Connect This Transformer
Before you switch on the Oil-Immersed Distribution Transformer, ensure that the setting of the tap complies with the supply voltage as well as the connection pattern. The High Voltage bushing needs to be connected to the supply end and the Low Voltage terminals need to be connected at the load end. All the earth terminals of the transformer must be connected to the earth of the station as per local regulations.
- Check tap position before supplying power to transformer.
- High Voltage should be on the supply side and the Low Voltage should be on the load end.
- Ensure that earthing terminals are connected according to the local regulations.
This Transformer vs. Alternative Ratings
Compare typical configurations to select the correct rating:
| Item | This Product | Smaller / Larger Option |
| Capacity | As specified on this page | Lower or higher kVA available |
| Voltage | As specified | Other primary voltages available |
| Impedance | Per standard / custom | Adjusted to network requirements |
| Cooling | ONAN or AN/AF per type | Forced cooling option on request |
| Application | Distribution / power | Industrial, renewable or utility |
Export Markets & Country Compatibility
We offer oil-immersed distribution transformers to vendors, buyers, and contractors from various regions of Asia, Africa, the Middle East, Latin America, and Europe. Before production starts, we check the voltage, frequency, group connection, and certification standards for each destination.
Transformer Dimensions, Weight & Packing
Weight and size are determined based on the power and voltage ratings of transformers. Some approximate average indicators can be described based on the power transformer ratings. For example, the size of a 100 kVA oil-submerged transformer can be anywhere from 1000 mm to 1200 mm in length, 500 to 700 mm in width, and 1100 to 1400 mm in height whereas the shipping weight can be around 600 to 900 kg. The higher the rating, the bigger the sizes of the transformers. Specifications regarding the exact design and shipping weight are finalized when the order is placed. Shipping is done according to the regulations of shipping by land or sea.
- Design specifications are confirmed prior to the start of manufacturing.
- Shipping is done according to the international standards for shipping including marking angles, handles, and other aspects.
- Be sure to communicate methods of transportation and destination of shipping to ensure prompt delivery.
Standards & certifications
In accordance with IEC 60076 as well as GB 1094 regulations, certification for project approval can be given in the form of type testing reports.
- Design specifications: IEC60076 and GB 1094
- Type testing and field testing reports can be provided.
- Evidence has been provided for efficient operation.
- All necessary documents have been provided for certification and approvals.
OEM & B2B supply support
Subian Electric is the manufacturer and supplier of electrical equipment that provides power products and services to enterprises and organizations.
In case you need transformers with specific sizes, voltages or configurations, we ask you to provide us with technical specifications.
- Samples and designs upon your request.
- We can provide you with as many products as you need.
- OEM/ODM assistance.
- Private labelling and packaging services.
- We can provide technical documents and certificates.
Frequently Asked Questions
What is this transformer used for?
This transformer is intended to reduce the 6kV or 10kV electrical voltage to a level at which electricity can be used for domestic, commercial and industrial purposes.
What capacities are available?
The transformer comes with a wide capacity range from 30 kVA to 2500 kVA with the optional feature allowing adjusting the secondary voltage in the range from 0.4 kV to 10 kV.
What insulation class is offered?
This type of the transformer can be made with insulation classes F and H which can withstand very high temperature applications.
Do you provide test reports?
Yes. There are type test documents and routine test ones that are required for project implementation and market certification.
