Product Overview
Industrial-Grade Oil-Immersed Distribution Transformer from Subian Electric’s Xuzhou Factory
20kV oil-immersed distribution transformers are designed for industrial applications like real estate, oil, metallurgy, chemicals, and light industries operating on 20 kV frequency of 50 Hz AC. Thanks to its tank resistant to corrosion, oil cooling and low-loss design, it offers stable and reliable power transport in difficult conditions.
Applications & circuit protection
This transformer is appropriate for industries and electricity distribution networks where dependable 20kV step-down changes are necessary.
- Industries: Oil, metal and chemistry.
- Construction: Building and extensive supply.
- Light industry: Manufacturing and conversion.
- Utilities: 20kV distribution systems.
Construction & operating reliability
The efficient performance and reliable operation of the equipment is guaranteed by using corrosion-resistant steel tank design, system of oil cooling characterized by self-circulation and the core design having a long-life experience.
- Self-circulating oil cooling system.
- Corrosion-resistant steel tank.
- Core and winding design with minimum losses.
- Constant output under work load in industrial environments.
- Reliable operation in hard conditions.
Technical Parameter
| Parameter | Value |
| Rated capacity range | 30-2500 kVA |
| Voltage combination (HV) | 20 kV |
| Tap range | ±5% / ±2×2.5% |
| Voltage (LV) | 0.4 kV |
| Connection group | Yyn0 / Dyn11 / Yzn11 |
| No-load loss (typical range) | 100-2800 W |
| Load loss (typical range) | 690-29000 W |
| No-load current (typical range) | 0.5-2.1% |
| Short-circuit impedance | 5.5% |
| Rated voltage | 20 kV (primary) |
| Rated capacity | 30 – 2500 kVA |
| Rated frequency | 50 Hz |
| Cooling method | ONAN (oil natural, air natural) |
| Application | Industrial and utility distribution |
| Standard | IEC 60076 / GB 1094 |
Transformer Cost Factors & How to Get a Quote
The ultimate cost of an oil-cooled distribution transformer will rely on the power / capacity in kVA., the input & output voltages, the levels of impedance and losses, the method of cooling, the type of tap changer and any functional accessories. We can provide customer indicative price ranges and issue official quotations in just one working day for regular specifications. Dealers may request our current price list.
- Standard product series prices according to our standard price list
- Custom voltage / loss levels depending on project
- Transport and insurance costs depend on final destination
How to Connect This Transformer
Make certain that tap position is correct for supply voltage before turning on the Oil-Filled Distribution Transformer and that connection group is appropriate as well. The HV caps are connected on the side of supply and the LV terminals on the side of the load. Earth terminals need to be connected in accordance with the local regulations.
- Confirm tap position with supply voltages
- Connect HV and LV terminals
- Connect earthing terminal according to local rules
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 provide Oil-Immersed Distribution Transformer to distributors, power companies and project customers throughout Asia, Africa, Middle East, Latin America and Europe. We check the necessary voltage, frequency, connections and certification for every destination before production.
Transformer Dimensions, Weight & Packing
The dimensions and weight depend on capacity, voltage, and the type of transformer. Generally, approximate values for distribution transformers are as follows: transformers with ratings of 100 kVA have external dimensions ranging from 1000 mm to 1200 mm long, from 500 mm to 700 mm deep, and from 1100 mm to 1400 mm high. The approximate weight of such units is 600 kg to 900 kg. Larger ratings will vary accordingly. The exact dimensions are confirmed with the customer at the ordering stage, and transformers are packed for the mode of transportation.
- Dimension drawings presented for the customer’s approval before manufacturing begins
- Packing is done according to shipping standards with lifting points specified
- The customer is requested to inform about the mode of transportation and destination port
Standards & certifications
Fabricated under IEC 60076 and GB 1094, this transformer comes with type test reports for project clearance.
- Design code: IEC 60076/GB 1094.
- Documentation of type test and routine test reports is available.
- Good low loss design confirmed.
OEM & B2B supply support
Subian Electric is a reputable manufacturer of power equipment supplying equipment to industrial or individual customers, wholesalers and distributors of electrical products and services.
If you need help with regard to certain voltage or capacities or special variants of units, please reach out to us.
- Prototype samples and drawings are available.
- Minimum order quantities are not necessary.
- Original equipment manufacturing and product development are offered.
- Private labelling and unique packaging options are offered.
- Technical documentation and certifications are issued.
Frequently Asked Questions
What is this transformer used for?
It reduces 20kV of primary voltage for utility and industrial distribution purposes.
What capacities are available?
The transformer can handle power ratings between 30 and 2500kVA at 20kV and 50Hz.
What cooling method is used?
ONAN (Oil Natural Air Natural) cooling gives easy and effective heat dissipation.
Do you provide test reports?
Yes, we do have test reports available for this project including type test reports and routine test reports.
