Product Overview
High-Performance Dry-Type Transformer from a Leading Chinese Manufacturer
The 20-35kV SCB series epoxy resin dry-type transformer is an effective answer for sensitive infrastructure, offering a fireproof solution for the distribution of electric power to urban grids, skyscrapers, tunnels, airports, railway stations, and metro stations. The epoxy resin casting ensures high insulation and resistance to moisture, and is characterized by low level of noise and high efficiency.
Applications & circuit protection
This type of dry transformer is fit for usage in indoors and sensitive installations where protection from fire, security and low maintenance are dominant concerns.
- Urban grids: MV distribution indoors.
- Transportation agencies: Airports, railways, undergrounds.
- Tall buildings: Fireproof transformer rooms.
- Commercial: Hospitals, schools and malls.
Construction & operating reliability
The incorporation of epoxy resin cast windings with clever design for fire resistance and oil-less technology leads to durable dielectric properties, moisture-resistant applications, reliable performance and maximum efficiency.
- Epoxy resin cast windings.
- Fire resistant and not using oil.
- High efficiency of greater than 99% under rated conditions.
- Low noise.
- F/H insulation types.
- IP20/IP23 protection level, can be customized.
Technical Parameter
| Parameter | Value |
| Rated capacity range | 50-2500 kVA |
| Voltage combination (HV) | 20 / 22 / 24 kV |
| Tap range | ±5% / ±2×2.5% |
| Voltage (LV) | 0.4 kV |
| Connection group | Yyn0 / Dyn11 |
| No-load loss (typical range) | 340-3600 W |
| Load loss (typical range) | 1230-27000 W |
| No-load current (typical range) | 0.5-2.2% |
| Short-circuit impedance | 6% |
| Voltage rating | 20 / 25 / 30 / 35 kV (primary) |
| Power rating | 500 – 2500 kVA (standard) |
| Rated frequency | 50/60 Hz |
| Insulation class | F / H |
| Cooling | AN / AF |
| Efficiency | ≥99% at rated load |
| Noise level | ≤65 dB (full load) |
| Protection | IP20 / IP23 (customizable) |
| Standard | IEC 60076 / GB 10228 |
Transformer Cost Factors & How to Get a Quote
The price of a Dry-Type Transformer varies based on several criteria including its capacity kVA, the input and output voltage, impedance, level of losses, the cooling medium, tap changer and other accessories. We provide indicative price range and offer particular quotes within one working day for the standard configuration. Distribution companies can request the current factory price list with price volume tiers.
- Standard price series according to price list of current factory
- Custom voltage/loss level per individual project
- Shipping, insurance and certification costs depend on the final destination
Transformer Wiring & Connection
HV and LV terminals of the Dry-Type Transformer are uniquely marked. The connection groups available include either Yyn0 or Dyn11, which is how the transformer connects to the network. HV bushings can take either standard blushing cables or busbar connections; LV terminals are made for easy and quick cabling. The connection diagrams are also included with each transformer.
- Dry-Type transformers have well-defined HV and LV terminals
- Dyn11 and Yyn0 connection pattern available
- Altering connection regulations provided with transformer
Compare with Other Transformer Options
Choose the right unit for your project:
| Feature | This Series | Alternative Option |
| Insulation | Oil-immersed / cast-resin as specified | Dry-type or amorphous alloy options |
| Capacity | Per specification (30-2500 kVA typical) | Higher ratings available on request |
| Mounting | Pole / pad / substation per model | Indoor or outdoor per enclosure |
| Loss level | Standard or low-loss series | Amorphous ultra-low loss option |
| Best for | Distribution and power projects | Energy-saving or space-limited sites |
Export Markets & Country Compatibility
The Dry-Type Transformer is exported to various markets such as Southeast Asia, the Middle East, Africa, Latin America, South Asia, and Europe. 50 Hz units are suitable for most international grids, while 60 Hz units can be adjusted as necessary for many markets such as North America and parts of the Middle East. The voltage combinations can be changed according to supply standards for different countries.
Transformer Dimensions, Weight & Packing
The weight and size depend upon the type, voltage and kVA rating of the unit. General estimates for distribution transformers show that a 100 kVA oil-immersed transformer has dimensions of around 1000-1200 mm in length, 500-700 mm in width and 1100-1400 mm in height, with weight between 600 and 900 kgs12. Full dimension and weight information is confirmed with the client when the order is placed and the units are packaged for transportation by land or sea
- Dimension drawing provided for final approval before manufacture
- Packaging in accordance with international standards with design and loading points indicated
- Make sure you provide the way of transport and delivery port
Standards & certifications
This transformer was made according to both IEC 60076 and GB 10228 standards. It can be provided with type-test reports for project certification.
- Standards used for the design: IEC 60076 / GB 10228.
- Type-test and routine-test reports are included.
- Insulation made from epoxy resin.
- Documentation required for certifications and approvals is available.
OEM & B2B supply support
Subian Electric, as a notable supplier of power equipment and a manufacturer has been of help in various infrastructure projects. Along with that, the company also offers assistance with transformers.
With that in mind, you are advised to contact us to know about specific anticipated capacities, voltages, or customized solutions you are looking for.
- Samples and technical drawings available.
- Flexible quantities for project purchasing.
- OEM / ODM support.
- Custom marking and packaging.
- Technical documentation and certification support.
Frequently Asked Questions
Why choose a dry-type transformer?
Resin dry-type transformers do not catch fire or contain any oils. They process low maintenance and thus can be used in closed and sensitive installations.
What are the available ratings?
Typically ranging from 500kVA to 2500kVA and from 20–35kV variable ratings are available.
Where is it commonly used?
Urban grid for housing complexes, hospitals, underground tunnels, airports, train stations and warehouses.
Do you provide certification documents?
We certainly provide type-testing and routine-testing reports in order to facilitate project approvals and make certifications in the market.
