Product Overview
Fire-Safe Dry-Type Transformer from a Leading Chinese Manufacturer
The SCB epoxy resin dry-type transformer belongs to the category of 20-35 kV transformers. The design of this transformer is suitable for places with critical infrastructure where there is a high demand for fire safety and reliability like power supply system in an urban area, high rise buildings, commercial centers, hospitals, tunnels, airports, railway stations and underground metro. Since the transformer is made from epoxy resin cast winding, it has a better insulating property against humidity, and there is no risk of fire caused by any oil spilling.
Applications & circuit protection
This dry-type transformer is appropriate for indoor use or installations that require protection without damaging them.
- Urban networks: Indoor medium-voltage distribution in close proximity.
- Tall buildings: Transformer rooms without fire hazards.
- Transportation: Tunnels, airports, railway and subway networks.
- Commercial: medical facilities, schools, shopping centres.
Construction & operating reliability
Epoxy resin casting encases the windings, ensuring excellent insulation properties, water resistance, and mechanical protection accompanied by low noise and low partial discharge level.
- Using epoxy resin for windings to ensure fire safety.
- Does not require oil for application in critical environments.
- Excellent efficiency of no less than 99% at operating mode.
- Operation with low noise.
- Protection according to IP20/IP23 standard, customizable.
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 ultimate price of a Dry-Type Transformer is determined by its size (kVA), primary/secondary voltage, impedance, amount of losses, cooling method, tap changer and accessories that may be included with the transformer. Those looking for estimates of the price of transformers will find good starting points or official prices from us if valid specifications are provided. The agents or businesspersons can ask us for the factory price list.
- General series priced from the factory price list
- Unique losses or voltage levels quoted on customer requests
- Prices for shipping, insurance and certification depend on destination
Transformer Wiring & Connection
The Dry-Type Transformer comes readily identifiable HV and LV connectors. The arrangement of Yyn0 and Dyn11 connection group specifies how the device connects into your network. The high voltage (HV) bushing facilitates the use of standardized cable lug and busbar connectors; while the low voltage (LV) terminals allow for quick installation. The transformer comes with detailed connection diagrams.
- Indications of HV and LV terminals according to IEC/GB standards
- Dyn11 and Yyn0 connection group availability
- Connection diagrams and termination layout included with each device
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
Dry-type transformers are available in different types of markets including South East Asia, Middle East, Africa, Latin America and Southern Asia, Europe. 50 Hz system is highly preferable amongst all international electric grids while 60 Hz can be used in some of the parts of the Middle East and North America.
Transformer Dimensions, Weight & Packing
Size and weight depend on capacity, voltage and model. Typical approximate values for distribution ratings: 100 kVA oil-immersed units are roughly 1000-1200 mm long x 500-700 mm deep x 1100-1400 mm high with weight when shipped between 600-900 kg; other ratings have their dimensions scaled accordingly. Full dimension drawings and shipping weights are confirmed during order confirmation, and units are packaged for transport either by sea or by land.
- Dimension drawings provided for approval before production
- Packaged according to export standard with lifting points indicated
- Please confirm your mode of transport and port for delivery
Standards & certifications
This transformer is manufactured in accordance with IEC 60076 and GB 10228 and is supplied with type-testing reports for project approval.
- Design standard: IEC 60076 / GB 10228.
- Type-testing and routine testing reports available.
- Epoxy resin cast insulation confirmed.
- Certification and approval documentation provided.
OEM & B2B supply support
Subian Electric is a reputable manufacturer and distributor of high-quality power installations. The company assists in the completion of infrastructure development projects by providing transformers and other technical support.
If you are looking for a specific transformer or customize in terms of its outputs, feel free to provide your specifications and tell us your order volume.
- We offer engineering samples and blueprints.
- Low-volume order options are available.
- OEM and ODM services are offered.
- Specialized assembly and marking is available.
- Documentation compliance and certification is our responsibility.
Frequently Asked Questions
Why choose a dry-type transformer?
Epoxy resin dry-type transformers are resistant to fire, have no oil and are easier to maintain. Hence, they are best used in indoor and vulnerable installations.
What are the available ratings?
Generally speaking, the range of standard ratings is between 500kVA to 2500kVA at 20-35kV with other possibilities as per request.
Where is it commonly used?
In municipalities, skyscrapers, healthcare institutions, tunnels, airports, railway stations, metros, ports, and underground power stations.
Do you provide certification documents?
Yes, type-testing and routine testing reports are available for your project approval and market certification.
