The SCB-400kVA 10kV/0.4kV dry type transformer** is a cast-resin distribution transformer designed for safe and reliable power distribution in commercial buildings, industrial facilities, infrastructure projects, renewable-energy systems, data centers and other indoor or environmentally sensitive applications. With a **10kV primary voltage, 0.4kV secondary voltage and 200kVA rated capacity**, the transformer provides efficient voltage conversion without using insulating oil.

The SCB series uses **cast-resin insulation**, which provides good electrical insulation, low maintenance requirements and enhanced fire safety compared with conventional oil-immersed transformers. It is suitable for applications where fire protection, environmental safety, compact installation and reliable operation are important.

1. Main Advantages

1.1 Oil-Free and Environmentally Friendly

The transformer does not use transformer oil as the primary insulation medium, eliminating the risks associated with oil leakage and reducing environmental concerns. This makes it suitable for buildings, factories, underground facilities and other locations with strict environmental requirements.

1.2 High Fire Safety

Cast-resin dry-type transformers have good flame-retardant characteristics and do not present the same oil-fire risk as oil-filled transformers. They are therefore widely used in commercial buildings, hospitals, airports, metro systems, shopping centers and other fire-sensitive facilities.

1.3 Low Maintenance

The sealed cast-resin insulation system significantly reduces the need for routine maintenance related to insulating oil. There is no need for oil filling, oil purification or regular oil-level inspection.

1.4 Reliable Electrical Insulation

The cast-resin winding structure provides strong insulation performance and good resistance to moisture, dust and common industrial environmental conditions when properly designed and installed.

1.5 Compact Installation

Compared with many oil-immersed transformer installations requiring oil containment and additional fire-safety measures, a dry-type transformer can simplify indoor installation and reduce associated infrastructure requirements.

1.6 Suitable for Modern Power Distribution

The 200kVA capacity and 10kV/0.4kV voltage ratio make this model suitable for medium-voltage distribution systems supplying factories, commercial buildings, infrastructure facilities and local distribution networks.

2. Key Features

* Rated capacity: **200kVA**
* Primary voltage: **10kV**
* Secondary voltage: **0.4kV / 400V**
* Transformer type: **Cast-resin dry-type transformer**
* Three-phase distribution transformer
* **50Hz** standard operating frequency
* **Copper or aluminum windings** according to customer requirements
* Cast-resin insulation system
* Air natural cooling (**AN**) as standard
* Optional forced-air cooling (**AF**) where required
* Low losses and high operating efficiency
* Low noise design available
* Good resistance to moisture and dust
* Excellent fire-safety characteristics
* Suitable for indoor medium-voltage distribution
* Optional temperature monitoring and protection system
* Optional enclosure for indoor installation
* Suitable for customized voltage, impedance and connection requirements

3. Typical Technical Parameters

| Parameter | Specification |
| ———————– | —————————————————— |
| Product Type | SCB Cast-Resin Dry-Type Transformer |
| Rated Capacity | **200 kVA** |
| Rated Primary Voltage | **10 kV** |
| Rated Secondary Voltage | **0.4 kV / 400 V** |
| Number of Phases | 3 Phase |
| Frequency | **50 Hz** |
| Cooling Method | AN / optional AF |
| Insulation Type | Cast Resin |
| HV Winding | Copper or Aluminum |
| LV Winding | Copper or Aluminum |
| Vector Group | Dyn11, customizable |
| Tap Range | Typically ±2×2.5% or according to project requirements |
| Rated Insulation Level | According to IEC requirements |
| Impedance Voltage | Typically according to customer/project specification |
| Installation | Indoor, or outdoor with suitable enclosure |
| Temperature Monitoring | Optional |
| Enclosure | Optional |
| Applicable Standard | IEC 60076 series / applicable local standards |
| Insulation Class | According to design and applicable standard |
| Ambient Temperature | According to applicable design conditions |
| Altitude | According to project requirements |

Note: Final technical parameters should be confirmed according to the customer’s required standard, grid conditions and project specifications. Losses, impedance voltage, dimensions, weight, noise level, insulation level and temperature-rise values should be stated on the final datasheet and quotation.

4. Typical Applications

The SCB-200kVA dry-type transformer can be used for:

* Industrial factories
* Commercial buildings
* Shopping malls
* Office buildings
* Hospitals
* Schools and universities
* Hotels
* Airports
* Railway and metro projects
* Data centers
* Mining facilities
* Petrochemical facilities
* Renewable-energy projects
* Solar PV and energy-storage projects
* Infrastructure projects
* Medium-voltage distribution networks

For industrial applications, the transformer can be installed between a **10kV medium-voltage supply and a 400V low-voltage distribution system**, supplying downstream switchgear, motor control centers, lighting systems and other electrical loads.

5. Why Choose an SCB Dry-Type Transformer?

For overseas EPC contractors, electrical distributors and industrial users, the SCB-200kVA provides several practical advantages:

**Safety:** Oil-free construction reduces fire and leakage-related concerns.

**Reliability:** Cast-resin insulation provides a robust insulation system for properly designed and maintained installations.

**Maintenance:** No transformer oil treatment or oil-level management is required.

**Flexibility:** Primary voltage, secondary voltage, vector group, tap range, impedance, winding material and enclosure can be customized according to project requirements.

**International Application:** The transformer can be manufactured according to applicable IEC requirements and adapted to local grid specifications.

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# 6. 10 Frequently Asked Questions

FAQ 1: What is the rated capacity of the SCB-200kVA transformer?

The rated capacity is **200kVA**. It is designed for three-phase medium-voltage distribution applications where a 200kVA transformer capacity is required.

FAQ 2: What are the primary and secondary voltages?

The standard configuration described here is **10kV primary voltage and 0.4kV secondary voltage**. Other voltage combinations can be manufactured according to the customer’s grid requirements.

FAQ 3: Is the SCB-200kVA transformer oil-filled?

No. It is a **dry-type cast-resin transformer** and does not use transformer oil as its primary insulation medium.

FAQ 4: What is the difference between an SCB dry-type transformer and an oil-immersed transformer?

The SCB transformer uses cast-resin insulation and air cooling, while an oil-immersed transformer uses insulating oil for insulation and heat dissipation. Dry-type transformers are particularly suitable for locations where fire safety, environmental protection and indoor installation are important.

FAQ 5: What is the standard cooling method?

The standard cooling method is generally **AN (Air Natural)**. **AF (Air Forced)** cooling can be provided when additional short-term or continuous load capacity is required, subject to the manufacturer’s design.

FAQ 6: Can the transformer use copper windings?

Yes. The transformer can be manufactured with **copper windings**. Aluminum winding configurations can also be offered depending on the required technical and economic specifications.

FAQ 7: What is the typical vector group?

**Dyn11** is a common configuration for 10kV/0.4kV distribution transformers. Other vector groups can be considered according to the requirements of the power system.

FAQ 8: Can the transformer be equipped with temperature monitoring?

Yes. An optional **temperature controller and temperature sensors** can be installed to monitor winding temperature and provide alarm or protection functions.

FAQ 9: Can the transformer be supplied with an enclosure?

Yes. A suitable protective enclosure can be provided when required, particularly for installations where protection against accidental contact, dust or other environmental conditions is necessary.

FAQ 10: Which standards can be used for the SCB-200kVA transformer?

The transformer can be designed and tested according to the applicable **IEC 60076 series** and relevant local or project-specific standards. The exact standard, test requirements and certification should be confirmed before production.

7. Recommended Buyer Information for Quotation

When requesting a quotation for an SCB-200kVA dry-type transformer, customers should ideally provide:

1. Rated capacity: **200kVA**
2. HV voltage: **10kV**
3. LV voltage: **0.4kV / 400V**
4. Frequency: **50Hz or 60Hz**
5. Vector group: **Dyn11 or required group**
6. Tap range
7. Winding material: copper or aluminum
8. Impedance voltage
9. No-load and load-loss requirements
10. Installation location and ambient conditions
11. Indoor/outdoor installation
12. Enclosure requirements
13. Required IEC/local standard
14. Temperature monitoring requirements
15. Required quantity and delivery destination

This information allows the manufacturer to prepare a more accurate **technical datasheet, quotation, loss calculation, dimensions, weight and delivery proposal**.