SCB11/SCB13/SCB14/SCB18 Series Epoxy Resin Cast Dry Type Full Copper Power Transformer

The SCB11/SCB13/SCB14/SCB18 Series Dry Type Transformer is a three-phase epoxy-resin-cast dry-type** power transformer** designed for safe, reliable, and energy-efficient indoor power distribution. The transformer features copper foil low-voltage windings, vacuum-cast epoxy resin high-voltage windings, and 100% copper conductors throughout the transformer.

The 500kVA configuration is widely used in commercial buildings, data centers, industrial parks, hospitals, rail transit systems, office buildings, municipal projects, and industrial facilities.

Unlike oil-immersed transformers, the epoxy resin cast construction eliminates the need for insulating oil, significantly reducing the risks associated with oil leakage and fire. The transformer provides excellent insulation, moisture resistance, low maintenance requirements, and reliable operation in demanding indoor environments.

The SCB series is available in different energy-efficiency levels, including SCB11, SCB13, SCB14, and SCB18, allowing customers to select the appropriate balance between initial investment and long-term energy savings.

Model Designation

A typical model designation is:

SCB□-500/10-0.4

The standard high-voltage tap range can be ±5% or ±2 × 2.5%, depending on the project requirements. Standard vector groups include Yyn0 and Dyn11, while short-circuit impedance options such as 4% and 6% can be provided according to system requirements.

Standard voltage combinations include 10kV/0.4kV, with 6kV and 10.5kV high-voltage configurations available for customized applications.

Key Technical Specifications

Final electrical parameters can be customized according to the project specification, applicable standards, and local grid requirements.

1. High-Quality Silicon Steel Core

The transformer uses high-grade cold-rolled grain-oriented silicon steel assembled with precision stacking technology.

The core is treated with a protective resin coating to improve resistance to moisture and corrosion. Optimized magnetic circuit design helps reduce no-load losses, excitation current, and operating noise, improving the transformer's overall energy efficiency.

The low-loss core is particularly suitable for facilities where the transformer operates continuously, such as data centers, hospitals, commercial buildings, and manufacturing plants.

2. 100% Copper Windings

High-Voltage Winding

The high-voltage winding uses high-purity copper conductors and a full-winding structure. Glass-fiber insulation is combined with vacuum epoxy resin casting to create a mechanically strong and electrically reliable insulation system.

Internal axial cooling ducts are incorporated into the winding structure to improve heat dissipation and maintain stable operating temperatures.

Low-Voltage Winding

The low-voltage winding adopts a copper foil winding structure. Compared with conventional wire windings, the foil design provides more uniform current distribution and strong resistance to electromagnetic forces generated during short-circuit conditions.

It also helps reduce local electric field concentration and partial discharge.

Full-Copper Construction

The entire transformer uses copper conductors for both high- and low-voltage windings.

There is no aluminum-clad or aluminum winding configuration. The full-copper design provides stable thermal performance, excellent electrical conductivity, strong short-circuit withstand capability, and long service life.

3. Epoxy Resin Cast Insulation

The windings are encapsulated using epoxy resin vacuum casting technology, forming a solid and mechanically stable insulation structure.

The epoxy resin cast body provides:

• Excellent electrical insulation

• High mechanical strength

• Moisture and dust resistance

• Good thermal stability

• Reduced risk of insulation deterioration

• No insulating oil leakage

• Improved fire safety

• Low maintenance requirements

This construction makes the transformer particularly suitable for indoor installations and locations with high safety requirements.

4. Standardized Terminals and Easy Installation

The transformer is equipped with precision-manufactured terminals and clearly marked phase connections.

Standardized terminal design makes field wiring, inspection, commissioning, and maintenance easier while helping reduce installation errors.

Cooling System: AN / AF

The transformer supports two cooling modes.

AN – Natural Air Cooling

Under natural air cooling, the transformer operates at its rated capacity without forced ventilation.

AN cooling provides:

• Quiet operation

• Lower auxiliary power consumption

• Reduced maintenance requirements

• Suitable performance for normal continuous loads

AF – Forced Air Cooling

When the cooling fans are activated, forced-air cooling increases heat dissipation capacity and can provide approximately 40%–50% additional short-term output capacity, depending on the actual transformer design and operating conditions.

AF cooling is suitable for applications with:

• Short-term overloads

• Seasonal load peaks

• Variable industrial loads

• Data center load fluctuations

• Commercial building peak demand

Intelligent Temperature Monitoring System

An intelligent temperature controller can be supplied as an optional accessory.

The system can continuously monitor the temperature of the three-phase windings and provide multiple protection functions, including:

• Real-time winding temperature display

• Automatic cooling fan control

• Over-temperature alarm

• High-temperature trip protection

• Communication interface

• Remote monitoring through an upper-level control system

This configuration is especially useful for data centers, industrial plants, hospitals, and other critical power distribution facilities.

Enclosure Options

The basic transformer configuration is IP00, which is suitable for standard indoor electrical rooms where appropriate electrical safety clearances and access controls are provided.

A metal enclosure can be added when additional protection is required.

Available enclosure options include:

• IP00 – Open type

• IP20 – Protection against solid foreign objects and accidental contact

• IP23 – Enhanced enclosure protection for applicable installation environments

The enclosure configuration can be selected according to installation conditions and project safety requirements.

SCB11 vs. SCB13 vs. SCB14 vs. SCB18

The SCB series covers different energy-efficiency levels to meet different project requirements.

• SCB11 – Mature and economical configuration suitable for general power distribution applications.

• SCB13 – Higher energy efficiency with reduced no-load losses, suitable for projects emphasizing long-term operating costs.

• SCB14 – Higher-efficiency configuration suitable for energy-saving distribution projects and applications with strict efficiency requirements.

• SCB18 – Ultra-high-efficiency configuration designed for applications where transformers operate continuously and energy losses have a significant impact on total operating costs.

For facilities such as data centers, continuously operating factories, hospitals, and large commercial buildings, selecting a higher-efficiency transformer can help reduce long-term no-load energy consumption.

The exact loss values and efficiency classification should be confirmed against the applicable national or project standard for the specified production year and transformer rating.

Main Advantages

1. Full-Copper Windings

Pure copper high- and low-voltage windings provide excellent conductivity, stable temperature rise, strong short-circuit withstand capability, and long service life.

2. Epoxy Resin Vacuum Casting

Solid epoxy resin insulation eliminates oil leakage risks while providing excellent insulation, moisture resistance, mechanical strength, and fire safety.

3. Multiple Energy-Efficiency Options

SCB11, SCB13, SCB14, and SCB18 configurations allow customers to select the appropriate transformer according to project budget, energy-efficiency requirements, and operating conditions.

4. Low Loss and Low Noise

A high-quality grain-oriented silicon steel core and optimized magnetic circuit design help reduce no-load losses and operating noise.

5. AN/AF Dual Cooling

Natural air cooling supports normal continuous operation, while forced-air cooling provides additional thermal capacity for load peaks and short-term overload conditions.

6. Intelligent Temperature Protection

Optional temperature monitoring, fan control, alarm, trip, and communication functions improve operational safety and simplify transformer management.

7. Low Maintenance

Because there is no insulating oil, the transformer does not require routine oil testing, oil replacement, or oil leakage management associated with oil-immersed transformers.

8. Flexible Configuration

Voltage ratings, tap ranges, vector groups, enclosure protection, cooling systems, temperature monitoring, and other accessories can be customized according to project requirements.

Typical Applications

The 500kVA SCB series dry-type transformer is suitable for a wide range of indoor power distribution applications, including:

• Data centers

• Shopping malls

• Office buildings

• Hospitals

• Schools and universities

• Industrial plants

• Smart manufacturing facilities

• Rail transit facilities

• Residential and commercial developments

• Municipal infrastructure

• Ports and transportation facilities

• Laboratories

• Photovoltaic power distribution systems

• Industrial parks

• Critical power supply systems

Its oil-free construction makes it particularly suitable for high-density buildings and locations where fire safety, environmental protection, and reliable power distribution are important.

Installation and Operating Considerations

For safe and reliable operation, the following conditions should be considered:

1. Install the transformer in a properly ventilated electrical room and provide adequate heat dissipation space.

2. Avoid operating the transformer continuously at full load in an enclosed or poorly ventilated room.

3. Keep terminals clean and periodically check terminal connections to prevent excessive contact resistance and overheating.

4. Ensure that temperature controllers, cooling fans, and other accessories are properly installed and protected from excessive vibration.

5. Electrical connections, commissioning, maintenance, and internal inspections should only be performed by qualified electrical personnel.

6. The actual ambient temperature, altitude, humidity, ventilation, and overload conditions should be confirmed during transformer selection and system design.

Optional Configurations and Value-Added Services

We can provide customized configurations and project support according to customer specifications, including:

• 6kV / 10kV / 10.5kV high-voltage ratings

• Customized low-voltage ratings

• ±5% or ±2 × 2.5% tap range

• Yyn0 / Dyn11 vector groups

• Customized impedance

• Copper or other specified conductor configurations

• IP00 / IP20 / IP23 enclosures

• AN / AF cooling

• Intelligent temperature controller

• Cooling fans

• Over-temperature alarm and trip

• Communication interface

• Surge arrester installation

• Customized nameplates

• Routine test reports

• Type test documentation

• Technical drawings and datasheets

• Tender documentation and project-specific compliance documents

Why Choose a 500kVA Epoxy Resin Cast Dry Type Transformer?

For indoor medium-voltage distribution systems, the 500kVA epoxy resin cast dry type transformer provides a practical combination of electrical performance, fire safety, low maintenance, and long-term reliability.

The full-copper winding construction, epoxy resin vacuum casting, low-loss silicon steel core, optional intelligent temperature monitoring, and multiple energy-efficiency configurations make the SCB11/SCB13/SCB14/SCB18 series suitable for both general commercial distribution and demanding industrial applications.

For projects where the transformer operates continuously, selecting the appropriate high-efficiency configuration can further reduce long-term operating losses and total cost of ownership.

Contact us for a quotation for a 500kVA SCB11, SCB13, SCB14, or SCB18 dry-type transformer, along with the technical datasheet, drawings, test reports, and customized specifications.