SC (B) 14 Epoxy Resin Cast Dry‑Type Distribution Transformer

The SC(B)14 series dry type transformer is a three-phase epoxy resin cast distribution transformer developed for efficient and reliable medium-voltage power distribution.

The series covers rated capacities from 30kVA to 2500kVA and can be configured for primary voltages including 6kV, 6.3kV, 6.6kV, 10kV, 10.5kV and 11kV, with 0.4kV commonly used on the low-voltage side.

High-voltage windings are encapsulated using vacuum epoxy resin casting technology. The solid insulation system helps protect the winding against moisture, dust and contamination while providing stable dielectric and mechanical performance.

The transformer can be equipped with an intelligent temperature monitoring system that monitors three-phase winding temperature and supports automatic fan control, over-temperature alarm and trip signal output.

Natural-air cooling is used during normal operation, while forced-air cooling can be configured according to transformer rating and application requirements.

SC(B)14 transformers are suitable for industrial facilities, commercial buildings, data infrastructure, transportation systems, public facilities and other indoor power-distribution projects.

SUT can configure the transformer according to required capacity, voltage ratio, vector group, impedance, tapping range, winding material, protective enclosure and site conditions.

1. Vacuum-Cast Epoxy Resin Insulation

The high-voltage windings are encapsulated using vacuum epoxy resin casting technology. This insulation structure helps protect the windings from moisture, dust and environmental contamination while providing reliable electrical insulation.

2. Low-Loss Transformer Design

SCB14 transformers use optimized magnetic-core and winding designs to reduce no-load and load losses.

Actual efficiency classification and guaranteed loss values depend on the rated capacity, applicable standard and final transformer specification.

3. Oil-Free Power Distribution

Unlike oil-immersed transformers, the SCB14 uses solid insulation and does not require insulating oil.

This eliminates insulating-oil leakage risk and makes cast-resin dry type transformers particularly suitable for many indoor power-distribution applications where maintenance and fire-safety considerations are important.

4. Strong Short-Circuit Withstand Capability

The winding structure is designed to withstand mechanical and thermal stresses generated during short-circuit conditions.

The actual short-circuit impedance depends on transformer capacity and the specified electrical design.

5. Intelligent Temperature Monitoring

Temperature sensors can continuously monitor three-phase winding temperatures.

The temperature controller can provide:

• Real-time temperature indication
• Automatic cooling fan control
• Over-temperature alarm
• Over-temperature trip output

6. AN / AF Cooling

The transformer can operate using AN — Air Natural cooling under normal operating conditions.

AF — Air Forced cooling can be configured where additional cooling capacity is required.

Permissible temporary loading capability should be determined according to the specific transformer design and operating conditions.

7. Moisture-Resistant Cast Resin Construction

The epoxy resin encapsulated winding structure provides good resistance to humidity and environmental contamination.

This makes the transformer suitable for many demanding indoor industrial and infrastructure environments.

8. Project-Specific Configuration

SUT can configure the SCB14 transformer according to project requirements, including:

• Rated capacity
• HV and LV voltage
• Vector group
• Short-circuit impedance
• Tapping range
• Frequency
• Winding material
• Temperature controller
• Cooling fans
• Protective enclosure
• IP protection level
• Anti-condensation heater
• Other accessories

Typical Voltage Combination

HV: 6 / 6.3 / 6.6 / 10 / 10.5 / 11kV
LV: 0.4kV
Tapping: ±5% or ±2 × 2.5%
Vector Group: Dyn11 / Yyn0

*Different impedance and loss configurations may be available according to rated capacity and project specifications. Final guaranteed data should be confirmed in the approved technical datasheet.

The SC(B)14 model designation describes the basic transformer construction and performance series.

S — Three-phase transformer
C — Epoxy resin cast insulation
B — Low-voltage foil-wound coil configuration
14 — Transformer performance / loss series code

The complete transformer model also includes the rated capacity and voltage class.

For example:

SCB14-1000/10

indicates an SCB14 series dry type transformer with a rated capacity of approximately 1000kVA and a 10kV-class high-voltage side.

Additional parameters such as vector group, secondary voltage, impedance and tapping range must be confirmed separately.

1. High‑efficiency & Energy Saving
   Level 2 high‑efficiency design reduces no‑load & load losses. Low noise and remarkable energy‑saving effect, supports maintenance‑free long‑term running.
2. High Safety Performance
   Epoxy vacuum encapsulated winding structure, fire‑resistant and explosion‑proof. High mechanical strength, outstanding short‑circuit withstand and thermal stability, controlled low partial discharge.
3. Heat Dissipation & Overload Capacity
   Optimized internal air‑duct design ensures good heat dissipation. Forced‑air cooling allows short‑term overload operation. Good moisture resistance adapts to high‑humidity harsh working conditions.
4. Intelligent Temperature Protection
   Built‑in temperature sensor cyclically displays 3‑phase winding temperature. Automatically triggers cooling fans; provides overtemperature alarm and trip signal output for system interlock.
5. Compact & Custom‑Built Solution
   Small footprint and light weight cut civil‑work & installation expenditure. Optional accessories include anti‑condensation heater and special tap‑changer for site‑specific requirements.

Industrial Plants

Suitable for manufacturing facilities, factories and industrial distribution systems requiring reliable medium-voltage-to-low-voltage transformation.

Commercial Buildings

Cast resin dry type transformers are commonly selected for indoor electrical rooms in large commercial and public buildings where oil-free operation and reduced maintenance are important.

Data Infrastructure

Suitable for data infrastructure and critical electrical facilities when the transformer specification matches the required load profile and redundancy design.

Transportation Infrastructure

Applicable to railway, metro, airport and other infrastructure power-distribution projects.

Hospitals and Public Facilities

Can be used in public infrastructure where indoor installation, low maintenance and oil-free insulation are important project considerations.

Renewable Energy Facilities

SCB14 transformers can also be configured for auxiliary and distribution power systems associated with renewable energy projects.

Mining and Industrial Infrastructure

Project-specific configurations can be supplied for industrial and mining applications according to environmental and electrical requirements.

SUT provides project-specific SCB14 transformer configurations rather than limiting customers to one standard design.

Available Engineering Options

Rated Capacity
30–2500kVA

Primary Voltage
6–11kV typical range

Secondary Voltage
0.4kV standard configuration; project-specific designs can be evaluated

Vector Group
Dyn11 / Yyn0 and project-specific options

Impedance
According to capacity and project specification

Tapping Range
±5% / ±2 × 2.5% or project-specific configuration

Frequency
50Hz / 60Hz

Cooling
AN / AF

Temperature Monitoring
Controller, fan control, alarm and trip outputs

Protective Enclosure
Available according to installation requirements

Anti-Condensation Heating
Available for selected project conditions

Special Environmental Design
Can be evaluated according to altitude, humidity, ambient temperature and site conditions

Have an electrical specification or single-line diagram?

Send it to the SUT engineering team for technical review.

What is an SCB14 dry type transformer?

An SCB14 transformer is a three-phase epoxy resin cast dry type distribution transformer designed for medium-voltage power distribution. It uses solid insulation instead of transformer oil and is commonly used for indoor industrial, commercial and infrastructure applications.

What capacities are available for SCB14 transformers?

The SUT SCB14 series typically covers rated capacities from 30kVA to 2500kVA.

What primary voltages are available?

Typical high-voltage options include 6kV, 6.3kV, 6.6kV, 10kV, 10.5kV and 11kV.

What is the standard secondary voltage?

A typical secondary voltage is 0.4kV for low-voltage distribution applications. Other configurations should be confirmed according to project requirements.

What vector groups are available?

Typical configurations include Dyn11 and Yyn0. Other vector groups may be evaluated according to the electrical system.

What is the short-circuit impedance of an SCB14 transformer?

Typical impedance depends on transformer capacity and design. Lower-capacity models commonly use approximately 4%, while larger capacities commonly use approximately 6%. Other configurations may be available according to project requirements.

Is SCB14 an oil-free transformer?

Yes. SCB14 is an epoxy resin cast dry type transformer and does not use insulating oil as its primary insulation and cooling medium.

Can SCB14 transformers use forced-air cooling?

Yes. Forced-air cooling can be configured in addition to natural-air cooling. Permissible loading conditions depend on transformer design, ambient temperature and operating requirements.

Can SCB14 transformers be customized?

Yes. Capacity, voltage ratio, vector group, impedance, tapping range, frequency, winding configuration, cooling system, enclosure and accessories can be configured according to project requirements.

Is SCB14 suitable for indoor installation?

Yes. Cast resin dry type transformers are widely used for indoor distribution systems. The final enclosure, ventilation, clearance and fire-safety design must follow the applicable project requirements and local standards.

What information is required for an SCB14 transformer quotation?

Please provide:

• Rated capacity
• Primary voltage
• Secondary voltage
• Frequency
• Vector group
• Tapping range
• Required impedance
• Installation altitude
• Ambient temperature
• Enclosure requirement
• Applicable standard

A transformer specification sheet or single-line diagram can also be submitted for technical review.