Dry Type Transformers Cast Resin

400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer
400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer
400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer
400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer
400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer
400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer
400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer
400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer
400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer
400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer

400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer

The TLS 400-15/20-0.4kV dry-type transformer is a dual high-voltage distribution transformer, specially designed for countries and regions where different grid voltages such as 15kV and 20kV are used in different areas.
By tap changing, the high-voltage side can be easily switched between 20kV and 15kV, allowing one transformer to adapt to various voltage conditions and helping reduce equipment replacement and system modification costs.

With copper windings, the transformer offers good electrical performance and thermal stability.
It is suitable for industrial and public power distribution systems that require high reliability, safety, and operational flexibility.


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Basic Info.


Primary Voltage

20kV, 15kV

Secondary Voltage400 V
Vector GroupDyn5
Impedance4%
Capacity (Power Rating)400kVA
H.V. Tap Range±2 × 2.5% or others
BIL (Basic Insulation Level)95 kV
StandardsIEC, IEEE, ANSI, DOE
CertificatesCE, SGS, CNAS
UsageRectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer


Features of Dual-Voltage Dry-Type Transformer (15kV / 20kV)

1. Dual-voltage design (15kV / 20kV switchable)
Designed for regions with different grid voltages. One transformer can be used for both 15kV and 20kV systems, reducing replacement and retrofit costs.

2. Fireproof and environmentally friendly
Oil-free dry-type design, safe for installation in load centers and indoor applications.

3. Reliable and durable structure
High mechanical strength, strong short-circuit resistance, low partial discharge, and long service life.

4. Low loss, low noise, and energy-saving
Optimized design ensures quiet operation, high efficiency, and maintenance-free performance.

5. Good overload capability
Output capacity can be increased when forced air cooling is applied.

6. Stable operation in harsh environments
Reliable performance even in humid or demanding conditions.

7. Smart temperature monitoring and protection
Intelligent unit for winding temperature display, fan control, alarm, and trip protection.

8. Compact design and easy installation
Small footprint, easy installation, and lower overall installation cost.


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01 Production Equipments for dry type transformers

1000kVA Dry type Transformer

02 dry type transformer production process

400kVA 20/15-0.4kV Dual-Voltage Dry Type Transformer

03 Resin artcract

1000kva Dry type Transformer

04 Ex-factory test of dry transformers

1000kva Dry type Transformer

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Application scenarios

Distribution power system

Industrial Facilities

Commercial buildings, high complexes, airports

Package and Shipping

1000kva Dry type Transformer

WHY CHOOSE US?

Quality Control: Our quality control system is comprehensive and multi-faceted. From the initial selection of high-grade raw materials sourced from reliable suppliers, we ensure that every component used in our products meets the highest quality standards.


Routine Tests:

Measurement of winding resistance

Measurement of voltage ratio

Check of vector group

Mesurement of impendance voltage and load loss

Measurement of no load oss and current

Separate-source voltage withstand test

Induced overvoltage withstand test

Dimension checking


Type Tests

Lighting impulse test

Temperature rise test

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