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Dry Type Transformers

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MOQ : 100 Sets

Dry Type Transformers Specification

Rated Voltage
Up to 33 kV

Operating Temperature
-5C to +40C

Load Loss
As per IEC/IS standard values for respective rating

High Voltage
3.3 kV - 33 kV

Cooling Type
AN (Air Natural), AF (Air Forced)

Low Voltage
0.4 kV - 11 kV

Coil Material
Copper/Aluminum

Capacity
25 kVA to 2500 kVA

Dimension (L*W*H)
Depends on rating (example: 1800 mm x 900 mm x 1700 mm for 1000 kVA)

Standard
IS 11171 / IEC 60076

Voltage Booster Type
Tap changer (on load/off load)

Product Type
Dry Type Transformer

Material
Copper/Aluminum windings with epoxy resin insulation

Output
Customizable per application

Frequency (MHz)
50 Hz

Efficiency
97%-99%

Phase
Three Phase

Usage
Industrial and commercial electrical distribution

Coil Structure
Toroidal

Coil Number
Double Winding

Power Scope
25 kVA - 2500 kVA

Weight
Ranges from 300 kg to 4000 kg depending on rating

Protection Class
IP23/IP31

Winding Connection
Dyn11 or Yyn0, as specified

Short Circuit Withstand
Designed as per IEC/IS requirements

Mounting Type
Floor Mounted

Insulating Material
Class F or Class H resin encapsulation

Color/Finish
Epoxy powder-coated enclosure

Noise Level
Below 60 dB at 1 meter distance

Impedance Voltage
4% to 6% (as per transformer rating)

Altitude
Suitable for up to 1000 m above sea level

Humidity Tolerance
Up to 95% (non-condensing)

Thermal Class
Class F (155C) / Class H (180C)

Overload Capacity
10% overload for 1 hour per 24 hours

About Dry Type Transformers

We are one of the affluent manufacturers, exporters and suppliers of a wide assortment of Dry Type Transformers. Provided transformers are manufactured using supreme grade components under the guidance of skilled team of professionals. In order to ensure their excellent functionality and performance, these transformers are stringently tested on various defined parameters. Offered transformers are available in various specifications and are widely used for changing voltages from one level to another. These Dry Type Transformers can be availed from us at reasonable prices.

Key Features:

Robust construction
Hassle-free functionality
High performance
Less Maintenance

Exceptional Insulation and Safety

With Class F (155C) or Class H (180C) resin encapsulation, our dry type transformers are engineered for high-temperature stability and long-lasting performance. The epoxy encapsulation not only enhances insulation but also safeguards the windings against moisture, dust, and environmental contaminants. This robust design ensures reliable operation in demanding industrial and commercial settings, minimizing the risk of short circuits and extending equipment lifespan.

Precision Engineering for Reliable Power

We manufacture transformers with a focus on efficiency (97%-99%), low noise (under 60 dB at 1 meter), and strict compliance with IEC/IS standards. The impedance voltage (4%-6%) and short circuit withstand capabilities ensure your operations remain safe and uninterrupted. With flexible winding connections (Dyn11 or Yyn0) and advanced tap changers, these units can be customized for a wide range of voltage and capacity requirements.

Durable and Customizable for Diverse Applications

Our transformers are designed to suit diverse deployment needs, including floor-mounted installation and customizable outputs. The epoxy powder-coated enclosures and robust copper or aluminum windings (with toroidal/double winding coil structure) assure corrosion resistance and durability. Compliance with IP23 or IP31 protection class, along with support for 50 Hz frequency and efficient cooling methods (AN/AF), make these transformers ideal for challenging conditions up to 1000 meters altitude and 95% humidity.

FAQ's of Dry Type Transformers:

Q: How does resin encapsulation in Class F or Class H dry type transformers enhance safety?

A: Resin encapsulation creates a robust insulation barrier around the transformer windings, providing enhanced protection against moisture, dust, and chemical contaminants. Class F and Class H insulation materials are designed to operate at higher temperatures (up to 155C and 180C respectively), reducing the risk of electrical faults and extending the operational life of the transformer.

Q: What is the standard process for installing these dry type transformers?

A: Installation involves floor mounting the transformer at the designated site, ensuring adequate ventilation for cooling (air natural or air forced), connecting input and output terminals according to the specified winding connection (Dyn11 or Yyn0), and completing all electrical checks. The epoxy powder-coated enclosure facilitates easy handling and increased safety during the process.

Q: Where can these transformers be used most effectively?

A: These dry type transformers are ideal for industrial and commercial electrical distribution where high efficiency, low maintenance, and safety are critical. Their design supports reliable operation in environments with high humidity (up to 95%, non-condensing), moderate altitude (up to 1000 meters), and variable load requirements spanning 25 kVA to 2500 kVA.

Q: What are the benefits of the IP23/IP31 protection class on these transformers?

A: The IP23/IP31 protection ensures the transformer is safeguarded against solid objects larger than 12.5 mm and limited water ingress, making them suitable for indoor or sheltered outdoor environments. This protection increases equipment reliability and reduces the risk of environmental damage or maintenance interruptions.

Q: How is noise level controlled in these transformers?

A: Our transformers are engineered to operate below 60 dB at a one-meter distance. This is achieved through optimized core and coil design, resin encapsulation, and precision manufacturing, making them ideal for installations where low operational noise is crucial, such as commercial spaces or urban industrial sites.

Q: What maintenance is required for dry type resin-encapsulated transformers?

A: Dry type transformers require minimal maintenance compared to oil-immersed units. Periodic inspections should focus on ventilation channels, dust accumulation, terminal connections, and overall enclosure integrity. The absence of oil eliminates leakage risks and environmental hazards, leading to safer and easier upkeep.

Q: When is overload operation permissible, and what limits apply?

A: A 10% overload is permissible for one hour within a 24-hour period, as per design standards. Continuous or frequent overloads should be avoided to prevent excessive thermal stress on insulation materials, ensuring the transformer's longevity and stable performance.

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