Medium voltage dry-type transformer

Dry-type medium-voltage transformers are essential in electrical power management, facilitating necessary voltage adjustments in electrical systems. They are responsible for transforming voltage from medium to low.

Technical Specifications

Construction method: Dry application with high-quality epoxy resin.

Voltage class: 15kV¹

Standard connection: primary delta and secondary star with accessible neutral;

Thermal class of insulating materials: F (155 °C)

Conductor material: Aluminum

Protection rating: IP00²

Cooling Mode: AN (natural)

Maximum ambient temperature: 40 °C

Altitude máxima: 1000 m.s.n.m

Average temperature rise of the windings: 100 °C

Standards: ABNT NBR 5356:11

Accessories: Casters for movement, lifting eyes, grounding connection terminals, temperature control relays.

Voltage class: 24.2 and 36.2kV upon request

Protection rating: IP23 or IP54 upon request.

* Other technical product specifications are available upon request.


Optional:

  • Electrostatic Shielding
  • Forced Ventilation
  • Temperature controller with Modbus communication.
  • Thermal Class H insulation (180ºC)
  • Buchas Plug-in
  • Thermographic Inspection Windows
  • Other optional extras available upon request.



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PROTECTION LEVEL

Transformers in the 15kV, 24.2kV and 36.2kV classes, with or without protective enclosures for adapting to mains voltage. Provides greater safety and reliability in voltage adaptation for installations in areas with pedestrian traffic. Can be used to power industrial electrical panels, hospitals, airports, commercial buildings, shopping centers, schools, data centers, wind farms, solar installations, entertainment centers, and more.

IP21

It offers protection against solid objects with a diameter greater than 12.5 mm and against vertically falling water droplets. Although it is basic protection, it is suitable for indoor environments where exposure to liquids and dust is minimal.
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IP23

It offers resistance against solid objects with a diameter greater than 12.5 mm and protects against water droplets falling at an angle of up to 60 degrees. This rating is ideal for environments where there is a possibility of moderate exposure to water and dust.
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IP54

It provides a superior level of protection, blocking dust ingress and offering protection against water jets from all directions. This rating is extremely useful in harsh industrial environments where dust and humidity are constant, or even for outdoor installation.
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Increase your transformer's capacity with forced ventilation:

The possibility of increasing power by up to 25% through fans that increase airflow inside the coils. This improvement in heat dissipation reduces the operating temperature, improving the performance of your transformer and enabling it to operate at a higher load than originally designed, without reducing its lifespan.

Adapt your project with the K-factor:

For operation connected to non-linear loads, a compensating factor is designated in the design, which prepares the transformer for operation without compromising its integrity and efficiency. When defining the characteristics of a transformer for applications where electronic devices are present, it is essential to consider harmonic spectrum analysis to define the K-factor to ensure a safe and reliable electrical system. At Kraper you will find specific transformers for applications such as inverters, data centers, telecommunications, industrial furnaces, among others.

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