300 kVA Dry Type Transformer 11 kV to 400 V Three Phase for Industrial Power Distribution

Overview of the 300 kVA Dry Type Transformer

The 300 kVA Dry Type Transformer is a critical component in modern industrial power distribution systems, designed to provide safe, stable, and efficient voltage transformation from medium voltage (11 kV) to low voltage (400 V). As industrial facilities worldwide demand higher safety standards, lower maintenance costs, and environmentally responsible solutions, the 300 kVA dry type transformer has become a preferred choice over traditional oil-filled transformers.

This 300 kVA dry type transformer 11 kV to 400 V three phase configuration is widely adopted in manufacturing plants, industrial parks, commercial buildings, infrastructure projects, and utility distribution networks. Its oil-free construction, reliable insulation system, and robust electrical performance make it suitable for both indoor and semi-enclosed installations across diverse climates and regulatory environments.

Designed for global markets, the 300 kVA dry type transformer supports international voltage standards, frequencies, and certifications, making it ideal for projects in North America, Europe, the Middle East, Latin America, Africa, and Asia-Pacific regions.

What Is a 300 kVA Dry Type Transformer?

A 300 kVA dry type transformer is a three-phase power transformer that uses air and solid insulation materials instead of mineral oil for cooling and electrical insulation. The “300 kVA” rating indicates its apparent power capacity, which is well-suited for medium-sized industrial electrical loads and distribution systems.

Unlike oil-immersed transformers, a dry type transformer eliminates the risks associated with oil leakage, fire hazards, and environmental contamination. This makes the 300 kVA dry type transformer for industrial power distribution especially suitable for indoor applications, high-density industrial zones, and areas with strict fire safety regulations.

Key defining characteristics include:

• Three phase electrical design

• Medium voltage primary (11 kV typical)

• Low voltage secondary (400 V typical)

• Dry insulation system (cast resin or VPI)

Working Principle of the 11 kV to 400 V Dry Type Transformer

The 300 kVA dry type transformer 11 kV to 400 V operates based on the principle of electromagnetic induction.

1. High Voltage Input (11 kV)
   Electrical energy enters the transformer through the high-voltage winding connected to the medium-voltage distribution network.

2. Magnetic Flux Creation
   The alternating current in the high-voltage winding generates a magnetic field in the laminated silicon steel core.

3. Voltage Transformation
   The magnetic flux induces a proportional voltage in the low-voltage winding, stepping the voltage down from 11 kV to 400 V according to the turns ratio.

4. Three Phase Low Voltage Output (400 V)
   The transformer delivers stable three-phase power suitable for industrial equipment, motors, control panels, and distribution boards.

Throughout this process, the 300 kVA dry type transformer maintains high efficiency, low losses, and stable voltage regulation under varying load conditions.