S11 630KVA 11kv Three Phase Oil Immersed Transformer

As a professional transformer manufacturer, GNEE Electric specializes in producing high-quality distribution transformers for global power systems. Our S11 630kVA 11kV Three Phase Oil Immersed Transformer is designed for stable power distribution, high efficiency, and long service life in industrial and utility applications.

 

With advanced manufacturing equipment, strict quality control, and experienced engineering teams, GNEE has supplied transformers to customers across the Middle East, Africa, Southeast Asia, and South America. Our factory focuses on reliable transformer solutions for power plants, factories, mining projects, and grid infrastructure.

 

The S11 630kVA 11kV Three Phase Oil Immersed Transformer features low energy loss, strong overload capacity, and excellent heat dissipation. It is widely used in distribution networks requiring dependable and efficient power supply.

 

We provide full customization services including voltage configuration, tap changer options, copper or aluminum windings, and special project requirements.

 

Factory workshop with assembled transformers ready for testing

 

 

The S11 630kVA 11kV Three Phase Oil Immersed Transformer is engineered to provide stable performance in medium-voltage distribution systems. Its oil-immersed design ensures excellent insulation and cooling performance, making it suitable for continuous operation in demanding environments.

 

High Energy Efficiency Design

The transformer adopts high-grade silicon steel laminated cores, which significantly reduce no-load losses and improve overall energy efficiency. This helps reduce operating costs for long-term power distribution projects.

 

Reliable Copper Winding Structure

The windings are made of high conductivity copper, providing strong short-circuit resistance and improved thermal performance. This ensures stable operation even under fluctuating load conditions.

 

Efficient Oil Cooling System

The oil-immersed structure combined with radiators enables efficient heat dissipation. The transformer maintains stable temperature levels even during heavy load operations.

 

Transformer radiator structure close-up

 

 

The S11 630kVA 11kV Three Phase Oil Immersed Transformer is widely used in medium-voltage power distribution systems. Its robust design allows it to operate reliably in industrial and infrastructure projects.

 

Typical applications include:

• Urban power distribution networks
• Industrial manufacturing plants
• Mining and metallurgy projects
• Commercial building power systems
• Renewable energy substations
• Rural electrification projects

 

Because of its stable performance and long lifespan, the S11 630kVA 11kV Three Phase Oil Immersed Transformer is often selected by utilities and EPC contractors for grid upgrade projects.

 

Transformer being loaded into container for overseas shipment

 

 

Below are typical technical parameters of the S11 630kVA 11kV Three Phase Oil Immersed Transformer. Custom specifications can be provided according to project requirements.

 

Parameter	Specification
Rated Capacity	630 kVA
High Voltage	11 kV
Low Voltage	0.4 kV
Phase	Three Phase
Frequency	50Hz / 60Hz
Cooling Method	ONAN
Vector Group	Dyn11
Impedance	4% – 6%
No-load Loss	≤ 980 W
Load Loss	≤ 7600 W
Winding Material	Copper / Aluminum
Insulation Class	A
Oil Type	Mineral Transformer Oil
Tap Changer	±2×2.5% or ±5%
Standard	IEC 60076 / ANSI / GB

 

At GNEE Electric, every S11 630kVA 11kV Three Phase Oil Immersed Transformer undergoes a strict manufacturing process to ensure high reliability and consistent performance.

 

Core Assembly

The silicon steel core is precisely laminated to minimize magnetic loss and reduce noise levels.

 

Winding Production

High-precision winding machines ensure accurate coil arrangement and excellent electrical performance.

 

Vacuum Oil Filling

Vacuum drying and oil filling technology improve insulation performance and extend transformer service life.

 

Final Assembly and Inspection

Each transformer is carefully assembled and inspected before testing.

 

Transformer coil winding process inside factory workshop

 

 

Before delivery, every S11 630kVA 11kV Three Phase Oil Immersed Transformer must pass strict factory testing procedures.

 

Routine tests include:

• Transformer ratio test
• Winding resistance test
• No-load loss test
• Load loss test
• Insulation resistance test
• Power frequency withstand voltage test
• Temperature rise test

These tests ensure that each transformer meets international standards such as IEC 60076.

 

 

To guarantee safe international transportation, the S11 630kVA 11kV Three Phase Oil Immersed Transformer is packed using reinforced protection methods.

 

Packaging methods include:

• Moisture-proof wrapping
• Heavy-duty wooden cases
• Secure container loading

This ensures the transformer arrives safely even after long-distance sea transportation.

 

 

GNEE Electric has years of experience manufacturing power transformers for global customers.

 

Key advantages include:

• Professional transformer manufacturing factory
• Advanced production equipment
• Strict quality inspection procedures
• International export experience
• Custom engineering support

Our transformers are widely exported to Africa, the Middle East, and Southeast Asia, serving power distribution projects in various industries.

 

 

The S11 630kVA 11kV Three Phase Oil Immersed Transformer is a reliable and energy-efficient solution for medium-voltage power distribution systems. With advanced manufacturing technology, strict quality control, and global project experience, GNEE Electric provides dependable transformer solutions for industrial and utility applications.

Request A Quote

 

If you are looking for a trusted manufacturer of S11 630kVA 11kV Three Phase Oil Immersed Transformer, contact GNEE today to get a competitive quote and expert technical support for your project.

 

👉 Send your inquiry now and receive a fast response from our engineering team.

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