630KVA 6KV Oil Immersed Transformer

GUANGBIAN as a China power transformer supplier, has developed this 630KVA 6KV Oil Immersed Transformer based on the TM series oil-immersed transformers in Turkmenistan, with improvements made for full replacement. It once provided efficient and energy-saving power supply for natural gas production facilities in Turkmenistan.

What is a 630KVA 6KV Oil Immersed Transformer?

A 630KVA 6KV Oil Immersed Transformer is a medium-voltage distribution transformer that uses insulating mineral oil for cooling and insulation.

It converts 6KV primary voltage into low-voltage output such as 400V, 415V, 433V, or customized voltages for industrial and commercial electricity consumption.

The insulating oil not only improves heat dissipation efficiency but also enhances insulation strength, helping the transformer maintain stable performance under long-term heavy-load operation.

Core Structure Of The Transformer

Transformer Core

The transformer core is manufactured using high-quality CRGO silicon steel sheets with step-lap construction to minimize magnetic flux leakage and reduce energy loss.

Transformer Windings

The windings use oxygen-free copper conductors with multi-layer insulation treatment to improve electrical conductivity and withstand short-circuit impacts.

Oil Tank

The corrugated oil tank improves heat dissipation performance while compensating for oil expansion and contraction caused by temperature changes.

Insulation Oil

Premium transformer oil provides both insulation and cooling functions, helping maintain safe and stable operation.

Technical Document

Operating Environment

Temperature Conditions:

Long-term Operating Ambient Temperature: -25℃ ~ +40℃.

Maximum Operating Ambient Temperature: Not exceeding +50℃.

Storage and Transportation Temperature:

 -40℃ ~ +60℃.

Humidity Conditions:

Relative Humidity: ≤95% at 25℃

Altitude Requirements:

Rated Altitude Adaptation Range: ≤1000 meters

Manufacturing Process

The 630KVA 6KV Oil Immersed Transformer undergoes strict quality control procedures:

● Silicon steel core cutting

● Coil winding production

● Vacuum drying treatment

● Core assembly

● Vacuum oil filling

● Electrical testing

● Factory inspection

● Packaging and shipment

Each transformer is tested before delivery to ensure reliable operation and compliance with international standards.

Our Factory

Sheet metal workshop

Foil winding workshop

Winding workshop

Winding oven workshop

Transformer assembly workshop

Transformer commissioning workshop

Maintenance Tips

To extend transformer service life, regular maintenance is recommended:

Check oil level regularly

Monitor operating temperature

Test insulation resistance periodically

Inspect bushings and terminals

Replace aging transformer oil when necessary

Clean dust and external contaminants

Proper maintenance can significantly improve transformer reliability and reduce downtime.

Why Choose Oil Immersed Transformer?

FAQ

1. What is the main application of a 630KVA 6KV Oil Immersed Transformer?

This transformer is widely used in 6KV medium-voltage distribution systems to step down voltage to 400V/415V/433V for industrial plants, commercial buildings, mining operations, substations, and infrastructure projects.

2. What load capacity can a 630KVA transformer support?

A 630KVA transformer typically supports around 500KW of load (based on a power factor of 0.8). It is suitable for medium-sized factories, production workshops, and regional power distribution systems.

3. Can the transformer operate at full load continuously?

It can operate at full load, but continuous 100% loading is not recommended. The optimal operating range is 70%–85% load to ensure longer service life and lower thermal stress.

4.Can the transformer handle overload conditions?

It can tolerate short-term overloads, but long-term overload operation is not recommended, as it may reduce insulation life and increase temperature rise.

5.Is it suitable for renewable energy projects?

Yes. It is widely used in:

● Solar power plants

● Wind energy systems

● Energy storage systems (BESS)

● Grid integration applications

6.Why are oil immersed transformers widely used in industrial systems?

Because they offer:

● Better heat dissipation

● Higher overload capacity

● Lower initial cost

● Longer operational life

 making them ideal for continuous industrial power distribution systems.