500KVA 10KV Oil Immersed Transformer

This 500KVA 10KV Oil Immersed Transformer, manufactured with the GUANGBIAN series design, is widely used in vast residential areas. It can provide stable power for hundreds of households and maintain efficient power output. Our core structure can significantly reduce the noise during the transformer's operation. Even residents living near the transformer will not be affected.

In addition, 500KVA 10KV Oil Immersed Transformer superior core structure and high-quality core material , as well as excellent no-load loss and load loss performance , enable the 500KVA Transformer to save a lot of electrical energy costs over a long period of operation, indirectly reducing the local electricity consumption costs. Moreover, our fully sealed design can effectively adapt to some environments with high levels of sand, dust and other particulates.

Key Advantages

1. High Reliability for Continuous Operation

Designed for 24/7 continuous power distribution

Strong overload tolerance under short-term peak loads

Stable performance in harsh environments (heat, dust, humidity)

2. Excellent Cooling Performance

Transformer oil provides efficient heat dissipation

Natural oil circulation (ONAN cooling) ensures temperature stability

Prevents overheating of windings under heavy load

3. Long Service Life

Sealed tank design reduces oxygen and moisture intrusion

Slows down insulation aging

Typical lifespan: 20–30 years with proper maintenance

4. High Energy Efficiency

Low no-load and load losses (especially S11/S13 series)

Efficiency typically reaches 98%–99% range

Reduces long-term electricity operating costs

5. Strong Short-Circuit Resistance

Reinforced winding structure

High mechanical strength under fault conditions

Suitable for unstable grid environments

6. Low Maintenance Cost

Fully sealed or conservator-type design

Minimal routine maintenance compared to dry-type transformers

Technical Document 

Operating Environment

Temperature Conditions:

Long-term Operating Ambient Temperature: -25℃ ~ +45℃.

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

Industry Comparison (500KVA 10KV Transformer)

Oil Immersed vs Dry-Type Transformer

For a 500KVA 10KV industrial or outdoor distribution system, oil immersed transformers are generally more cost-effective and robust.

Comparison with Other Capacities

Our Factory

Sheet metal workshop

Foil winding workshop

Winding workshop

Winding oven workshop

Transformer assembly workshop

Transformer commissioning workshop

FAQ

Q1: What is the load capacity of a 500KVA 10KV Oil Immersed Transformer?

A 500KVA transformer typically supports around 400–450KW load, depending on power factor (0.8–0.9).

Q2: Why choose oil immersed instead of dry-type?

Oil immersed transformers offer:

● Higher overload capability

● Better cooling performance

● Lower cost for medium/high capacity systems

● Longer operational life in outdoor environments

Q3: Is it suitable for outdoor installation?

Yes. Oil immersed transformers are specifically designed for:

● Outdoor substations

● Industrial yards

● Rural and utility grids

Q4: What maintenance is required?

● Periodic oil testing (dielectric strength, moisture content)

● Bushing inspection

● Temperature monitoring

● Leak and sealing checks

Q5: What are common failure causes?

● Overloading beyond rated capacity

● Oil degradation or leakage

● Poor grounding or lightning surges

● Insulation aging over time