35KV Class Three Phase oil-lmmersed Distribution Transformer

Distribution transformers are one of the important equipment in the power supply and distribution systems of industrial and mining enterprises and civil buildings. Since oil-immersed transformers have the characteristics of excellent performance and low price, the vast majority of power transformers use transformer oil as insulation and cooling medium.

Characteristics of oil-immersed transformer

1) Used in conjunction with fiber materials, it has good insulation performance, can reduce the insulation distance and reduce costs.

2) Transformer oil has low viscosity and good heat transfer performance.

3) It can well protect the core and windings from the influence of moisture in the air.

4) Protect insulating paper and insulating cardboard from the effects of oxygen, reduce the aging of insulating materials, and extend the life of the transformer.

At present, except for some special-purpose small and medium-capacity transformers and gas transformers, the vast majority of large and medium-sized transformers still use transformer oil as a cooling and insulating medium.

The insulation heat resistance grade of a transformer impregnated with transformer oil is Class A, and the long-term operating temperature is 105°C.

Applicable places for oil-immersed transformers

1. Non-enclosed oil-immersed transformers: mainly include S8, S9, S10 and other series products, which are widely used in industrial and mining enterprises, agriculture and civil buildings.
2. Closed oil-immersed transformers: mainly include S9, S9-M, S10-M and other series of products, which are mostly used in places with a lot of oil pollution and chemical substances in the petroleum and chemical industries.
3. Sealed oil-immersed transformers: mainly include BS9, S9-, S10-, S11-MR, SH, SH12-M and other series products, which can be used for power distribution in various places such as industrial and mining enterprises, agriculture, and civil buildings.

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Maintenance and safety precautions for oil-immersed transformers

There are maintenance and safety considerations for oil-filled transformers. Keeping your transformer well maintained can extend its service life and reduce the risk of safety issues.

You should perform regular visual inspections and cleanings. Inspect the transformer to ensure that all components are in good condition and there is no threat of leakage. Make sure all fittings are tight. Clean the outside and inside of the transformer to remove dust, dirt and other debris.

It is also important to check the oil frequently. Make sure the oil is at the proper level. You should also take an oil sample and test it. You don’t want to use contaminated oil. Finally, pay attention to temperature and air pressure. You need to make sure the transformer is within the recommended levels.

As with any electrical equipment, there is always a risk of fire. In the event of a fire, it is important to ensure that oil does not leak from the transformer. Oil can cause fires to spread, making hazardous situations more dangerous.

Oil transformer FAQ

How is it different from a dry transformer?

While both types serve the same purpose, dry-type transformers use air or other insulating media for cooling, while oil-immersed transformers rely on oil.

How does oil-immersed transformer handle overload?

Oil helps dissipate excess heat during overload. However, continuous overload can degrade the performance of the oil and transformer components.

Are oil-immersed transformers more efficient than dry-type transformers?

Generally speaking, oil type transformers have better cooling capabilities and can be more efficient. However, the best choice depends on the specific application, location and operating requirements.

In conclusion, oil-immersed transformers have many advantages and are generally a better choice than dry-type transformers. They are efficient and affordable and can run at almost any capacity. While they do require maintenance and pose some safety risks, with proper care and use, you’ll be able to get the most out of your equipment.

Nantong Dazheng Electric is committed to providing high-quality electrical equipment for your business needs. We offer a wide range of safe and reliable oil-immersed transformers to suit every situation. Contact one of our expert representatives today for help choosing the transformer that best suits your needs.

 

Distribution transformers are one of the important equipment in the power supply and distribution systems of industrial and mining enterprises and civil buildings. Since oil-immersed transformers have the characteristics of excellent performance and low price, the vast majority of power transformers use transformer oil as insulation and cooling medium.

Characteristics of oil-immersed transformer

1) Used in conjunction with fiber materials, it has good insulation performance, can reduce the insulation distance and reduce costs.
2) Transformer oil has low viscosity and good heat transfer performance.
3) It can well protect the core and windings from the influence of moisture in the air.
4) Protect insulating paper and insulating cardboard from the effects of oxygen, reduce the aging of insulating materials, and extend the life of the transformer.
At present, except for some special-purpose small and medium-capacity transformers and gas transformers, the vast majority of large and medium-sized transformers still use transformer oil as a cooling and insulating medium.
The insulation heat resistance grade of a transformer impregnated with transformer oil is Class A, and the long-term operating temperature is 105°C.

Applicable places for oil-immersed transformers

1. Non-enclosed oil-immersed transformers: mainly include S8, S9, S10 and other series products, which are widely used in industrial and mining enterprises, agriculture and civil buildings.
2. Closed oil-immersed transformers: mainly include S9, S9-M, S10-M and other series of products, which are mostly used in places with a lot of oil pollution and chemical substances in the petroleum and chemical industries.
3. Sealed oil-immersed transformers: mainly include BS9, S9-, S10-, S11-MR, SH, SH12-M and other series products, which can be used for power distribution in various places such as industrial and mining enterprises, agriculture, and civil buildings.

Maintenance and safety precautions for oil-immersed transformers

There are maintenance and safety considerations for oil-filled transformers. Keeping your transformer well maintained can extend its service life and reduce the risk of safety issues.
You should perform regular visual inspections and cleanings. Inspect the transformer to ensure that all components are in good condition and there is no threat of leakage. Make sure all fittings are tight. Clean the outside and inside of the transformer to remove dust, dirt and other debris.
It is also important to check the oil frequently. Make sure the oil is at the proper level. You should also take an oil sample and test it. You don’t want to use contaminated oil. Finally, pay attention to temperature and air pressure. You need to make sure the transformer is within the recommended levels.
As with any electrical equipment, there is always a risk of fire. In the event of a fire, it is important to ensure that oil does not leak from the transformer. Oil can cause fires to spread, making hazardous situations more dangerous.

Oil transformer FAQ

How is it different from a dry transformer?

While both types serve the same purpose, dry-type transformers use air or other insulating media for cooling, while oil-immersed transformers rely on oil.

How does oil-immersed transformer handle overload?

Oil helps dissipate excess heat during overload. However, continuous overload can degrade the performance of the oil and transformer components.

Are oil-immersed transformers more efficient than dry-type transformers?

Generally speaking, oil type transformers have better cooling capabilities and can be more efficient. However, the best choice depends on the specific application, location and operating requirements.

In conclusion, oil-immersed transformers have many advantages and are generally a better choice than dry-type transformers. They are efficient and affordable and can run at almost any capacity. While they do require maintenance and pose some safety risks, with proper care and use, you’ll be able to get the most out of your equipment.

Nantong Dazheng Electric is committed to providing high-quality electrical equipment for your business needs. We offer a wide range of safe and reliable oil-immersed transformers to suit every situation. Contact one of our expert representatives today for help choosing the transformer that best suits your needs.