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10/11kV Oil-Immersed Transformer

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Oil-lmmersed Power Transformer

In many other countries, particularly in regions following British or IEC standards (e.g., parts of Africa, the Middle East, Southeast Asia, and the United Kingdom), the 11kV voltage class is the backbone of distribution systems. 11kV transformers are commonly installed in pole‑mounted or ground‑mounted substations, serving small industrial zones, mining sites, rural electrification projects, and public utilities. They are also used in renewable energy projects, such as solar farms and small hydro plants, to step up or step down voltage for grid connection.

Email：info@byttransformers.com

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Applications and Advantages of 10/11kV Oil‑immersed Transformers

Applications

10/11kV oil‑immersed transformers are widely used in medium‑voltage power distribution networks. In China, the 10kV voltage class is the standard for urban and rural distribution grids, supplying power to residential communities, commercial buildings, industrial factories, and agricultural facilities. These transformers step down the primary voltage from 10kV to secondary voltages such as 0.4kV or 6.6kV, depending on the load requirements.

In many other countries, particularly in regions following British or IEC standards (e.g., parts of Africa, the Middle East, Southeast Asia, and the United Kingdom), the 11kV voltage class is the backbone of distribution systems. 11kV transformers are commonly installed in pole‑mounted or ground‑mounted substations, serving compact industrial zones, mining sites, rural electrification projects, and public utilities. They are also used in renewable energy projects, such as solar farms and tiny hydro plants, to step up or step down voltage for grid connection.

Advantages of the 11kV Voltage Class

The 11kV voltage class offers several practical advantages. First, it is a well‑established international standard, widely recognised in countries that follow IEC or British Standards. This makes it easier to source compatible equipment, spare parts, and accessories across different markets.

Second, compared to lower voltages such as 400V or 6.6kV, 11kV allows for longer power transfer distances with lower line losses. A utility can use thinner conductors to deliver the same amount of power over a given distance, reducing material costs for overhead lines and cables.

Third, 11kV transformers are more compact and economical than higher voltage classes (e.g., 33kV or 35kV) for typical industrial and commercial loads. They strike a good balance between power handling capacity and equipment cost, making them the preferred choice for many medium‑sized facilities.

Fourth, 11kV systems offer enhanced safety and fault tolerance. The lower voltage level reduces insulation stress and simplifies overvoltage protection requirements. This results in lower maintenance costs and higher reliability for end users.

Finally, because 11kV is a common voltage for distributed generation, many solar, wind, and biomass projects use 11kV as the connection point to the local grid. This creates a stable demand for 11kV transformers in the growing renewable energy sector.

About KAIBEITE

KAIBEITE is a transformer manufacturer with over 15+ years of experience, specialising in the design, R&D, and manufacturing of electrical equipment. Its main business includes oil‑immersed and dry‑type transformers, prefabricated substations, and high‑ and low‑voltage switchgear. The company’s products are exported to regions including Asia, Europe, South America, and Africa.

Product Parameter

30-2500KVA 6-11KV Oil-immersed transformer
Rated Capacity (kVA)	Voltage Combination			Vector Group	No-Load Loss(w)	Load Loss	No-Load Current (%)	Short Circuit Impedance (%)
Rated Capacity (kVA)	High Voltage（kV)	Tapping Range	Low Voltage (kV)	Vector Group	No-Load Loss(w)	Load Loss	No-Load Current (%)	Short Circuit Impedance (%)
30	11 10.5 10 6.3 6	±5% ±2×2.5%	0.4	Dyn 11 or Yyn0	130	630	2.1	4
50					170	910	2.0
63					200	1090	1.9
80					250	1310	1.8
100					290	1580	1.6
125					340	1890	1.5
160					400	2310	1.4
200					480	2730	1.3
250					560	3200	1.2
315					670	3830	1.1
400					800	4520	1.0
500					960	5410	1.0
630					1200	6200	0.9	4.5
800					1400	7500	0.8
1000					1700	10300	0.7
1250					1950	12000	0.6
1600					2400	14500	0.6
2000					2850	19500	0.6	5
2500					3000	21200	0.6	5

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FAQ

Q1.Do you have MOQ?

Depends on different ideas, Can be negotiated.The larger the quantity is, the competitive the unit price will be.

Q2.Should the customer pay the delivery fee,How much is it?

For the delivery fee, many samples are be requested to be sent,so we must get delivery fee. If you tell me to use the appointed Express, you will give me your express account or you will pay according to the Express.

If you do not request, I will choose a cheap one in China.

Q3.How about the after sale service?

1)We will always keep the quality the same as the buyer's samples and if there is something with the quality, we will make compensation for our customers. 2)We will suggest our packing and take charge in our packing, we will keep the goods safe in the delivery. 3)We will trace the goods from the production to selling, we will solve the problems in the selling for our customers.

Q4.When can I get a price？

We usually quote within 24 hours after we get your inquiry.

Q5: Are you a trade company or manufacturer?

We are a professional manufacturer with our own factory.

Key words:

Oil Immersed Transformer

11kV Oil-Immersed transformer

11 to 0.4kV

Rectifier and Furnace Transformers

13.2kV/13.8kV oil-immersed transformer

Rectifier and Furnace Transformers

13.2kV/13.8kV oil-immersed transformer

Product Classification

Oil-lmmersed Power Transformer

Dry-Type Power Transformer

High And Low Voltage Switchgears

Other Products

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