The Ultimate Guide To 400kVA Transformer

To understand about 400kva transformer, first, you need to figure out what kVA means to a transformer. To explain in an easy way, kVA is the unit of the maximum power a transformer can transfer. But to be more specific, apparent power. Most electric power loads are inductive loads and their apparent power is equal to the vector sum of active power and reactive power.

 

Daelim is a transformer supplier with UL/cUL listed. Daelim offers 400kVA oil-immersed transformers and dry-type transformers.

 

Daelim already exported many power distribution transformers and dry transformers around the world and received customers' recognition of product quality. Now let's take a closer look at the specifications of the 400kva transformer, the load capacity of the 400kVA transformer, the weight of the 400 kVA transformer, the oil capacity of the 400kva transformer, the impedance of the 400kva transformer, and the size of the 400 kVA transformer.

Table of contents

1. What is the meaning of 400 kVA transformer? 2. 400 kVA Transformer Types 3. How many loads can a 400 kVA transformer handle? 4. How much does a 400 kVA transformer weigh?  5. 400 kVA transformer specification 6. 400 kVA transformer oil capacity  7. 400 kVA transformer dimensions  8. 400 kVA transformer impedance  9. How do I choose a 400kVA transformer?  10. 400 kVA transformer customization and for sale

 

What is the meaning of 400 kVA transformer?

If someone is looking for a 400kVA transformer, it is of great possibility that he is looking for a distribution transformer or a dry type transformer. And the capacity of transformers can be customized in Daelim. Firstly, let’s talk about distribution transformers. Generally, people use distribution transformers for distributing the high power into the ratings for daily use. A distribution transformer is often less than 200MVA in capacity. And another possibility is dry type transformer, which is also called cast resin transformer. Dry-type transformers don’t use any liquid insulation. The core and windings are sealed in a vacuum tank instead of an oil tank.

Try for free: Pad Mounted Transformer

 

400 kVA Transformer Types

As we have mentioned before, 400kVA transformers are often distribution transformers and dry type transformers. Now let’s have a detailed talk about these two types of transformers. In Daelim Transformer, distribution transformers are 3 phase oil immersed. This type of transformer is used to keep electrical energy from the basic distribution network to a minor distribution user. This form of transformer sends the current to a secondary distribution case and also decreases the voltage of the primary component. These types decrease the voltage source for the primary network according to the user's requirement. Customers choose voltages according to the occasions the transformers will apply, such as residential areas, commercial areas, industries, and so on.

For dry type transformers, they can be used in high moisture environments for the windings of the transformer are protected by epoxy resin. Dry-type transformers ratings are often available from 25kVA to 12500kVA.Customers choose dry type transformers for the advantages as follows:

1. They have better overload capacity.
2. They are of low loss and high efficiency.
3. They are less likely to cause a fire so they can be installed indoors.
4. They are oil-free and environmentally friendly.

Thus, for projects like indoor installation, the oil and gas industry, renewable energy, and environmentally fragile areas, it is a good choice to use dry-type transformers.

Learn more now: The Ultimate FAQs Guide To 225 kVA Transformer

 

How many loads can a 400 kVA transformer handle?

First of all, we need to figure out what The load capacity of a transformer tells how many amperes a transformer is designed to load. To know about the load capacity of the transformer, you can confirm if your transformer is too big or small in size. To calculate the load capacity of a transformer, you need to know the line voltage of the secondary output of the transformer, and if it is a single-phase transformer or a three-phase transformer. The formula of the calculation is kVA*1000/secondary voltage. After knowing this information, you can get started.

Transformer rating can be calculated by the following formula： P=√3*V*I

400kVA= √3.* 415v *I

I=400*1000/√3* 415v = 556 Amp

Read more: Everything You Need To Know With 250 kVA Transformer

 

How much does a 400 kVA transformer weigh? 

Transformers’ weight is an important specification for customers to consider before buying a transformer. The weights of the transformer usually consist of two parts: total weight and oil weight. Generally speaking, at the same rating capacity, oil-immersed transformers are usually much heavier than dry-type transformers. In general situation, for a 400kva distribution transformer, the total weight is often under 2000kg and the oil weight is often under 500kg. While for a dry-type transformer, the weight is usually no more than 700kg. And the specific weight is based on customers' needs. It is now important for manufacturers to make the transformers lighter and, at the same time, provide high efficiency and good performance.

 

400 kVA transformer specification

There are always many items contained in a transformer’s specification. For both sides customer and provider, it is important to confirm the specification before potting into production. Because transformers are customized and each transformer is one and only. For 400kVa transformers in Daelim, there are oil-immersed distribution transformers and dry-type transformers. And Daelim Transformers are made according to ANSI/IEEE/CSA/IEC Standards and some other standards. The following contents are usually presented in the specification of a transformer: the supplier, model, country of origin, standard manufacturing and testing, features, losses, high and low voltage electrical characteristics, impedance, colors, weight and dimensions, accessories, warranty, and so on.

Try for free: Pad Mounted Transformer CSA C227.4 National Standard of Canada

 

400 kVA transformer oil capacity 

For different types of transformers, the oil capacities are not the same. As we have just mentioned before, for a 400kva oil-immersed distribution transformer, the oil capacity is often less than 700kg. Except for mineral oil, Daelim can also provide our customers with other types of oil like FR3 oil, which is often used in green energy projects are is more environmentally friendly, but at the same time, more expensive. For a dry-type transformer, there is no need to talk about the oil capacity.

 

400 kVA transformer dimensions 

For different kinds of transformers, the dimensions are different. And rating capacities, high and low voltage even affect the dimensions of transformers. For oil-immersed distribution transformers, the depth is often around 2000mm, the width is often around 1500mm and the height is often around 1600mm. For dry-type transformers, the width and height are often around 1000mm, and the depth is often no more than 1000mm. But the specific dimensions are still based on customers’ needs.

Get it now: The Ultimate FAQs Guide To Oil Type Transformer 

 

400 kVA transformer impedance 

The impedance is also a very important specification of transformers. The impedance of the transformer is an important specification and is often represented by %. The impedance is measured by the short circuit test in the factory. It is of great significance to short-circuit current. The standards of the transformer have clear references for impedance and loss. When you increase or reduce the impedance voltage, it is unreasonable if the loss still sticks to the standard requirements. If the impedance voltage becomes smaller, a reasonable change should be: no-load loss becomes larger, load loss becomes smaller; if the impedance voltage becomes larger, an appropriate change should be: no-load loss becomes smaller, and load loss becomes larger. For a 400kVA transformer in Daelim, the impedance is often 4%.

Get it now: The Impact of Impedance on Transformer Design

 

How do I choose a 400kVA transformer? 

Before buying a transformer, the first thing for customers to think about is what are you going to do with the transformer. Compared with other types of transformers in Daelim transformers, 400kVA transformers are less asked for by our customers. And the oil immersed distribution transformers and the dry-type transformers are not our main products. 400kva distribution transformers are small in capacity and small in size. They are often asked by customers in Asia and Africa. And they are frequently used in less environmentally requirements occasions such as factories, workshops, oil mines, and something like this. As for dry type transformers, they are environment-friendly. They are often used in chemical plants, indoor areas, and environmental protection reserves. They do not release harmful liquids or gas.

Ｋeep reading: Ultimate guide of cast resin dry type transformer

400 kVA transformer customization and for sale

In Daelim Transformers, all of our transformers are customized. We don’t have transformers in stock so the earlier you order and pay, the faster you get your transformers. For now, our main products are single phase pole mounted transformer, pad mounted transformer, small substation transformer, and HV power transformer. Most of our customers are from  North America and South America. But we also provide the same service for customers from other regions and countries. For our customers, you can provide us with the rating capacities, primary and secondary voltages, and the quantities of the transformers you will need and we will quote you the best price and lead time we can offer. As for 400 kVA oil immersed distribution transformers, the price will be 30000-70000 dollars according to different winding materials and technical requirements. As for 400kva dry-type transformers, the price is around 5800 dollars. So the specific price is still based on customers’ requirements.

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Daelim Transformer is a professional transformer manufacturer with more than 20 years of exporting experience. We have gained our reputation and trust from our customers in North America and South America by day to day efforts and good service to our customers. We make ideal solutions for solar power, wind power, energy storage, mining industries, cryptocurrency, and utilities. No matter when you need solutions for your projects, we are always here.

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