Ultimate 500 kVA Transformer For Guide

The 500 kVA transformer plays the role of converting electrical energy in the power distribution system and is usually installed in the end-use area for residential lighting, industrial production, etc.

Daelim is a top transformer manufacturer in China, and its products have obtained UL/cUL, CSA, CESI, and other certifications and product testing reports. Focusing on the international market for nearly 20 years, especially understanding various international standards, such as IEEE/ANSI, CSA, DOE, AS, GOST, IEC, etc. For a 500kVA transformer, Daelim produces and designs the types: pad mount transformer, small substation transformer, distribution transformer, and dry transformer.

What is the meaning of 500 kVA transformer?

kVA is the capacity unit of a transformer. The 500 kVA transformer means that the capacity of this transformer is 500 kVA, and it also means that the apparent power of the transformer is 500kVA = KiloVolt-Ampere.

KVA is used as the unit because it is impossible to obtain the values of active power and reactive power when the load is not clear. At this time, KVA is used as the unit, which usually means apparent power, symbol S.

The guaranteed value of the output capacity of the transformer in the rated state, expressed in kilovolt-ampere (kVA) because the transformer has high operating efficiency, the rated capacity design value of the primary and secondary windings is usually equal.

S^2=P^2+Q^ is the relevant formula.

KVA is the apparent power, which includes active power and reactive power. Kilowatt KW is active power. Kilowatt (KW) = kilovolt-ampere (KVA) times power factor. The power factor is generally 0.8 so 500*0.8=400KW.

But we all know that the transformer has a load rate, which means that the actual power KW of the 500KVA transformer is lower. It is most suitable when the long-term load rate of the transformer is about 50% to 70% of the rated capacity. Under this condition, the power loss is minimal. Usually, the load rate of the distribution transformer should be 70% to 85%.

500*0.8*0.70 = 280kw; 500*0.8*0.85=340kw

Therefore, from a safety point of view, the actual power that a 500kVA transformer can drive is 280kw-340kw.

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How many houses will 500 kVA transformer serve?

It is not easy to answer this question precisely, because the situation of each city and region is different, and the electricity consumption is very different. In some places, the seasons are like spring, and there is no need to turn on the air conditioner (high-power electrical equipment); in some places, it is very hot, and the air conditioner and other equipment need to work for a long time.

Let's take an example to roughly calculate how many households a 500kva transformer can supply. The average housing area of each household is 80-120 square meters, and each household is calculated according to the power consumption of 5000W. Then we calculated that the total available power of the 500kva transformer is 280-340kw, and the electricity consumption coefficient is 0.4, 280÷4÷0.4=175; 340÷4÷0.4=212. Therefore, it is estimated that a total of 175-212 households can be served by a 500kva transformer.

Learn more: How Do I Choose A 1500kva Transformer In 2022?

500 kVA transformer types

There are many types of 500 kVA transformers on the market, let's talk about the transformer types in detail.

The number of phases can be divided into:

500kva transformer single-phase transformer, It can be used in single-phase power systems, and can also form a three-phase transformer group;

500kva three-phase transformer, used for voltage step-up and step-down of a three-phase system.

Read more: How Much You Know For The Different Types Of Transformers?

According to structures, different cooling and insulating medium can be divided into:

500kva gas insulated power transformer: using synthetic gas sf6 as cooling and insulating medium, small size, fireproof, but the poor cooling effect, not environmentally friendly, generally used in urban underground substations.

500 kVA oil transformer, using mineral oil, and vegetable oil as cooling medium and insulating medium. The advantage is that in the case of repeated temperature changes, the performance can be restored, but the oil is not fireproof or explosion-proof, the insulating oil also needs regular inspection and maintenance, and the workload is relatively large. Generally, it is a distribution transformer, which is divided into:

500kva pole-mounted transformer, this type of transformer is usually mounted on a pole and supplies power directly to the end user.

500kva oil-immersed transformer is a floor-standing transformer, usually installed on the ground outdoors.

500 kVA pad-mounted transformer, this type of transformer is usually installed on a square lime table, which is safe, reliable, and easy to operate. It is widely used in residential areas, commercial centers, schools, and other places. It is also the best choice for Bitcoin mining farms.

Read more : 3 Phase Pad Mounted Transformer-Daelim Belefic

500kva transformer according to the cooling method, can be divided into:

Oil-immersed self-cooling transformer, oil-immersed air cooling transformer, dry type self-cooling transformer, dry type air cooling transformer;

Try for free: How much do you know about oil-immersed distribution transformers?

According to the conductor material is divided into:

500kVA copper transformer, 500kVA aluminum transformer.

What is the output voltage of a 500kVA transformer?

The output voltage of the 500kVA transformer is different between single-phase and three-phase:

The single-phase output voltage is usually: 120-240V, 240-480V, 347V, 600V, etc.;

The three-phase output voltage is usually: 208V, 240V, 400V, 480V, 600V, 480Y/277V, 600Y/347V, etc.

How many amps can a 500 kVA transformer supply?

Here is the formula for converting the transformer capacity into the current. Single-phase is different from three phase.

Single-phase transformer: The rated capacity is divided by the rated voltage, and then multiplied by 1000, which is the rated current A.

Three-phase transformer: The rated capacity is divided by the rated voltage, then divided by 1.732, and then multiplied by 1000, which is the rated current A.

Therefore, if the 500 kVA transformer is single-phase and the rated voltage is 240V, 500÷240×1000=2083A

Three-phase 500kVA transformer, if the rated voltage is 480V, 500÷240÷1.732×1000=1202A

The rated voltage is different, and the calculated amps value is also different.

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500 kVA transformer weight

The weight of 500kva oil change and dry change is different

The weight of 500 kVA oil transformer is about 1700kg

The weight of 500 kVA cast resin dry-type transformer is about 2000kg

How much copper is in a 500 kVA transformer?

The copper content of oil-immersed transformers and dry-type transformers is different:

If it is oil type, the copper content is generally 20% of the total weight of the transformer; the copper in the 500kva transformer oil transformer is about 340kg.

If it is dry type, the weight of copper content is generally 30% of the total weight of the transformer, and the copper in the 500kVA cast resin dry type transformer is about 600kg.

Read More: Ultimate guide to cast resin dry-type transformer

How much oil is in a 500 kVA transformer?

The content of oil in oil-immersed transformers is about 14%-20% of the total weight. There is about 214-306L transformer oil in the 500 kVA transformer.

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500 kVA transformer specification

500 kVA distribution transformer specification

500kva 2400-480v pad mount transformer specification

Learn more: How to choose pad-mounted transformer for your project?

500 kVA dry type transformer specification

How much is a 500kva transformer?

The price of an oil transformer and a dry transformer is different, and the price of a 500 kVA dry transformer is more expensive than a 500 kVA oil transformer.

The 500kva pad-mounted transformer price is about $10,000. If there are many requirements for accessories and different standards, the price will also vary.

500kva oil-immersed transformer, the higher the voltage level, the higher the price, usually $6060-1000.

The price of a 500kva cast resin dry-type transformer is about $9090-13600.

Keep reading: How to choose the best distribution transformer?

How to install a 500 kVA transformer?

1. 500 kVA transformer should be checked and tested as follows before installation:

(1) According to the design and the instruction manual of the transformer, check whether the model and specifications of the transformer conform to the design requirements and whether the accessories are complete.

(2) Check whether the appearance of the transformer body and accessories is damaged and oil leakage, and whether the seal is in good condition. If the casing should not seep oil, the surface should be free of defects.

(3) Carry out the withstand voltage test on the transformer oil. After the power transformer is newly installed or overhauled, the insulation withstands voltage tests should be performed on the oil. Its standard is the new oil: the withstand voltage below 1.5kV is not less than 25kV; the withstand voltage of 20-25kV is not less than below 35kV. Oil in operation: The withstand voltage of 15kV and below is not less than 20kV; the withstand voltage of 20-25kV is not less than 30kV. In addition, the transformer oil should be tested for viscosity, freezing point, flash point, density, and acid medium.

(4) Measure the insulation resistance of the transformer. The insulation resistance value of the newly installed and overhauled transformer should be converted to the same temperature, and should not be lower than 70% of the manufacturer's test value.

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2. Selection of installation location

1) The 500kva transformer should be considered to be installed close to the power center to minimize the power supply range.

2) Keep away from flammable, explosive, and polluted areas.

3) The installation location of the 500 kVA transformer should be convenient for construction and maintenance.

3. Installation method

The installation methods of 500kva transformers include column type, ground type, floor type, etc.

(1) On-column formula. Install the transformer on the utility pole 2.5-3m from the ground, install the busbar 2m above the workbench, connect the high-voltage leads to the busbar frame, install cross arms on the poles, and install outdoor drop-out fuses, arresters, and lead wires. This kind of transformer table is stronger than a single-pole transformer table, but it uses more materials and higher cost and is suitable for voltage of 10/0.4kV.

(2) Grounded transformer table. Install the transformer on a 2m high pier.

(3) Floor-standing transformer table. Put the transformer on the ground platform, and there must be fences and warning signs of high voltage danger and electric shock around it.

(4) Indoors, dry transformers are generally used indoors, because indoor transformers have relatively high requirements for fire protection, explosion-proof, environmental protection, and other standards. Transformers installed indoors should pay attention to smooth ventilation.

4. Installation requirements for distribution transformers

Under normal circumstances, distribution transformers generally have two installation methods: one is the installation method on the column; the other is the installation method on the table. When using these two installation methods, the distance between the bottom of the transformer and the ground should not be less than 2.5m.

Floor installation should not be used unless it is temporarily used. If the floor installation method is adopted, the transformer should be placed on a firm platform with a height of not less than 0.3m (if the local maximum flood level is higher than 0.3m, it should be determined according to the maximum flood level). A solid barrier to prevent people and animals from entering should be set up around it. Walls or fences can be built. The height should not be less than 1.8m, and the distance from the outer contour of the transformer should not be less than 0.8m. Set up a barrier with a height of at least 1.8 meters, and leave the distribution point for the quarter-finals." If a fence is used, the gap between the two railings should not be less than 0.1m.

Pad-mounted transformers cover a smaller area than roof installations, have compact structures, and especially have higher safety performance, making them the first choice in economically developed areas.

Read on: How to choose pad-mounted transformer for Crypto Mining?

When the transformer is placed in a special transformer room, the room should be well ventilated and dissipated. For the combustible oil-immersed transformer room, the fire resistance level should be Class I, and the distance between the four walls and the door and the outer contour of the transformer should not be Less than the 0.8m requirement.

5. Precautions for installation of distribution transformers

1)Anti-fall from high altitude

A. Before the operator climbs the pole, check whether the pole-mounting tool is safe and reliable, and can only climb the pole after confirming that it is correct;

B. When the operator climbs the pole: "step on firmly, hold hands firmly, ascend slowly step by step, reach the position first, and fasten the safety belt firmly";

C. The seat belt should be fastened on a firm and reliable component. If the working position is changed, the seat belt should be fastened again.

2) Anti-electric pole toppling and hurting people

Before the operator climbs the pole, observe and estimate the buried depth of the pole, and confirm that it is stable before climbing the pole.

3) Prevent falling objects from injuring people

A. The ground crew tries to avoid staying under the pole;

B. Ground staff wear safety helmets;

C. Use ropes to transfer tools and materials, and try to avoid falling objects from high altitudes;

D. When operating the falling wire tool, the operator should choose the operating position to prevent the wire tube from falling and hurting people.

4) Prevent the transformer from falling or dumping and hurting people:

A. When lifting the transformer, check and confirm that the lifting appliances (beams, steel wire sleeves, inverted chains, etc.) are safe and reliable.

B. After the transformer is in place, do not loosen the hoisting equipment until it is firmly fixed.

C. During the lifting of the transformer, no one is allowed under the transformer;

D The transformer should be bundled securely when transporting it.

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Step-by-Step Guideline On Installing A Transformer

What size electrical cables feed out of a 500kva transformer?

The incoming current is about 500/1.732×10=29A, choose 35 or 50 square copper core cables; 2. The outgoing current is about 500/1.732×0.4=720A (current and voltage are inversely proportional) When the rated load of the transformer is working, the outgoing line chooses two 185 square copper core cables.

Where to buy a 500kVA transformer?

There are many channels for purchasing 500kVA transformers, such as local transformer dealers and transformer manufacturers; power exhibition halls; in recent years, with the development and development of the Internet, more and more transformer demanders choose online channels to buy, because More convenient, economical and faster, and more options. What needs to be reminded here is that when choosing a transformer supplier on the Internet, you must understand the supplier's qualification certificate, experience, technical expertise, etc.

Get it now: How To Purchase 3000kVA Transformer In USA & Canada?

500 kVA transformer for sale

Daelim is a professional transformer manufacturer located in Hai'an City, Jiangsu Province, China, with nearly 20 years of experience in transformer design and export. A professional technical team can provide you with the best solutions for your 500kva transformer, whether it is single-phase, three-phase, oil transformer, or dry transformer, whether you are from the United States, Canada, Australia, and Denmark, our engineers have rich experience. Design experience to meet international standards such as DOE/IEEE/CSA/AS/ANSI/GOST.

Daelim factory has an ISO9001 quality management system certificate, environmental management system certificate, and occupational health and safety management system certificate. Product certificates include CSA, UL, CESI, NEMA, etc., and third-party testing reports for transformers include SGS, CSA, CNAS, etc.

Now due to the epidemic, many customers cannot come to the factory for inspection, so Daelim supports and cooperates with customers to conduct live video factory inspections or entrust local companies in China to conduct on-site factory inspections. The production progress of your transformer order can be checked at any time on the website (picture video).

Daelim has nearly 20 years of experience in exporting transformers, so you don't have to worry about the packaging and transportation of transformers, and you will receive high-quality transformers safely and smoothly at the fastest speed. Daelim has many after-sales service teams around the world that can provide you with transformer installation services.

How much does a 150 kVA transformer cost?

The cost of a 150kva single-phase transformer is lower than that of a three-phase transformer.

The price of the conventional configuration of 150kva single phase pole mounted transformer is about 2600 US dollars, depending on the parameter requirements of the transformer;

The price of the conventional configuration of 150kVA single phase pad mounted transformer is about 6500 US dollars.

The price of a 150kva 3-phase pad mounted transformer conventional configuration is around $6000.

The price of the conventional configuration of 150 kVA oil transformer is about 4000 US dollars.

The price of the regular configuration of the 150kva dry transformer is around $7800.

The above prices of 150kva transformers are for reference only, and the specific technical parameters of the transformers are required, and the cost calculated by professional transformer engineers shall prevail.

400kVA Transformer

There are many types of 400kVA transformers, oil-immersed, dry type, pole-mounted, substation style, and pad mounted. Its high voltage ranges from 6kV to 35kV, and its low voltage is 120-800v. If you need the price of the above types of transformers, please contact Daelim immediately.

How big is a 300kva transformer?

Usually, the weight of a 300 kVA transformer is about 1500kg;

Try for free: What is a Live Front 25kv Pad-Mounted and Substation Transformer Specification?

300kva pad-mounted transformer size:

S11-M 300kva distribution transformer size:

300kva cast resin transformer size:

How much does a 112.5 KVA transformer weight?

Generally, a 112.5kva transformer is pad-mounted transformer, its weight is about 750kg.

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