1 MVA Distribution Transformer 20kv to 400v
Three phase Pad mounted transforner
250mva 220kv Three-Phase Power Transformer

Three Phase Pad-Mounted and Power 1 MVA Transformer

Transformers are beneficial devices that modify alternating current from different level voltages. It can go either way to change the voltage, a “step-up” or a “step down.” It works on something called a magnetic induction principle. Transformers have no moving parts. They are entirely stationary devices.Despite our dependence on electricity, the world is still full of less-developed areas. That’s why industry experts such as those from Daelim are pushing hard to find ways to deliver power where it can do the most good without adding excessive strain to our planet’s resources or its climate. In this spirit of finding more earth-friendly ways to bring power to more people, one of the latest innovations in an electric generation has arisen in recent years the 1 MVA Transformer. It has multiple types including: distribution Transformer, Three-phase power transformer and Pad Mounted Transformer.

They allow for long-term stability and have little to no chance of parts going out of place. If a transformer’s function confuses you, it is crucial to understand that it doesn’t generate electricity. It transforms power from one circuit to another, hence the name transformer.

Learn more about the different types of transformers and their applications at Daelim. For over 15 years, Daelim has been dealing with the designs and manufacturing of high-quality electrical products and equipment. Anything you need to know about transformers you are likely to find on their website.

1 MVA Transformer : The Ultimate FAQ Guide

What Is A 1 MVA Transformer?

An MVA transformer is an electronic device that converts one alternating current into another alternating current with the same voltage but 180 degrees out of phase. In other words, you can change phase one from a sine wave to something entirely different in an instant—but without any humps or dropped power lines.

An MVA transformer measures electrical power from 1 megawatt to 100 megawatts and transforms it to lower voltages for transmission over long distances.

MVA stands for “medium voltage alternating current,” that is, the type of power transmission grid where the voltage is between 11 and 69 kilovolts. A typical MVA Pad Mounted Transformer has a 2:1 ratio of primary to secondary windings, generating a 22-kilovolt output voltage from a primary voltage of 44.5 kilovolts. The input side employs high-voltage wire with insulation rated at 440 volts or more; it must be located underground or behind protective barriers at least 10 feet tall.

MVA is a rating that is given to transformers. “VA” is the unit measurement of the power (Volt-Amp). The different letters that come before, like kVA and MVA, refer to the magnitude. Transformers can technically be rated by VAs only. kVA and MVA are used to rate the bigger-sized transformers.

To make things simpler, it indicates the amount of power a transformer can handle. This value is essential when acquiring a transformer. It can be the basis if the transformer can handle the specific purpose it needs to serve.

1 MVA Three phase Pad-Mounted transformer 250mva 220kv

Features to Check in an MVA Transformer

There are a few things to check when looking for a transformer. That includes the following: 

Phases Needed

Transformers have different types. Three-phase transformers, two-phase transformers, and single-phase transformers. Single-phase Pad Mounted Transformer are common in households since they can handle small machinery. Small businesses may need the two-phase transformer, and big companies usually opt for the three-phase transformers. 

Voltage Requirement

It is also important to see how the transformer changes the voltage. Some transformers change 110 Volts to 220 Volts, and others do it vice versa. This is the primary function of transformers. In line with this, it is also essential to know the voltage level of the power supply. The input voltage should be based on this and the output voltage on what is required. 

Frequency Requirement

The frequency is a crucial thing to look into when buying a transformer, especially when using appliances and machines imported from different countries. For example, the US uses a frequency of 60 Hertz while the UK uses 50 Hertz. Using devices from the UK in the US would most probably need a transformer. 

Purpose and Location

Knowing the purpose will help you understand what kind of a Pad Mounted Transformer to get, whether a step-up, step-down, or power transformer.

Knowing where the transformer will be placed at home or whichever building is also essential. It will help you determine the size of the Pad Mounted Transformer. Moreover, it helps prevent putting it somewhere hazardous. 

The Standard Ratings for an MVA Transformer

Transformers are rated by engineers according to the highest output voltage and current they can deliver. Any given unit will have a specific volt-ampere capacity. Quality transformers are a very important component of any well-built power supply. 

Transformers, more often than not, are the most expensive part to replace in a power supply. That is why rating transformers correctly and adequately are key to prevent misuse of a transformer. This will, in turn, prevent breakdowns or burnouts. 

A transformer rating nameplate will have a couple of things listed on it:

  • Manufacturer name
  • Frequency
  • Rated MVA
  • Primary and Secondary Voltages
  • Clearances
  • Temperature Class
  • Insulating Liquid Amount

How does 1 MVA Transformer work?

MVA Transformer transformers are typically coupled to a substation and their output is transmitted over high-voltage transmission lines to a distant building, industrial use site, or an intermediate substation. Transformer size and voltage ratings vary by design stated by US Electrical Code
A transformer that converts 3,000 volt AC electricity to 575 volts DC is called a 3:1 MVA transformer (or a 3:3:1 transformer). The primary winding has two coils with one winding inside the other. The 2:1 ratio is achieved by having one coil with twice as many turns as the other.

The 1 MVA is one of the best transformers Daelim is proud to manufacture. Complete to the international standards and made with the best quality materials sourced around the world.

Transformers can be used in technically anything that involves appliances, machines, and other things that need a power supply. Below are different uses for transformers:


Transformers help complete the process of manufacturing different metals such as zinc and aluminum. The electrolysis part of the completion process helps companies make these metals and incorporate them for various purposes. 

Control Electricity Flow

Maintaining a good voltage level in circuits is another thing that a Three-phase transformer is used for. This process helps prevent damage. It enables the stopping or starting of the electric current to cater to specific needs. This improves machine preservation and prevents defects due to high voltage levels.

Steel Manufacturing

Transformers are responsible for aiding the electricity for steel manufacturing industries. These industries need a constant and stable light source to function correctly. Transformers help regulate the light and thermal sectors for steel manufacturing. 


Air conditioners are everywhere. It possesses high inductance and low resistance levels, which constitute transformer use. Transformers allow the proper operation of AC units which is one of the present-day uses of transformers. Without transformers, you can forget long-lasting and heavy-duty AC machines. 


Air-dry form transformers play an integral part in the cooling function of refrigerators. It manages voltage levels in refrigerators that aid in cooling even without a longer flow of electricity. 

Battery Charging

Transformers also play an important part in battery charging. It controls the voltage level that enters the battery. This prevents damages from happening to the battery due to the unregulated voltage that enters it. 

What is on the inside of 1 MVA Transformer?

MVA Transformer is a complex machine that can be used to convert raw materials into usable items.

MVA Transformer is used for generating power using automobile vehicles and can be able to facilitate fuel transformation into electrical and kinetic energy. This conversion of energy occurs in an electric generator. It is a very economical and environmentally friendly technology with sustainable business models. MVA Transformer is considered the best investment unit available at an affordable price range. It provides an easy operation platform, which saves time and effort to customers while generating high-quality industrial output at acceptable prices in the market, making it a lucrative business for investors.

MVA Transformer is an automobile unit, powered by a combustion engine. It is a virtual revolution in the current automobile sector that uses MVA Transformer technology. It proves to be most useful and effective for the consumers due to various advantages such as most efficient operation, long-lasting durability along with almost zero maintenance cost, and high-speed performance.

Why should you have a 1 MVA Transformer?

With a 1 MVA transformer, you will have enough power to meet your household’s electricity needs with plenty of power left over for other electrical devices. Since these transformers are designed to provide sufficient electric current for homes and larger buildings, it can be difficult to find the right fit for smaller residences.

Running appliances in high-use rooms: You’ll never have to worry about experiencing short circuits when running appliances in high-use areas like the kitchen or laundry room with a 1 MVA transformer. This is much safer than using a transformer with a smaller capacity or using several transformers to provide electric power to appliances in multiple rooms.

Avoiding frequent trips to the hardware store: Smaller transformers require you to replace them more often because they can’t handle high-use devices like large televisions and microwave ovens. If you use a 1 MVA transformer, you’ll never have to worry about needing a new one.

With Daelim 1 MVA Transformers, you can assure your safety and energy efficiency.

Advantages of 1 MVA Transformers

Preventing electrical dryness: Electrical dryness occurs when your appliances are running but there isn’t enough power for them to function properly. This can lead to many problems like equipment not turning on or working properly, flickering lights, or an appliance that becomes unusable. This is why when using a 1 MVA transformer you’ll never need to worry about this dryness.

Avoiding fire hazards: A 1 MVA transformer will carry enough electricity through your home that you won’t have to worry about electrical fires in the kitchen or attic. No matter if your appliance has a dryer and a microwave, the 1 MVA Three-phase transformer will be able to provide enough power to both of them safely.

Using the right thermostat: A thermostat that works with 1 MVA Three-phase transformer can adjust the temperature of your home to fit your lifestyle. It is better than using a smaller transformer or several of them because it can provide the right power for your home’s electric needs.

Not needing a generator: No matter if you live in an area prone to big storms or experience regular outages, you’ll never need a generator when using a 1 MVA Three-phase transformer. This device will be able to provide enough electricity for your whole household and even have some leftover for other uses.

What type of transformer does the 1MVA work with?

The 1 MVA can work with any transformer! These are accurate regardless of frequency or voltage variations—making them ideal for lab use! 

A 1.0-1.5 MVA Pad Mounted Transformer is typically used to power the largest of industrial applications, such as a factory or power plant. If you have a large industrial application and need only one type of transformer, this size will usually suffice. However, large transformers are also very expensive and often require more than just metal to build them: copper wire in the shape of that part of the coil in which current flows must be carefully wound for optimal efficiency; heavy insulation must be inserted between each layer, and materials such as lead may also be necessary for shielding purposes. 

For this reason, many companies will find it more economical to use multiple smaller sizes rather than one larger size transformer outright. This means that a small- or medium-sized Three-phase transformer may be used for a single equipment load, while another size is used to power other equipment. These last two are referred to as “splitters”.

Splitters may be required at any point in the electricity supply system where there are multiple transformers in use, but particularly in step-down systems where multiple Three-phase transformer must share the same “common” high voltage line. 

What frequency can the 1 MVA work with?

The 1 MVA works with all frequencies. The 25-kVA 1 MVAR low-voltage switchgear is a standard operating voltage for the 1 MVAR work. The standard frequency range of the 25 KVA low-voltage switchgear is 80 Hz to 240 Hz. When used with smaller transformers, it can be used as a base loading unit or to power loads other than resistive loads.

What voltage can the 1 MVA work with?

The 1 MVA works with all voltages—up to 500,000 volts! 

The voltage is determined by the wire size and length of the power lines. For example, a 50 KV line might be 100 km long. This means that for every 100 km an extra 33 kV will be required, so for a 1 MVA substation, there will need to be an extra 66 KV input. To make things easy, the total number of amps that can be carried in each one-kilometer length of wire is 133 KA, and only 66.7 KV are needed per kilometer. 

A 33 kV line will need around 100 km of wire and this is why most lines in the grid are 33 kV. The higher the voltage of a line, the less power that can be carried over each kilometer. This means there must be a lot more power stations in places where the voltage is higher. For example, every one hundred kilometers an extra 66 KV must be provided for a 66kV line, and every 300 kilometers an extra 111 KV has to be provided for a 111k V line

How do I know if my transformer is the correct model?

All of our transformers at Daelim are made from first-rate parts like high-quality wire wound around a ferrous core, and are tested by our skilled technicians to ensure they perform as advertised!

How Much Copper Is Inside A MVA Transformer

Copper is the most commonly used conductor in power transmission systems. The majority of power generation today uses alternating current (AC) at 60 cycles per second. A transformer takes a direct current (DC) voltage from a utility line and converts it to AC. The copper conductor inside the coil that produces each phase of the AC signal is crucial to the Pad Mounted Transformer and wires distribution systems.

The amount of copper necessary for any given transformer depends on its output voltage and type, but generally will be about three meters of solid or stranded bare copper wire per pole, regardless of whether or not there are other metals in use – such as aluminum or iron – within that pole. Copper conducts electricity much better than other metals along with a sheet, and so it is this characteristic that makes copper an efficient conductor. Copper conducts electricity at the same rate as iron. It is also easier to work with and melts easily.

In a Pad Mounted Transformer installation, the electrical current must traverse the entire length of the steel core so that it can be easily removed for inspection. In order to do this while maintaining low losses due to resistance, the copper wire and insulation must be placed as closely as possible in contact with the metal surface of the core of the Three-phase transformer. In Daelim, we have the best professionals that will help you with your MVA Pad Mounted Transformer maintenance and checks.

Why Is a Transformer Rated in MVA?

A transformer is rated in MVA if it can carry substantially large electrical loads. MVA stands for Mega Volt-Amp, and it is the largest measurement when rating transformers. Transformers rated in MVA usually are the ones used by big companies with large factories.

1 MVA Three phase Pad-Mounted transformer

What Is the Difference Between a kVA Transformer and an MVA Transformer?

The main difference between kVA and MVA transformers are the electrical loads it can handle. To make things simpler, think of VA as the unit of measurement of electrical load. kVA stands for Kilo Volt-Amp and MVA MegaVolt-Amp. It takes around 1,000 kVA to equal 1 MVA.

How Do You Calculate Transformer MVA?

There is an equation that can easily calculate transformer MVA. It can be tricky to understand, but it can make things more straightforward when computing for the MVA of transformers. A couple of things are needed to calculate kVA: first is knowing the voltage and current rating.

Formula: P(KVA) = VA/1000 where P(KVA) is power in terms of KVA, V is the voltage, and A is current in terms of amperes. Divide by 1000, and you’ll get the MVA.

Another way is knowing the voltage and output resistance.

Formula: P(KVA) = (V^2/R)/1000 where R is resistance in terms of ohms. Divide by 1000, and you’ll get MVA.

You can also compute knowing power in watts and the power factor.

Formula: P (KVA) = P (watts)/pf, pf is the power supply’s power factor. Divide by 1000, and you’ll get MVA.

Why Do Transformers Hum?

Humming comes from the repeated contraction and expansion of the transformer’s metal core inside.

What Is a Tap Changer?

It is something that regulates the voltage output of a Three-phase transformer. Load variations in transformers can vary the output voltage in the Pad Mounted Transformer and that’s when the Tap Changer applies. 

What Is the Difference Between a Power Transformer and an Instrument Transformer?

Power Transformers are used to either step up or step down the voltage level, mainly in power distribution and transmission. Meanwhile, the instrument transformer is used for the current or voltage measurement in a circuit. Good examples of instrument transformers are the current and potential transformers.

Why Choose Daelim 1 mva transfomer?

Daelim is one of the best Transformers manufacturers in the world. Since the start, the company has focused on the development of higher-performance Three-phase transformer. The transformers sold by DAELIM are of high quality and low price, which can meet the basic requirements of most markets and are deeply loved by customers. As the technological developments and standards have risen throughout the years, Daelim is one of the leading innovators and pioneers for Transformer designs and quality.

1 MVA Transformers from Daelim is one of the best Transformers manufactured in the world. The rigorous quality control and maintenance are top-notch in the world’s standards. Daelim manufactures everything from insulators, conductors, arresters, circuit breakers, switches, transformers, mobile substations, and more. With Daelim’s hands-on engineers and technicians that are available all the time, you can be assured of the quality and great service, visit Daelim and contact them for any questions, queries, and quotations you will need. Daelim has been in the industry for 15 years and can produce Three-phase transformer based on multiple standards, such as ANSI/IEEE, CSA, IEC, AS/NZ, and more. Contact us now for quality products and services for all your needs!


Transformers are useful equipment that help bridge the gap between the different electrical outputs. It allows appliances from other countries to be used worldwide. It truly is one of the most valuable inventions of the modern world. 

For high-quality and durable MVA transformers, visit Daelim. The products they offer have been widely used in various industries. You sure will find a transformer that best suits your needs for a reasonable price!