The Ultimate Guide to 4-16 MVA Transformers
Throughout the guide, we provide specific examples and explanations for various MVA ratings, ranging from 4MVA to 16MVA. By understanding these power ratings, readers can make informed decisions when selecting transformers that meet their specific power needs.
As a qualified distributor of transformers, Daelim ensures the highest quality products in the 4MVA to 16MVA range. With their expertise and an industry-leading reputation, Daelim offers reliable solutions for your electrical power requirements.
What Is MVA?
MVA, which stands for mega volt-amperes, is the term for the power rating of 1000000 volt-amps. It's similar to determining a system's capability. The capacity of any electrical device is usually expressed as V x A, where V is the operating voltage and A is the current drawn. K and M stand for a thousand and a million, respectively.
What Is MVA In A Transformer?
In most cases, the rating of a transformer is generally determined by the combination of the transformer's actual power and its expected power factor.The rated capacity unit of the larger transformer is usually expressed in MVA, 1 MVA=1000 kVA.
However, the true limitations are temperature and will be proportionate to the current amps.
When it comes to power transformers, it is essential to have a solid understanding of the mechanical equivalent power that may be obtained from either source.
The ratings for generators and transformers include the following parameters:
- working voltage
- maximum rated current
- power factor
- kilowatts
- megawatts
Active and reactive power are both necessary for the load to function properly.
Both sources of electricity are essentially applied to the load at this time.
A load's apparent power is the entire amount of power that it uses, which accounts for both the load's active and reactive components.
Due to the fact that the load requires visible power, the rating of the transformer must often be stated in MVA and kVA.
Reading more: How to purchase a 10 MVA substation transformer?
How do you want to determine the rated power of a transformer?
You will need to be familiar with a few different things if you want to determine the power rating of a transformer.
1. The voltage of the power source
2. The current of the power source
3. The voltage loss in the transformer
How Should One Determine the MVA Rating of a Transformer?
Multiplying the main current measured in amperes by the primary voltage measured in volts is the first step in calculating the mega volt-ampere.
Then the resulting number is then divided by 1,000,000.
To get an accurate estimate of the S(MVA), the formula that should primarily be used is as follows:
V x I over 1000000 = V x I over 1000000 @ S (MVA)
In this case, the primary voltage of 400000 V, and its secondary current of 100 Amps.
Use our equation:
S(kVA): 40 MVA = 400000 x 100 / 1000000
This results in a rating of 40 MVA for the transformer.
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What Is The Meaning When We Say MVA Load Requirement?
MVA stands for "apparent power," which is what we mean when we use the term.
Whereas active power is often what users care about in electrical devices, devices like transformers and alternators cannot be usually rated in this way.
This is so because of the nature of their operation and the specifics of their intended use.
For this reason, magnetic power conversions devices like transformers and alternators are regularly measured in megavolt-amperes (MVA) or kVA rather than watts.
So these devices can theoretically produce zero watts while also being generally overloaded.
What Is A Load In A Transformer?
Voltage and current levels are usually transformed from the primary (input) to the secondary (output) sides of the transformer.
A source of power is mainly linked to the primary side. The secondary can be also used to link any device or appliance.
Given that in each circuit, the "load" is the component that links to the supply that consumes power, this apparatus is the load.
This secondary load is usually powered by the voltage provided by the secondary terminals.
Depending on the turns ratio, this load is basically expressed by a current at the primary terminals.
The primary will have an "equivalent load" after this.
This is the load that must be always connected to the mains' "primary" terminals to avoid a transformer's loss of power.
From the perspective of the primary circuit, this is the load's equivalent resistance.
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What are the MVA Transformer Ratings?
As was already mentioned, MVA ratings do not always have to be the same across single-phase and three-phase transformers.
Single Phase MVA Transformers
The most common transformer type in both homes and businesses is the single-phase transformer.
We can calculate using a mathematical formula like this one:
P is equal to V multiplied by I
Where V = Voltage
Where I = Pri/Sec Current
Where: P = Active Amps
Three-Phase MVA Transformers
Three-phase MVA transformers each have their unique collection of windings. These windings make up the transformer.
High-power industrial loads that utilize these components include inverters, power systems, power transmissions, and electrical infrastructure stations.
P = 3 x V x I
V = Voltage
P = Transformer power
I = Current
√3 = 1.732
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What Is A Power Rated 4 MVA Transformer?
The 4 MVA transformer is a general-purpose transformer that may be generally wired to any electrical or electronic circuit between the generator and the main distribution lines.
Equivalent to kVA Power:
4MVA=4000kVA
Pad-mounted transformers, often known as 4MVA or 4000 kVA transformers, are usually used to provide power from the ground up.
These 4000 kVA pad mount transformers may be safely placed in a steel box on a concrete platform. The 4MV transformer is widely used by utility providers.
Every wooden or concrete utility pole may accommodate a 4MVA pole-mounted transformer.
What Is A Power Rated 6 MVA Transformer?
The 6 MVA transformer plays an important role in the distribution and transmission of electricity.
In most cases, the 6 MVA transformer market has expanded to include both dry-type and liquid-filled options. The oil capacity of a 6 MVA transformer is usually based on the transformer's rated power, voltage, and operating temperature.
Equivalent to kVA Power:
6MVA=6000kVA
Everything from generator parts to distribution parts may be primarily found in a 6 MVA transformer.
A transformer with a 6 MVA rating might have its current capacity increased too much over 1-kilovolt amperes.
Additionally, currents of up to around 1500 kV are safe for the 6 MVA transformer to manage.
The output voltage of a 6 MVA transformer can go as high as 36 kV, however, most commonly it falls in the 800-10,000 kVA range.
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What Is A Power Rated 7 MVA Transformer?
A 7 MVA transformer oil-immersed mode rating has a rated power of 7000 kVA.
The primary winding of this transformer can handle 33 kilovolts of electricity, while the secondary can handle 0.240-13.8 kilovolts.
Equivalent to kVA Power:
7MVA=7000kVA
A 7 MVA transformer is mainly used to transfer alternating current (AC) power from one circuit to another while maintaining the original frequency.
The voltage output of the 7 MVA transformer is set and fixed, whereas that of the 8/10 MVA transformer may be typically adjusted to meet the needs of the user.
What Is A Power Rated 12 MVA Transformer?
The power transformer has a rating of 12 MVA, which is comparable to a rating of 12000 kVA.
This can be a step-down and step-up transformer with a primary voltage of 35 kilovolts and a secondary voltage of 11 kilovolts. Other voltage levels are also available.
Adjustments to the voltage that is primarily generated by the transformer may be made with relative ease. This is mainly because of the component known as an on-load tap changer.
Equivalent to kVA Power:
12MVA=12000kVA
A transformer that has a rating of 12 MVA could have a little difference in its weight because its design and cooling system might have some room for improvement.
Although a dry-type transformer is often smaller than a liquid-immersed transformer, this is not always the case and there are exceptions to the rule.
What Is A Power Rated 12.5 MVA Transformer?
This transformer has a power rating of 12500 kVA while having a capacity of 12.5 MVA.
The length can be anywhere from 12 to 20 feet, the width anywhere from 10 to 14 feet, and the height anywhere from 10 to 16 feet.
But these proportions are subject to change depending on the exact design and cooling system that is generally utilized.
Equivalent to KV Power:
12MVA=12000kVA
While choosing a 12.5 MVA transformer, it is essential to take into account the needs for both the available space and transportation, as well as any local legislation that may affect the installation of the transformer.
In 2019, Daelim exported a power transformer of 69/ 13.8kV-10/ 12.5MVA to Ecuador. The transformer capacity of self-cooling is 10MVA, and the capacity can reach 12.5MVA after the fan is turned on.
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What Is A Power Rated 15 MVA Transformer?
The 15 MVA transformer features an ONAN cooling system and is a three-phase, 66/11KV step-down power transformer.
Its core type is often designed for use in outdoor applications.
Equivalent to KV Power:
15MVA=15000kVA
The length and width of a 15 MVA transformer are respectively 5800 and 5500 millimeters.
The primary bushing termination may reach a height of up to 4,000 millimeters in height.
On the top plate, you will discover a marking that indicates where the center line of the transformer is usually located.
While this particular kind of transformer is operating at its full rated kVA, the temperature rise must not go beyond the following values as a percentage increase over the temperature of the surrounding environment.
Learn more about 15 MVA Transformer
What Is A Power Rated 16 MVA Transformer?
The step-down power transformer with 16 MVA capacity is a three-phase device that operates at 66/11kV and incorporates an ONAN cooling system.
Its primary uses apply to the distribution and oil-immersed transformers, both of which have requirements ranging from 6300kVA to 63000kVA (110KV).
Equivalent to KV Power:
16MVA=16000kVA
The core materials are generally constructed of silicon steel, and it has an impedance Voltage of 4%.
It possesses the benefits of Low partial discharge, low noise, and low loss all contribute to this.
16 MVA transformers also have exceptional resistance to electrical short circuits and a high level of protection against the effects of lightning.
Its excellent moisture resistance enables operation at a relative humidity of 100%.
Where Are Ratings MVA Used? What Is Their Importance?
In the electrical power business, the output or capacity of power generators, power stations, substations, and power transmission and distribution networks are generally expressed in MVA (MegaVolt-Amperes).
Simply put, the megavolt-ampere known as MVA is the unit of measurement for apparent power.
In this case, the vector sum of actual power and reactive power.
Ratings in MVA are useful because they give a standardized method of describing the power output or capacity of electrical power equipment, allowing for direct comparison between various pieces of machinery.
They are also mainly used in planning and designing electrical infrastructure and calculating load power needs.
Ratings in MVA are also frequently used to establish transmission and distribution rates, as well as for power trading on wholesale energy exchanges.
4 MVA to 16 MVA Transformers Manufacturer
Whether you need a pad-mounted transformer or a small substation transformer, Daelim can provide it with UL.
Choose DAELIM as your manufacturer if you're looking for 4 MVA to 16MVA transformers.
We ensure to provide you with the best high-quality product of transformers.
