Ultimate Guide To 25 kV Transformer
The kilovolt (kV) specification of a transformer indicates the maximum voltage it can safely handle. In this article, we’ll dive deep into the components and capabilities of a 25 kV transformer.
Daelim is a professional 25kV transformer manufacturer. Provide a variety of 25 kV transformers: 25 kV pad mounted transformer, 25 kV single phase pole mounted transformer,25 kV small substation transformer, 25 kV oil immersed distribution transformer, and 25 kV dry type transformer. Daelim's 25 kV transformer has Ul listed. The transformer fully complies with ANSI/IEEE, CSA, AS, DOE, NEMA, GOST, EN, and other international standards.
What Is A 25 kV Transformer?
It is possible to find transformers with ratings as high as 25,000 volt-amperes, which is what a 25 kV transformer does. The voltage it alters is normally around 240 and 480 volts, though it can be changed to other ranges.
A transformer of 25 kV can be bought in either a single- or three-phase configuration. Solitary 7,620/13,200V isolated Wye is the initial voltage of a 25 kV corporate power transformer, whereas 120/240V is the supplementary voltage.
The system of 25 kV transformers is often utilized in rooftop networks for power distribution due to its pole-mounted installation requirements.
Customers whose electrical needs exceed the capacity of the distribution system can get their power via pad-mounted transformers of 25 kV.
Learn more: What is a Live Front 25kv Pad Mounted and Substation Transformer Specification?
What Are The Types Of 25 kV Transformers?
Pad-mounted transformers are power converters that are situated on a concrete pad, often in close proximity to the service point. One type of pad-mounted transformer has a capacity of 25 kV and operates in a single-phase or three-phase configuration.
Two to three wires are buried deep below to create the primary winding of a transformer that has a rating of 25 kilovolts. Secondary coils consist of one or more cables that extend from the transformer and connect to the customer's line drop.
The capacity of a 25 kV single-phase pad-mounted transformer is typically lower than that of a three-phase pad-mounted transformer because these transformers are typically used in locations where standard power is necessary for civil use, like in the case of home appliances and other similar applications. The capacity of a 25kV single pad mount transformer usually does not exceed 250kva.
The capacity of 3-phase pad mounted transformer is usually greater than 300 kVA The design structure has the characteristics of anti-tampering and easy installation. In addition to residential areas, it is also used in large quantities of solar energy, wind energy, battery energy storage, industry, digital mines, and other fields.
Learn more about Pad Mounted Transformer
25 kV Dry Transformer
Transformers of the dry variety, where the windings are constructed of copper or aluminum, have no moving parts and no insulating oil inside. It has the characteristics of fire prevention, explosion-proof, exemption, and higher safety. It is usually installed indoors. If it must be installed outdoors, it needs to be placed in a shell with a higher IP level.
The capacity of a 25 kV dry-type transformer is usually not higher than 2500kVA. According to the environment and technical requirements of the transformer, determine whether the fan is installed. DAELIM transformer factory, with advanced production equipment and professional technical teams. The maximum capacity of 25kV dry transformer has a maximum capacity of 5000kVA.
As with dry-type transformers, distribution transformers typically have a lower kilovolt (kV) potency than power transformers. But both types are effective in their designated roles.
Read more: Ultimate guide of cast resin dry type transformer
25 kV Pole Mounted Transformer
A 25 kV pole-mounted transformer is a device that is positioned on an overhead pole close to the location of service. This setup is necessary so that the 25 kV transformer secondary amps can be hardwired into the service drop supplied to establishments.
Similarly to pad-mounted transformers, a 25 kV transformer's first winding consists of two or three wires connecting the device to the grid's distribution network.
More about pole-mounted transformers: Daelim helps you to know more about pole mounted transformer
What Is A 25 kV Transformer Size?
A transformer's highest allowed size is determined by its kV and kVA rating grade. Of course, the transformer types, efficiency, impedance, and material of the transformer also affect the size of the 25 kV transformer. If you know a few numbers about your project, system, or operation, you can figure out the kV rating of the transformer size you need by plugging those numbers into a simple formula.
The weight of the 25kV 100kva single pad mounted transformer is about 750kg. The size is about 915*680*1208cm.
Learn more: Choose your DOE 2016 Energy Efficient Single Phase Pad Mounted Transformer
What Are The Dimensions Of A Transformer Capable Of 25 kV?
Depending on the maker and layout, a transformer that produces 25 kilovolts of electrical output can come in various sizes. Transformers with a 25-kilovolt output typically weigh in at 381 mm.
On the other hand, the 25 kV dimensions typically consist of the following:
- An enclosure code of 15B
- Temperature capacity of 115°C
- 508 millimeters in height
- Width: 381 millimeters
- It measures 343 millimeters deep
- Exact depth measurement: 343 millimeters
- Mounting Type: wall-mounted enclosure
- Exterior finish: stainless steel
- NEMA 3R Enclosure
- The recommended insulation temperature is 180°C
25 kV Transformer Details
When looking for 25 kV transformers, you may find various items with varying features and ratings. Here are some specifications of 25 kV transformers that might help you.
- The maximum allowed power consumption is 25 kV
- Suitable for use between 22,000 and 420 volts
- The frequency ranges between 50 and 60 hertz
- A gradual increase to 65°C in temperature
- The kind of air conditioning system you have
- Connection Type for 25 kV Transformers: Delta and Wye
- The 25 kV transformer must have insulation of either class H,180 ° C, or F,155 ° C.
- Ingress Protection Rating (IP) 00, 00, or -23 for a 25 kV
- Average Weight (in Kg) for a 25 kV Transformer
- Losses at No Load for a 25 kV Transformer are 1.2%
- The full load loss of the transformer of 25 kV is 5.5%
- 3.6% Impedance for a transformer with a 25 kV Rating
- Three-phase, 25-kilovolt-ampere transformer
- Oil Capacity for a 25 kV Transformer: 98L
Read my article on Pad Mounted Transformer CSA C227.4 National Standard of Canada
How to Determine 25 kV Transformer Load Capacity?
There are distinct computations for single or three-phase transformers centered on amperage statistics and winding power. If you want to calculate the maximum load of 25 kV transformers, the model of the transformer you are using will be a factor in this calculation.
When calculating the load capacity of a transformer with a 25 kV capacity, it is common practice to use the transformer score expressed as a percentage of the ultimate capacity that the transformer is able to support.
In many cases, the computation is based on the specifics of the Main or Secondary Winding current and amperage.
The computation provides three distinct approaches to selecting the most appropriate maximum load for the transformer. In order to determine a transformer's kV load-bearing capacity, you'll need two pieces of information:
- V stands for the voltage between the lines carrying the load.
- I, which stands for the peak phase current under full load.
- After you have determined these figures, you may use them for one of the two formulas for estimating the load-bearing capacity of the transformer, which are as follows:
- For single-phase 25 kV transformers, the formula is (V x I) / 1,000.
- On the other hand, 25 kV transformers have three phases: (Volts x Amperes x 1.732) / 1,000, where 1.7322 is the cube root of three.
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How Many Amps Can a 25 kV Transformer Handle?
The 25 kV transformer's voltage rating determines the maximum number of amps it can handle. How many amps can a transformer of 25 kV take? That's easy to find out with this formula.
Power Output at Peak Voltage = 25,000 VA
For example, the load power that a 25 kilovolt (kV) transformer can carry is 104 amps since the primary voltage of the transformer is 240 volts, and the secondary voltage output is 480 volts. In short, a 25 kV transformer can handle 480 to 280 volts.
In contrast, a 208-ampere limit is placed on a 25-kilowatt-voltage-ampere (kVA) transformer with a 480-volt main and a 240-volt second tier.
How Much Oil Does A 25 kV Transformer Require?
The oil requirements of 25 kV transformers vary, depending on the transformer's design and the kVA ratings. The greater the value of the kVA rating, the more transformer oil is required..
The oil capacity for a 25 kV 1000 kVA pad mounted transformer is typically about 1530 liters.
The best course of action is to check with your transformer manufacturer to get an accurate estimate of how much oil you will need. You might also inquire about the finest oil while you're there.
What Is The 25 kV Transformer Price?
There is no standard price for a 25 kV transformer because it depends on a variety of factors, including the brand, the style of the transformer, the capcity, the voltage, efficiency value, impedance, accessories brand, etc.
If you are in the market for 25 kV transformers, it is in your best interest to evaluate the costs offered by several manufacturers. You need to be sure that you inquire more about the warranty and the refund policy before making the purchase.
You must be aware of the specific model of the transformer 25 kV that you require. The majority of transformer manufacturers provide single-phase pad-mounted or pole-mounted 25 kV transformers at prices that are competitive in the market.
Make sure the price you pay is equivalent to the quality of the 25 kV transformer.
Try for free: Residential Transformer: The Small Green Box in the Neighborhood
Can A 25 kV Transformer Power Multiple Houses?
Several variables affect how many homes a given 25 kV transformer can power.
How much energy each home consumes depends on how many and what kinds of appliances are used there. Many air conditioners in a home will increase the electrical demand compared to a home with less equipment.
When the voltage is higher, it can only power a fraction of the maximum number of homes.
For clearer comparison, a 25 kV transformer providing 240 volts can only power half as many homes as a 120-volt transformer.
The type of wiring in houses is another factor that influences the number of households that a transformer 25kV is able to handle.
For instance, if the houses are wired up to the transformer utilizing underground cables rather than overhead lines, 25 kV transformers will only be able to serve a smaller number of residences.
In a metro area, in which the load and voltage output on every house is pretty high, a transformer with a capacity of 25 kV is capable of handling around six or seven conventional homes.
However, in rural areas, where the electricity consumption of every house is relatively modest, a transformer with a 25kV capacity may handle ten homes or more without any problems.
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Is Commercial Use of a 25 kV Transformer Possible?
As for business applications, a 25 kV transformer is fine. It is common practice for businesses and factories to employ transformers with a capacity of 750-5000kva.
A 25 kV transformer frequently supplies electricity to commercial structures, including offices, retailers, and factories. Large facilities, such as hospitals, schools, and government offices, also rely on 25 kV transformers.
If you're in the market for this type of transformer to use in a business setting, it's important to check the details and make sure it meets all of your needs.
What is the difference between 25 KV oil transformers and dry transformers?
25 kV oil transformers
Whether it is a single-phase or a three-phase 25kV oil transformer, transformer oil is used as insulation and cooling medium. Usually installed outdoors.
Whether a single phase or a three -phase 25kV dry transformer, the iron core and the winding are not impregnated with the insulation oil. The cooling method includes natural air cooling (ONAN) and forced air cooling (ONAF). Suitable for local lighting, shopping malls, docks, airports, and other places, usually installed indoors.
Read more about dry transformer
400 kVA Transformer
The capacity of the 400kva transformer is a distribution transformer. It has many types, such as dry transformer, single phase transformer, three phase transformer, pad mounted transformer, and substation transformer. You can choose 400kva transformers according to your needs
For both step-up and step-down operations in elevated transmission systems, a 400kva transformer is typically utilized. Since this device is a power transformer, the electrical power it transfers is normally of a very high voltage.
Get it now: The Basic Guide of 500kVA Transformer
Conclusion
The transformer's design, more commonly referred to as a design by requirement, determines the necessary kVA rating.
Several options exist for transformers operating in the 25 kV category. For example, if you're looking for a 25 kV transformer, it's important to compare items while keeping in mind their size.
Transformers with a 25 kV range are commonly available in pad-mounted and pole-mounted versions.25kV transformers are used for community lighting, construction sites, etc.
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