There are different varieties of transformers in the market right now that serve different purposes. From dry-type to oil-type, the options for what kind of transformer you use in your facility are aplenty.
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But when it comes to oil-type transformers, there are some key things you need to know before deciding whether or not they're the right choice for you. Oil-type transformers differ from other variants as they rely on oil to fulfill an important role in their overall functioning and longevity.
At Daelim, we're transformer experts and here to help you make the best decision for your facility. But, just like our drive to provide the best quality transformers, we also want to spread nothing but the most accurate information about them.
This article will discuss everything you need to know about oil-type transformers. To help you better understand oil-type transformers, we've compiled a list of answers to some of the most frequently asked questions about them.
Table of contents 1. What is an Oil Type Transformer?An oil-type transformer is a kind of transformer that uses oil as a cooling and insulating medium. The core and coils of an oil-type transformer are immersed in oil, which helps to cool the transformer and provides insulation.
Oil-type transformers circulate through ducts in the coils and around the core assembly. The movement of oil is caused by convection generated by the heat produced by the transformer.
Oil-type transformers are widely used in power distribution and electrical substations because they cool the transformer efficiently. Additionally, oil-type transformers have a longer lifespan than other transformers and require less maintenance.
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You should consider getting an oil-type transformer if you fall under one of the following categories:
An oil transformer offers a lot of advantages that make it an enticing option when it comes to selecting a transformer. But at the same time, it also has its fair share of disadvantages that outweigh the pros and cons of using an oil-cooled transformer.
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Knowing and understanding the advantages and disadvantages is important before deciding whether to use an oil-cooled transformer. That way, you can make an informed decision that is best for your needs and requirements. With that said, here are the advantages and disadvantages of using an oil-cooled transformer:
As the name implies, oil-cooled transformers use insulating oil to cool the transformer. The oil in oil-cooled transformers effectively cools the transformer because it has a high heat capacity. This means that the oil can absorb a large amount of heat before it gets hotter.
The oil used in oil-cooled transformers also has a high thermal conductivity. As a result, the oil can efficiently transfer heat from the transformer to the surrounding air. These two properties make oil an effective and efficient cooling agent for transformers.
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Oil-cooled transformers are also safe and reliable to use. This is because the oil used in these transformers is non-flammable and has a high flash point. This means that the oil will not catch fire easily and is less likely to cause an explosion.
In addition, oil-cooled transformers are also less likely to fail than other types of transformers. This is because the oil used in these transformers acts as a shock absorber that cushions the components of the transformer in case of an electrical fault.
Another advantage of using an oil-cooled transformer is its long lifespan. This is because the oil used in these transformers acts as a lubricant that reduces friction between the moving parts of the transformer.
The oil also protects the transformer from corrosion and rust. This means oil-cooled transformers are less likely to experience premature failure due to corrosion or rust.
Oil-cooled transformers, especially the ones manufactured by Daelim, are also durable and can withstand a lot of wear and tear. This is because the oil used in these transformers acts as a sealant that prevents water and other contaminants from entering the transformer.
The oil used in oil-cooled transformers also has a high viscosity. This means that the oil will not leak easily from the transformer. That way, you can be sure that your transformer will not develop any leaks even after years of use.
Oil-cooled transformers are also the best option for high-voltage applications. This is because the oil used in these transformers can withstand high voltages without breaking down.
Oil-cooled transformers are also less likely to experience a dielectric breakdown. This means that these transformers can safely handle high voltage without the risk of failure. As a result, oil-cooled transformers are the preferred choice for high-voltage applications.
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One of the main disadvantages of using an oil-filled transformer is its high initial cost. This is because oil-cooled transformers are more complex and require more materials than other transformers.
Oil Type Transformer needs to have oil-removing pits and accident oil pools when installing. When a fuel injection or explosion occurs, the oil of the transformer will be unloaded to the oil-removing pit and then flows to the accident oil pool. Avoid greater losses due to the spread of transformer explosion fires.
As a result, oil-cooled transformers are more expensive to manufacture. However, their long lifespan and durability offset the high initial cost of oil-cooled transformers.
Another disadvantage of using an oil-cooled transformer is that it requires regular maintenance. This is because the oil used in these transformers needs to be replaced regularly.
Oil-cooled transformers also need to be cleaned regularly to prevent the build-up of dirt and debris. As a result, oil-cooled transformers require more maintenance than other transformers.
Since oil is the main cooling agent used in oil-cooled transformers, these transformers are highly flammable. If an oil-filled power transformer catches fire, it can cause much damage. That's why oil-cooled transformers need to be installed in areas where there is no risk of fire.
That said, oil-cooled transformers are equipped with safety features that prevent them from catching fire easily. So, you don't need to worry about the safety of oil-cooled transformers as long as they are installed and used correctly.
Another disadvantage of using an oil-cooled transformer is that it creates a dirty environment. This is because the oil used in these transformers can leak and cause contamination. That's why this type of transformer requires high maintenance.
Oil-cooled transformers also produce a lot of heat when they are in use. As a result, oil-cooled transformers can make the environment around them very hot and uncomfortable.
Daelim Transformer can provide environmentally friendly vegetable oil as transformer oil. Plant oil has environmental protection, fire prevention, and high characteristics. Therefore, you don't have to worry about the environmental pollution problem caused by the transformer.
Read my article on: What is the difference between mineral oil and vegetable oil？
Because they can easily catch fire and produce a lot of heat, oil-cooled transformers are unsuitable for indoor use. That's why these transformers are mostly used in industrial applications.
If you need to use an oil-cooled transformer indoors, ensure the area is well-ventilated and there is no fire risk. That way, you can use an oil-cooled transformer safely indoors.
Oil-cooled transformers are mostly used in industrial applications. This is because these transformers can handle high voltages and don't require much maintenance.
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That said, oil-cooled transformers are also used in commercial applications. This is because oil-cooled transformers are more durable than other types of transformers and can last for a long time.
Oil-cooled transformers are mostly used in power plants(Including renewable energy). This is because oil-cooled transformers can handle high voltages and don't require much maintenance.
Examples of industrial sectors that benefit from using oil-cooled transformers are the following:
An oil-type transformer consists of the following parts:
The core of an oil-type transformer is made of high-quality steel. The steel used in the core of an oil-type transformer is different from the steel used in other types of transformers.
The steel used in an oil-type transformer's core is designed to resist magnetic fields. That's why the core of an oil-type transformer is made of high-quality steel.
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The coils of an oil-type transformer are made of copper or aluminum. The coils are responsible for generating the magnetic field used to transform the voltage.
An oil-type transformer's coils and core are covered with insulating materials. The insulating materials used in oil-type transformers differ from those used in other types of transformers.
The insulating materials used in oil-type transformers are designed to resist heat. That's why these materials are used in oil-type transformers.
The oil used in oil-type transformers differs from the oil used in other transformers. In addition, the oil used in oil-type transformers is designed to be resistant to heat.
The oil used in oil-type transformers is also designed to be a good insulator. That's why oil used in oil-type transformers differs from the oil used in other transformers.
The tank of an oil-type transformer is made of high-quality steel. The tank is responsible for holding the transformer oil.
The tank of an oil-type transformer also has a cooling system. The cooling system is used to cool the transformer oil.
The tap changer is used to change the voltage of an oil-type transformer. The tap changer is located on the side of the tank.
The tap changer is used to change the voltage of an oil-type transformer. The tap changer is located on the side of the tank.
Daelim can provide on-load tap and no-load tap Changer. According to customer needs, Chinese brands with price advantages can also be provided, and brands such as MR, and Qualitrol with international visibility can be provided.
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The bushings are used to connect the transformer to the power supply. Generally, the bushings are located on the top of the tank.
However, for the Oil Type Transformer designed and produced by Daelim, bushings can be top or side, specifically according to your use scenario and project. Bushings' sealing is very good to prevent oil leakage.
The ventilation system is used to cool the transformer oil. The ventilation system is located on the side of the transformer.
The ventilation system is used to cool the transformer oil. The ventilation system is located on the side of the transformer.
If you notice oil on the ground near your transformer, it could be a sign that your transformer is leaking oil. You should consider checking the level of oil in your transformer's tank.
If the oil level in your transformer's tank is low, it could be another sign that your transformer is leaking oil. Consider checking the condition of the oil in your transformer's tank.
If the oil in your transformer's tank is dark or cloudy, it could be another indication of a potential oil leak.
Dry-type transformers use air to cool the transformer. Oil-type transformers use oil to cool the transformer.
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Oxidation is a common problem with transformer oil. That's why it's important to regularly change the oil in your transformer. The frequency of oil changes will depend on your transformer type.
For instance, a 132kV oil-cooled transformer will require an oil change yearly. On the other hand, oil-cooled transformers that are lower than 132kV require an oil change once every two years. For transformers above 132kV, the oil should be changed in a 2-year interval.
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It's also important to note that the frequency of oil changes will depend on the operating conditions of the transformer. For example, if the transformer is operated at higher temperatures, the oil will degrade faster and must be changed more often.
Now that you know everything there is to know about oil-type transformers, you can make an informed decision about whether or not this type of transformer is right for your needs. If you have any further questions about oil-type transformers, contact Daelim right away.
Transformers come in a wide range of sizes and ratings, and the specific requirements of the application will determine the appropriate size and rating for a particular transformer. It is important to choose a transformer that is specifically designed and rated for the required voltage, current, power, frequency, and temperature levels.
Daelim is a supplier that can provide transformers of any size and rating. Meets all international standards and provides complete ul listings. The fast delivery period of 4-8 weeks and the professional local after-sales installation team will make you feel more secure and confident when purchasing transformers.
Table of contents 1. What affects the sizes and ratings of the transformer?8. How Is a Transformer Sized and Rated?
9. What Size Transformer Do I Need?
10. 100 kVA Transformer Load Capacity
11. How Do I Know Which Transformer to Use?
12. Why is Transformer Rating in kVA?
13. Why kVA Is Used Instead of kW?
14. What Is the Difference Between kVA and kV?
15. Why should you buy Daelim Transformer?
Transformers come in a wide range of sizes and ratings, depending on the specific requirements of the application. The size and rating of a transformer are determined by several factors, including:
Voltage:
The voltage rating of a transformer is the maximum voltage that it can handle without being damaged. Transformers are rated for high-voltage (HV), medium-voltage (MV), or low-voltage (LV) applications, depending on the voltage levels involved.
The current rating of a transformer is the maximum current that it can handle without overheating or being damaged.
The power rating of a transformer is the maximum amount of power that it can handle. It is usually expressed in kilovolt-amperes (kVA) or megavolt-amperes (MVA).
The frequency rating of a transformer is the range of frequencies that it can handle. Most transformers are designed for use at 50 or 60 Hz, but some specialized transformers can handle higher or lower frequencies.
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The temperature rating of a transformer is the maximum temperature that it can handle without being damaged. This is important for transformers that are used in hot environments or that generate a lot of heat during operation.
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It is essential to know the correct size of the transformer before you buy one. The size of the transformer determines its capacity and voltage. The voltage provided by a transformer is determined by its power rating, which indicates how much current it can supply at a given amperage. It's best to buy your transformer from an electric supplier if you are sure about your purchase because they usually carry varied sizes for you to choose from based on your requirements.
Electrical transformer ratings are used to specify the electrical power output of an electric transformer. The three most common specifications are:
• Input Voltage - This is the voltage input to the primary winding of an electrical transformer. Transformers with rated input voltages can be used with a wide range of voltages and power levels.
• Output Voltage - This is the voltage out of the secondary winding, over and above that which is supplied from the primary winding.
• Transformer Power Rating - This specifies how much watts flow through a given size, shape, number, and physical location on a typical transformer's device, or in other words how much energy it will consume at a certain load (e.g., an AC mains supply).
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In the engineering world, transformers come in a variety of sizes. There are three different types: 3-phase, 4-phase, and 6-phase. This tutorial is designed to assist you in choosing the right size transformer for your application by giving you an understanding of how each type works.
The size of a three-phase transformer refers to its capacity to handle power, typically measured in kilovolt-amperes (kVA). The size of a three-phase transformer is determined based on the load requirements of the electrical system it is serving. Larger transformers can handle more power, while smaller transformers are used for lower-power applications. The exact size of a three-phase transformer will depend on various factors such as voltage levels, current levels, frequency, and efficiency requirements.
Smaller transformers typically require more current while larger ones need less power to operate as they have more insulation and bigger windings. There are also some differences in cost related to size although this can be easily mitigated by selecting compatible components when building a power supply or integrating it into an existing one.
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Here are some formulas that can be used to calculate various parameters of a three-phase transformer:
P = √3 × V × I × pf, where
V is the voltage,
I is the current,
pf is the power factor.
Voltage regulation = (No-load voltage - Full-load voltage) / Full-load voltage, where
No-load voltage is the voltage measured on the secondary side with no load,
Full-load voltage is the voltage measured on the secondary side under full load.
Efficiency = Output power / Input power, where
Output power is the power delivered to the load,
Input power is the power supplied to the transformer from the source.
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Impedance = √(R² + X²), where
R is the resistance,
X is the reactance.
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Isc = √3 × V × 1 / Z, where
V is the voltage,
Z is the impedance.
These are just a few examples of the formulas that can be used to calculate various parameters of a three-phase transformer. Keep in mind that the accuracy of the results depends on the accuracy of the input data used in the calculations.
KVA is the maximum power rating for this transformer. The I and V ratings are specified in VA, which is not an abbreviation for volts, but rather it stands for Volt Amps. A VA rating is equal to V/1A, so if you have a VA transformer it would be rated at /V or 3,000volts of current. The typical voltage rating for this type of transformer would be - volts (in other words 10k-20k or even more).
The typical current rating for this type of transformer would be 1 - 2.5A. The reason you want a high current is that a high current will generate more heat when it's in use, thus the efficiency of the transformer is kept at 100% efficiency. A lower current would mean lower power and less heat, which translates to less efficient energy usage resulting in reduced life expectancy of your expensive and heavy-duty kVA transformer.
Usually, transformers are used to handle high voltages and currents that are made by generators. They come in various types but the most popular ones are toroidal transformers and laminated core transformers.
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The standard sizes of transformers vary depending on the voltage levels, power handling capacity, and application. Some common sizes for distribution transformers are:
5 kVA, 7.5 kVA, 15 kVA, 20 kVA
30 kVA, 45 kVA, 75 kVA, 112.5 kVA, 150 kVA, 225 kVA, 300 kVA
500 kVA, 750 kVA, kVA, kVA, kVA, kVA, kVA, kVA, 10,000 kVA
These are just some examples of standard transformer sizes. Keep in mind that the actual size of a transformer will depend on the specific requirements of the electrical system it is serving. Transformers can also be custom-designed to meet specific requirements.
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A transformer is sized and rated based on the load requirements of the electrical system it is serving. The following are some of the factors that are considered when sizing and rating a transformer:
Load demand: The size of the transformer is determined by the amount of power that is needed to supply the load. The load demand is calculated based on the current requirements of the equipment and the voltage level at which it operates.
Voltage levels: The voltage levels of the electrical system are also considered when sizing a transformer. The primary and secondary winding voltages of the transformer must match the voltage levels of the electrical system.
Power factor: The power factor of the electrical system is also taken into account when sizing a transformer. A low power factor results in a larger current demand, and therefore, a larger transformer may be required.
Efficiency: The efficiency of the transformer is also a consideration when sizing it. Transformers with higher efficiencies are typically larger and more expensive.
Overload capacity: The transformer must be able to handle short-term overloads without damaging the windings or insulation. The overload capacity of the transformer is determined based on the expected load requirements and the duty cycle of the electrical system.
Once the size of the transformer is determined, it is rated based on its capacity to handle power. The rating is typically expressed in kilovolt-amperes (kVA) and indicates the maximum amount of power the transformer can handle without exceeding its temperature and insulation limits.
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The size of the transformer you need depends on the load requirements of your electrical system. Here are the steps you can follow to determine the size of the transformer you need:
Determine the load demand: Calculate the total current demand of the equipment you will be powering. This can be done by adding up the current ratings of each piece of equipment and taking into account the expected duty cycle of the equipment.
Consider voltage levels: Make sure the voltage levels of the electrical system match the voltage levels of the transformer. The primary and secondary winding voltages of the transformer must match the voltage levels of the electrical system.
A 100 kVA transformer is rated to handle a maximum power output of 100 kilovolt-amperes. This rating indicates the maximum power the transformer can handle without exceeding its temperature and insulation limits. The actual load capacity of the transformer will depend on the voltage levels, power factor, and efficiency of the electrical system it is serving. Keep in mind that the load capacity of a transformer should not be exceeded, as this can result in overheating and damage to the transformer's windings and insulation. It's always recommended to choose a transformer with a slightly higher rating than the actual load demand to allow for future expansion or fluctuations in load.
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To determine which electrical transformer to use, you need to consider several factors, including:
Consulting with an electrical engineer or a specialist in your specific application can help you make the best choice for your particular requirements.
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The power rating of a transformer is usually expressed in kVA (kilovolt-amperes), because kVA is a measure of apparent power, which is the product of the voltage and current in an AC system. Apparent power is a useful measure of the capacity of a transformer because it takes into account the voltage and current required to operate a device or system.
When designing or selecting a transformer, it is important to ensure that the apparent power rating is sufficient to meet the demands of the system being powered. A transformer with a higher kVA rating can handle a larger load, but it may also be larger, heavier, and more expensive than a transformer with a lower kVA rating.
Expressing the power rating in kVA helps to ensure that the transformer is matched to the load requirements and helps to prevent overloading and failure of the transformer and connected equipment.
KVA (kilovolt-amperes) is used instead of kW (kilowatts) as the power rating of a transformer because KVA is a measure of apparent power, which is the product of the voltage and current in an AC system. Apparent power is a useful measure of the capacity of a transformer because it takes into account both the voltage and current required to operate a device or system.
In contrast, kW is a measure of real power, which is the power that is actually used by the load. Real power is the portion of apparent power that is converted into useful work, and it is lower than apparent power because of losses in the system, such as resistance, inductance, and capacitance.
By expressing the power rating in kVA, the transformer's capacity to handle the current and voltage requirements of the system is accurately represented. This helps to ensure that the transformer is properly matched to the load requirements and helps to prevent overloading and failure of the transformer and connected equipment.
kVA (kilovolt-amperes) and kV (kilovolts) are different units of electrical measurement used in power systems.
kVA is a unit of apparent power, which is the product of the voltage and current in an AC system. Apparent power represents the total power that is required to operate a device or system, and it is an important measure of the capacity of a transformer or generator.
kV, on the other hand, is a unit of voltage, which is the electrical potential difference between two points in a circuit. Voltage is a measure of the electrical energy that drives the flow of current in a circuit.
kVA is a measure of the capacity of a power system to handle the voltage and current requirements of a load, while kV is a measure of the electrical potential difference in a circuit.
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Quality
Daelim is a well-known brand in the transformer industry and is known for its high-quality products. Transformer with UL/cUL, CSA certificates.
Daelim transformers are designed and manufactured with reliable components and materials, ensuring consistent and reliable performance.
Daelim offers a wide range of transformers, including custom-designed units to meet specific requirements.
Daelim provides comprehensive technical support and customer service to assist customers with their transformer needs.
Daelim transformers are competitively priced, offering good value for money.
Daelim transformers come with a warranty, which provides added peace of mind.
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