10kv Transformer Specification

A three-side (circle) transformer with a rated power of 110kv/35kv/10kv. Rated power 50000kvA, SFZ-three-phase three-turn oil-immersed power transformer 11-design serial number, is a low-loss energy-saving transformer, 50000/110-refers to rated capacity 50000kvA (50MvA), rated voltage 110kv 50MVA/50MVA/15MVA- capacity respectively refers to 110kv side 50000kvA 35kv side 50000kvA 10kv side 15000kvA 110kv side 8 speed regulation, 1.25% transformation 35kv side 2 gears adjustable 2.5% transformation.

Yn, yn0, d11-refers to the connection group, high-voltage side star connection, neutral point with ground knife belt lightning protection, medium voltage side star connection, star point grounded through arc suppression coil, low-voltage side is delta connection.

Pad-mounted Transformer

We can provide you single phase and three phase pad mounted transformer

Dry-type Transformer

Type:Cast resin; Rated Capacity: Up to 25MVA; Rated Voltage: Up to 36KV;

Pole Transformer

TypeCSP type Frequency: 50/60Hz; Rated Power: 5~167kva

Dry-type Transformer

Frequency: 50/60Hz Rated voltage:10kv, 20kv,30kv Rated Power: 400~2500kva

10kv Transformer Specification: The Ultimate FAQ Guide

What are the specifications and models of 10KV box type transformers?

Beijing DAELIM PAD mounted transformer in Honduras

Box-type transformers are designed in a box-type housing with traditional transformers that are small in size, light in weight, low noise, low loss, and high reliability. They are widely used in residential quarters, commercial centers, light stations, airports, factories, mines, enterprises, Hospitals, schools and other places.

The box-type transformer is not just a transformer, it is equivalent to a small substation, which is a substation and directly provides power to users.

Including high voltage room, transformer room, low voltage room; the high voltage room is the power supply side, usually 35 kV or 10 kV incoming line, including high voltage busbar, circuit breaker or fuse, voltage transformer, lightning arrester, etc., in the transformer room They are all transformers, the main equipment of the box transformer. There are Low voltage busbars, low voltage circuit breakers, metering devices, lightning arresters, etc. in the low voltage room, and lines are drawn from the low voltage busbars to supply power to users.

Oil-type transformer detail

The protection of box-type transformers is specifically designed to protect transformers. It is a high-tech power automation product developed and developed that integrates protection, monitoring, control, communication and other functions. It is an ideal electrical unit that constitutes an intelligent box-type transformer.

Oil-type Pad mounted transformer

Box-type transformers are divided into European transformer and Pad-mounted. Pad-mounted is small in size, low in load capacity, low in power supply reliability, European style is larger, load capacity and power supply reliability are stronger than American style, in my country, European style is generally used Box change.

A combined transformer (also known as: Pad-mounted transformer) is a complete set of transformer and distribution equipment that combines transformer, load switch and protection device of high-voltage power receiving part, low-voltage power distribution device, low-voltage metering system and reactive power compensation device.

Transformer Classification

1. According to the insulation and heat dissipation medium: dry-type transformers, oil-immersed transformers, of which dry-type transformers are further divided into: SCB epoxy resin cast dry-type transformers and SGB10 non-encapsulated H-class insulated dry-type transformers.

10KV Class Three Phase Epoxy-resin Dry-type Transformer

Dry-type transformer:

Transformers in which the core and windings are not immersed in insulating oil.

Comply with IEC726, GB6450, GB/T10228-1997 standards.

High Voltage(kV):6/6.3/10/10.5/11kV

Low Voltage(kV): 0.4 kV or other

Connection Symbol: Dyn11 Yyn0

Cooling Method: AN/AF

Rated Voltage: 10kV

Oil-immersed Transformer:

Use oil as a medium to dissipate heat.

The circulation of insulating oil inside the transformer transfers the heat generated by the coil to the radiator (sheet) of the transformer for heat dissipation.

Comply with IEC60076, ANSI/IEEEC57.12.20,CSAC2.1-06, CSAC2.2-06 standards.

Ranging from 2400 to 34500 volts

Rated Power(kVA): 5 ~ 75

Cooling Method: AN/AF

Type: CSP

Single Phase Overhead Completely Self Protected (CSP) Liquid filled Transformer

In terms of capacity, the current rated capacity of transformers in my country is calculated according to the R10 priority coefficient, which is calculated as a multiple of 10 to the power of 10, 50KVA, 80KVA, 100KVA, 125KVA, 160KVA, 200KVA, 250KVA, 315KVA, 400KVA, 500KVA, 630KVA , 800KVA, 1000KVA, 1250KVA, 1600KVA, 2000KVA, 2500KVA, 3150KVA, 4000KVA, 5000KVA, etc.

How to choose a 10kV distribution transformer?

Some newly built commercial and residential communities are densely built and have a large installation load. The distance between distribution transformers in the community is short. Among the line losses of the distribution network in the area, the loss of distribution transformers accounts for a larger proportion.

The newly-built community has a low occupancy rate, a lighter load and a more scattered area. The distribution projects in the community generally install distribution transformers in one step according to the planned power load, which causes serious waste.

Single Phase Transformer in Canada

In addition, the peak load in summer is lighter than the load in winter, and there will be waste every winter. The traditional way to solve this problem is to replace it with a small-capacity transformer.

For example, a 630 kVA distribution transformer is replaced with a 315 kVA distribution transformer, and the product parameters of a transformer factory are used as an example for calculation. The parameters of SC3-630/10 distribution transformer are:

P10=1 800 W, P1K=5 270 W, I1n=909.3 A; The parameters of SC3-315/10 distribution transformer are P20=1 200 W, P2K=3 150 W, I2n=454.7 A. Substituting formula (5) into I″=260.2 A.

High voltage electrical 3 Phase Transformer on concrete pole.

When the load current is less than 260.2 A, replacing the 630 kVA transformer with a 315 kVA transformer can reduce the loss of the transformer. If there are two adjacent 630 kVA distribution transformers, which are connected on the low-voltage side by a tie line, the load of the two distribution transformers will be supplied by one of them, and the other will be out of service for backup. According to formula (3), I’=375.8 A can be obtained.

If the tie line is very short, the loss of the tie line can be ignored. When the average load current of a single distribution transformer is less than 375.8 A, the above method can be used to reduce the loss of the transformer.

Suppose there are two adjacent 630 kVA distribution transformers, and compare the total losses of the two methods in the above example. If the average load current of a single distribution transformer is 200 A, and the two 315 kVA distribution transformers replace the 630 kVA distribution transformer with two 315 kVA distribution transformers, the loss of the two 315 kVA distribution transformers will be The sum is:

P2=2P20+2(I2/I22n) P2K=3619 W.

According to the latter method, a 630 kVA distribution transformer with 400 A load, its loss is: P1=P10+(I2/I21n)P1K=2820 W.

Obviously, if there are two adjacent distribution transformers, the latter method in the above example has a smaller total loss than the former method.

When the average load current of each distribution transformer is smaller, the loss reduction effect of the latter method in the above example is more significant. In practical applications, the low-voltage side tie line can be used to switch the operation mode by simply operating the low-voltage switch.

The replacement of transformers not only requires a lot of work, but also has a considerable number of spare transformers. The effect is not as good as the method of connecting wires, and it is not economically cost-effective. The tie-line method can be extended to multiple nearby transformers, and the critical load current can be obtained by simple calculations.

It is recommended to add a tie line on the low-voltage side in the design of the community distribution network. The wire diameter can be considered according to 1/3 to 1/2 of the rated load current of the distribution transformer. Flexible switching of the operating mode.

Model specification and capacity of 10KV power transformer

How to choose the capacity of the transformer?

Unclear 10KV power transformer models include S11, etc. The capacity ranges from 50 to 1250kv. In terms of power transformers, I have never heard of the popular name 360. 10/0.4kv This is the transformation ratio of a general transformer of 0.4kv, which is usually 380v.

It should be the capacity, but now there is no 360KVA capacity segment. The upper and lower are 315KVA and 400KVA respectively. It is said that 400 generally refers to the distribution transformer of S11-M-400/10.

What are the main applications of a 10kv transformer?

10kv transformers are vital in various industries. They play a crucial role in transmitting energy, ensuring that power is distributed efficiently and reliably.

Main Applications

  1. Utilities: Ensuring a consistent power supply to residential and commercial areas.
  2. Industrial Facilities: Providing energy to heavy machinery and manufacturing equipment.
  3. Renewable Power Plants: Incorporating into wind or solar power systems for energy transformation.
  4. Commercial Buildings: Utilized in managing the electrical needs of large commercial structures.
  5. Data Centers: Especially in bitcoin mining power operations, it's essential.
  6. Oil and Gas Plants: Critical for the stable operation of energy-intensive processes.
  7. Electric Vehicle Charging Stations: Used in public electric charging stations to manage the energy flow.


Understanding the 10 kva transformer specifications is essential for selecting the right product for specific applications.

Specification Details
Phase Single/Three Phase
Voltage 10kv
Frequency 50/60 Hz
Cooling Method Oil/Air Cooled
Load Capacity 10 kva transformer load capacity varies


Regular maintenance ensures that a transformer 10kv operates at optimal efficiency. More on maintenance can be found here.

Safety Considerations

Understanding the safety precautions, including whether 10 kv is dangerous, is essential to prevent accidents.


From utilities to renewable power plants, the 10kv transformer is an integral part of modern energy infrastructure. Its versatility and performance make it a preferred choice among professionals.

How do you maintain a 10kv transformer for optimal performance?


Maintaining a 10kv transformer is essential for its optimal performance. Regular upkeep helps in minimizing downtime and extending the lifespan of the transformer.

Regular Inspections

Conducting regular inspections ensures that any issues are detected early.


Keeping the transformer clean prevents overheating and enhances performance.

Monitoring Temperature

Monitoring the temperature ensures that the transformer is working within safe limits.

Oil Checks

Regular oil checks for oil-immersed transformers are vital. More information can be found here.

Load Management

Understanding the 10 kva transformer load capacity and managing it effectively prevents overloading.

Safety Precautions

Safety should never be compromised. Knowing whether 10 kv is dangerous and taking necessary precautions is crucial.

Record Keeping

Maintaining a record of all maintenance activities helps in future troubleshooting.

Professional Assistance

Hiring professionals for periodic checks ensures that the transformer is in the best condition.

Spare Parts

Keeping essential spare parts handy minimizes downtime during repairs.


With proper maintenance, a 10kv transformer can function efficiently for many years. It not only enhances performance but also ensures safety and reliability.

What are the safety precautions to take when working with a 10kv transformer?


Working with a 10kv transformer requires knowledge and caution. Following safety precautions ensures that the work environment remains risk-free.

Understand the Specifications

Knowing the 10 kva transformer specifications helps in handling it properly.

Use Proper Equipment

Using the right tools and equipment minimizes the risk of accidents.

Follow Guidelines

Compliance with international standards like ANSI, IEC, and IEEE is crucial.

Personal Protective Equipment (PPE)

Wearing appropriate PPE is essential to protect against electrical shocks.


Proper training on how to handle a transformer 10kv is necessary for safety.

Emergency Protocols

Having clear emergency protocols in place ensures quick response in case of an incident.

Regular Maintenance

Regular maintenance, as detailed here, prevents unexpected failures.

Clear Markings

Clear markings and signs help in guiding the staff about potential hazards.

Avoid Water Contact

Keeping water away from the transformer prevents short circuits.


Safety should be the top priority when working with a 10kv transformer. From understanding the specifications to following proper guidelines, every step is crucial in ensuring a safe working environment.

How does the load capacity of a 10kva transformer impact its efficiency?


The load capacity of a 10kva transformer is a critical factor that impacts its efficiency. Balancing the load ensures optimal performance.

Load Capacity

Understanding the 10 kva transformer load capacity is the starting point for efficient utilization.

Efficiency at Different Loads

A transformer's efficiency varies with the load. Here's how:

  • Full Load: Most efficient but may lead to overheating if sustained.
  • Partial Load: Reduces efficiency but is generally safer.
  • Overload: Can cause permanent damage.

Importance of Load Management

Proper load management is vital for maximizing efficiency without compromising safety.

Tools for Load Management

Using modern tools and technologies helps in continuous monitoring and management.

Impact on Lifespan

Proper load management extends the lifespan of the transformer.

Cost Implications

Efficient load management leads to energy savings and cost reduction.

Environmental Impact

Optimal load capacity usage reduces wastage and is more environmentally friendly.

Load Capacity in Different Applications

Different applications require different load capacities. For instance, in bitcoin mining, specific load management is essential.


The load capacity of a 10kva transformer plays a vital role in its efficiency. Proper understanding and management can lead to significant benefits in performance, cost savings, and environmental impact.

What is the difference between single phase and 3 phase 10kva transformers?


10kva transformers come in single phase and 3 phase variants. Understanding the difference is vital for selecting the right transformer for specific applications.

Single Phase Transformers

  • Usage: Ideal for residential and small commercial applications.
  • Simplicity: Easier

    to install and maintain.

  • Cost: Generally more affordable than 3 phase transformers.

3 Phase Transformers

  • Usage: Used in industrial applications where high power is needed.
  • Efficiency: More efficient in transmitting power.
  • Reliability: Offers better reliability and performance.

Key Differences

  • Power Delivery: 3 phase delivers power more smoothly.
  • Size and Weight: 3 phase is generally larger and heavier.
  • Cost: 3 phase is typically more expensive but offers more benefits.

Choosing the Right Transformer

Selecting between single phase and 3 phase depends on the specific requirements, budget, and other factors.


Understanding the differences between single phase and 3 phase 10kva transformers helps in making an informed decision. Both have their unique benefits and are suited for different applications.

How is the weight of a 10kva transformer determined?


The weight of a 10kva transformer is an essential factor in its handling and installation. It's determined by several components and materials used.

Core Material

The core material, usually iron or steel, contributes significantly to the weight.


Windings, made of copper or aluminum, add to the overall weight.

Cooling System

The cooling system, whether oil or air-cooled, has a bearing on the weight.


The insulation material also contributes to the overall weight.

Housing and Enclosure

The housing and enclosure add additional weight to the transformer.


Any customizations or additional features may increase the weight.


The weight of a 10kva transformer is determined by various factors, including the core material, windings, cooling system, and more. Understanding the weight is essential for proper handling and installation.

Can a 10kv transformer be used in renewable power plants?


With the growing focus on clean energy, the usage of 10kv transformers in renewable power plants is gaining prominence.

Wind Power

10kv transformers are used to step up the voltage generated by wind turbines.

Solar Power

In solar power plants, they are utilized to transform the voltage for grid connection.

Hydroelectric Power

10kv transformers play a role in hydroelectric power generation as well.

Benefits in Renewable Energy

  • Efficiency: Helps in efficient energy transformation.
  • Reliability: Ensures consistent power supply.
  • Adaptability: Can be customized for specific renewable energy applications.


  • Environmental Conditions: Renewable energy sites may present unique environmental challenges.
  • Maintenance: Regular maintenance, as outlined here, is necessary.


10kv transformers are indeed suitable for renewable power plants, providing a crucial link in clean energy generation. Their efficiency, reliability, and adaptability make them an excellent choice for this burgeoning field.

How does a 10kv to watts conversion work?


10kv to watts conversion is a common calculation in electrical engineering. Understanding this conversion helps in various applications.

Understanding the Terms

  • 10kv: Stands for 10 kilovolts, a measure of electrical potential.
  • Watts: A measure of power, equal to one joule per second.

The Conversion

The conversion from 10kv to watts requires the current (in amperes) and can be calculated using the formula:

[ P(W) = V(kV) \times I(A) \times 1000 ]

Practical Application

This conversion is essential in calculating the actual power that a 10kv transformer can handle.


The 10kv to watts conversion is a fundamental aspect of working with 10kv transformers. It helps in understanding the actual power handling capacity and is crucial for various applications.

What are the specifications and standards for 10kv power supply?


10kv power supply must comply with specific specifications and standards to ensure safety and performance.


The specifications include voltage, frequency, phase, cooling method, and more.


Compliance with international standards like ANSI, IEC, IEEE is mandatory.


Certifications like UL listing signify adherence to quality and safety norms.


Adhering to specifications and standards is essential for 10kv power supply. It ensures that the transformer meets the required quality and safety benchmarks.

Is a 10kv transformer dangerous, and how to mitigate the risks?


While a 10kv transformer is essential for various applications, it does pose certain risks. Proper handling and precautions can mitigate these risks.


  • Electrical Shocks: Can cause serious injuries.
  • Overheating: May lead to fires if not properly monitored.
  • Oil Leaks: In oil-cooled transformers, leaks can be hazardous.


  • Regular Inspections: Early detection of issues.
  • Proper Installation: Ensures safety from the beginning.
  • Compliance with Standards: Adhering to ANSI, IEC, IEEE standards.
  • Training and PPE: Ensuring staff are trained and equipped.
  • Emergency Protocols: Having clear procedures for emergencies.


Though a 10kv transformer comes with risks, proper handling and safety precautions can mitigate these risks. Attention to details and adherence to guidelines ensure a safe working environment.

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Hello, I am Bin, General manager of Daelim which is a leading transformer manufacturer. If you have problems when you are looking for the equipment, what you need to do is tell us.

Custom 10kv Transformers

When you need to find more than just existing transformers, Daelim’s Transformer Service Center can help you design and produce distribution transformers that meet your unique needs.

We have our own factory and a professional team of engineers, which can design and modify application requirements that meet all your conditions.

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