Transformer 500 kVA

Electrical professionals employ a variety of components to establish an efficient and secure flow of electricity. Among these components are transformers which are vital in voltage distribution. Read on to learn how transformers play their role in an electric distribution system. This article by Daelim will be tackling everything about one voltage type of transformer, specifically, the transformer 500 kVA.


Daelim Belafic is the leading Chinese brand for electrical components and solutions. If you’re looking for quality electrical components, you can never go wrong with them. You can check out their product catalog for transformer 500 kVA and similar products.

oil immersed 2 windings 3 phase transformer

Check Details

pad mounted 500 kva 33kv transformer

Check Details

3 phase dry type transforme

Check Details

Single Phase Pad Mounted Tansformer

Check Details

Transformer 500 kVA: The Ultimate FAQ Guide

We can provide you with a variety of transformers up to 500 kVA, such as: Power Transformer, Three Phase Oil-immersed Distribution Transformer, Dry-type Transformer, Pad-Mounted Transformer, etc. With more than 15 years of experience in the design, engineering, and production of high-quality electrical products and equipment, we can provide you with a variety of standard, expert, and customized services.


Let’s find out:

Transformer 500 kVA and Its Functions

Transformer 500 kVA factory
Transformer 500 kVA factory

Transformers are essential, most especially for high voltage distribution lines. These devices are responsible for converting an alternating current from a specific voltage to a desired one. Additionally, transformers can either use “step-down” or “step-up,” a voltage output that works under the principle of magnetic induction.


Electricity is distributed to long-distance networks through high-voltage currents. However, these high-voltage currents can be hazardous and cannot be utilized for commercial or residential use. Thus, these voltages need to be "transformed" to lower consumable ratings.


The same distribution method goes with power suppliers. However, they step up the voltage to make long-distance distribution possible.


The industry measures the power capability of these components through kVA or kilovolt-ampere. Kilovolt-ampere stands for the apparent power of an electric current. In which different power requirements specify capacity ranges to perform the voltage conversion.


In this context, transformer 500 kVA means a transformer capable of handling power thresholds within the 500kVA rating. Typically, these ratings mean that the transformer can process power ratings equal to or lower than that number.

There are international standards for widely used kVA ratings for transformers. You can contact your local manufacturer for more details about the other ratings.

Common Types Of Transformer 500 kVA

We can categorize transformer 500kVA between two types: single-phase and three-phase transformers. Choosing between these two can be essential for the compatibility of components within an electrical system.


Most 500 kVA transformers are three-phased since they fall on the higher rating spectrum. However, some demands require a single-phase variant. Thus, resulting in still existing production of single-phase variants.


Aside from the type of phasing, manufacturers further break down their classification on the way they are built. Certain types of casing and structure are configured to fit the installation environment. For distinction, below are some of the key differences between the two phases and their respective application and builds.

Single-Phase Transformer

A single-phase transformer is the basic type of transformer. There are only two coils or windings necessary to convert currents. This type only includes an input and an output coil to distribute power.


A Single-phase transformer is usually recommended for residential or commercial use. However, a few designs are also capable of handling low to medium industrial demands.


Below are a few single-phase transformer variants available in the market:

1. Encapsulated

This type is common for low-rating transformers. Typical rating ranges include 50 VA to 25 kVA. Additionally, this is commonly used for general loads, including both indoor or outdoor loads. Transformers of this type can also be banked or configured to function as a three-phase alternative. Common applications span from residential to industrial utilities.

2. Ventilated

A ventilated transformer is ideal for multiple loads both indoors and outdoors. With ratings ranging from 25 t0 100 kVA, it is commonly used for residential and residential systems.

3. Full-Close, Non-Ventilated

Full-Close, Non-Ventilated transformer types are best for the “dirty” or “dusty” installation places. The full-closed casing prevents harmful substances from blocking or intercepting their functions. They rate around 25-500 kVA.

Three-Phase Transformer 500 kVA

Three-phase transformers work under a different concept of power generation. It uses a three-coil system that is spaced 120 degrees apart, which is called "Delta.” This system produces power by rotating the delta within the magnetic field. The generated output is then sent through 3 output lines. Hence, the term "three-phase" system.


A three-phase transformer 500 kVA is advised for industrial applications. The power generating system of a three-phase transformer is more efficient for long distribution lines. Thus, you can expect a more efficient power distribution in industrial applications. In which, power lines can significantly be distant than residential or commercial ones.


Furthermore, certain heavy machinery may also require a three-phase system. Some even standardize the use of such. Thus, in all accounts, a three-phase transformer 500kVA is best for industrial usage.


Similar to the single-phase variant, three-phase transformers can be categorized according to the following build:

1. Encapsulated

This type is applicable for a variety of loads, including both outdoor and indoor sources. Typical rating ranges include 3 VA to 75 kVA. Application is similar to the single-phase variant. However, most designs are capable of handling higher rating demands.


2. Ventilated

A ventilated transformer is ideal for multiple loads both indoors and outdoors with applications similar to the single-phase variant. Although, the three-phase version caters to up to extremely high ratings reaching 1,000 kVA.

3. Full-Close, Non-Ventilated

The best for more contaminated or dusty environments. The same application and design as with the single-phase variant. The rating, however, spans from higher 25 to 500 kVA.


These typical market designs and manufacturing variations are still prevalent. But many electrical component companies are innovating to meet the ever-growing demands of the industry. Thus, in doing so, plenty of designs with usually higher ratings is possible for both types of transformer.


Also, please make note that single-phase and three-phase transformers systems have different manners of kVA computation. This consideration will be vital in your load’s computation prior to determining your transformer size. You may check how to compute their respective kVAs with the computation guide in the next section of this article.

How to Determine if I Need a 500 kVA Transformer?

Before proceeding with the actual computations, it is important to be familiarized with the terms and units involved.

First, volts-amperes (VA) or kilovolts-amperes (kVA) represent the unit of the apparent power. Smaller transformer sizes use VA as a unit and are important to note to avoid confusion among purchases. Furthermore, kVA stands for the ‘apparent power’ and not the ‘real power’ of the current represented by Wattage.

Apparent power is practically the face value of rating without thresholds and losses concerned. Meanwhile, real power is the usable or drawable power from the device. Real power is typically within a fraction of the apparent power capacity.

Determining the right transformer rating is vital for both safety and power efficiency. Below rating transformers can result in conversion failure or even overheating. Meanwhile, the above rating transformer can be better but may not be cost-efficient depending on its use.

Thus, below are a few steps to use in determining what transformer size is actually needed.

How to Calculate kVA?

1. Determine the Load Voltage (Volts)

2. Check the load current (Amperes)

3. Check line voltage

4. Then verify your use, whether it is single or three phases. Below is the respective formula to use:


Single-Phase: Volts x Amps /100 = kVA


Three-Phase: Volts x Amps x 1.732 /100 = kVA


If the kVA of the load is equal to or less than 5kVA, then the transformer 500kVA fits the job. The kVA of the transformer should always be higher than the load to process current and future requirements.


Getting the right rating of the transformer allows for better power utilization. It also saves you from the risks and hassle of damage repair and faulty performance. Besides, high-quality transformer performance is necessary for any smooth distribution of electricity. It is also important to choose the right specification to meet the demands of your application.


Ultimately, the product should come from a reputable brand attested by years of experience and expertise like Daelim.


Daelim Belafic is the leading brand of transformer manufacturer in China. Backed with a decade of good field reputation, it established itself as one of the trusted electric brands worldwide. If in search of a quality transformer 500 kVA or other electrical components, look no further; Daelim has it.


Daelim Belafic is your innovative and reliable partner for electrical products and solutions.


Contact us today for further inquiries or collaboration.


DAELIM: An Electric Product & Equipment Manufacturer.