In this article, PRABHA POWER will explain the key components of a 63 kVA transformer in simple and easy language. Whether you are a student, a beginner in electrical engineering, or just a curious reader — this guide is for you.
What is a 63 kVA Transformer?
"Before we go into the components, let's understand what a 63 kva transformer is and how it functions."
kVA stands for kilo-volt-ampere, which is the rating or capacity of the transformer.
A 63 kVA transformer can handle up to 63,000 volt-amperes of electrical power.
It is commonly used in residential buildings, small industries, and commercial areas where moderate power is needed.
Why Are Transformers Important?
Transformers help in changing the voltage level of electricity. They can increase the voltage (step-up) or decrease it (step-down). This is important because:
High voltage is good for transmitting electricity over long distances.
Low voltage is safe for using electricity in homes and buildings.
Main Types of 63 kVA Transformers
At PRABHA POWER, we usually manufacture two types of 63 kVA transformers:
Oil-Cooled Transformers (Distribution type)
Dry-Type Transformers
This article mainly focuses on oil-cooled distribution transformers, which are more common.
Key Components of a 63 kVA Transformer
Now let’s talk about the main parts of the transformer. Each component has a special job. Together, they make the transformer work safely and efficiently.
1. Core
The core is like the heart of the transformer.
It is made of thin laminated sheets of silicon steel.
The core provides a path for the magnetic field created when current flows through the coils.
A good core ensures low losses and high efficiency.
PRABHA POWER uses high-quality CRGO (Cold Rolled Grain Oriented) steel for making the core, which reduces energy losses.
2. Windings
Windings are the coils of wire wrapped around the core.
There are two types of windings:
Primary winding – where electricity enters the transformer.
Secondary winding – where electricity leaves the transformer.
These windings are usually made of copper or aluminum.
PRABHA POWER prefers copper windings for better conductivity and long life.
The number of turns in the coil determines the input and output voltage.
3. Tank
The tank is the outer covering of the transformer.
It holds all the internal parts, including the core, windings, and transformer oil.
It is made of steel and painted to avoid rust and weather damage.
PRABHA POWER designs transformer tanks to be leak-proof, durable, and weather-resistant.
4. Transformer Oil
The oil used in the transformer is not regular oil. It is special insulating oil.
It helps in:
Cooling the transformer.
Insulating the electrical parts.
Preventing arcing (electric sparks).
PRABHA POWER uses high-grade mineral oil, which keeps the transformer cool and safe.
5. Breather
The breather is a small device filled with silica gel.
It is connected to the conservator tank.
When the transformer breathes (air goes in and out), the breather absorbs moisture from the air.
This keeps the transformer oil dry, which is important for safety.
The silica gel in PRABHA POWER transformers changes color when it is full of moisture, helping in easy maintenance.
6. Conservator Tank
This is a small cylindrical tank fixed on top of the main tank.
It holds extra transformer oil.
When the transformer heats up, the oil expands and goes into the conservator tank.
When it cools down, the oil comes back.
This helps in managing the thermal expansion of oil and maintains pressure inside the tank.
7. Buchholz Relay
This is a safety device used in oil-filled transformers.
It detects gas formation or oil movement, which may indicate an internal fault.
If it senses a problem, it sends a warning or shuts down the transformer.
This important component is included in PRABHA POWER transformers for extra safety.
8. Radiators or Cooling Tubes
These are metal fins or tubes on the outside of the transformer.
They help in removing heat from the oil.
As oil moves through the radiator, it releases heat into the air.
Our radiators are designed for maximum cooling using natural air circulation.
9. Bushings
Bushings are insulated connectors.
They allow the connection of outside wires to the transformer’s windings.
There are HV (High Voltage) and LV (Low Voltage) bushings.
PRABHA POWER uses ceramic or epoxy bushings to avoid electrical leakage.
10. Tap Changer
This device helps in adjusting the voltage.
Sometimes, small voltage changes are needed due to load variations.
The tap changer allows switching between different tap positions on the winding.
There are two types:
Off-load tap changer – can be changed only when the transformer is off.
On-load tap changer – can be changed while the transformer is running (used in bigger units).
Our 63 kVA transformers generally come with an off-load tap changer with ±5% voltage adjustment.
11. Thermometer or Temperature Gauge
This is used to measure the oil temperature inside the transformer.
High temperature can damage the transformer.
This helps in monitoring and maintenance.
12. Pressure Relief Valve
This valve releases pressure if it gets too high inside the tank.
It prevents the transformer from bursting or getting damaged.
Safety is a top priority at PRABHA POWER. That’s why we install high-quality valves in all our transformers.
Additional Features by PRABHA POWER
At PRABHA POWER, we go beyond the basics. Here are some value-added features we provide in our 63 kVA transformers:
Eco-Friendly Oil – less pollution and longer life.
Low Noise Design – suitable for residential areas.
Compact Size – easy to install in small spaces.
Customized Voltage Ratios – as per your requirement.
IS Standards Compliance – built as per IS 1180 Part-1 standards.
Applications of 63 kVA Transformers
Here are some common places where 63 kVA transformers are used:
Housing Societies
Small Factories
Schools and Colleges
Hospitals
Shops and Malls
Commercial Buildings
Rural Electrification Projects
Maintenance Tips
To keep your 63 kVA transformer in good shape, follow these simple tips:
Check the oil level regularly.
Look for oil leaks or rust.
Clean the bushings and radiators.
Monitor temperature and load.
Replace silica gel when needed.
Schedule annual inspections.
PRABHA POWER offers after-sales service and AMC (Annual Maintenance Contracts) to make this even easier.
Conclusion
A 63 kVA transformer is a smart choice for medium-level power needs. Knowing about its components helps in better usage, troubleshooting, and maintenance. Each part — from the core and windings to the breather and tap changer — plays a vital role in performance and safety.
At PRABHA POWER, we take pride in building reliable, efficient, and long-lasting transformers using the best materials and technology.
If you're planning to buy a 63 kVA transformer, feel free to contact us for customized solutions and expert guidance.
