Main Transformer in Substation

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction. A varying current in one coil of the transformer produces a varying magnetic flux, which, in turn, induces a voltage across a second coil wound around the same core. Electrical energy can be transferred between the two coils without direct electrical connection between them.

A substation is a high voltage electrical installation where equipment is used to switch or transform electric power. The main transformer in a substation steps down the voltage from the transmission line to a level that can be used by distribution circuits. The secondary winding of this transformer provides the voltages required by the distribution system.

Substations are typically located at strategic points along a transmission line, such as where the line crosses a river or where it branches off in different directions. This allows for easy maintenance and repair of equipment. Substations may also be located near load centers, such as cities, to reduce transmission losses.

The main transformer in a substation plays an important role in providing power to distribution circuits. It steps down the voltage from the transmission line so that it can be used safely and efficiently by consumers.

Substations: Basic Principles | Circuit Breakers | Disconnectors | Relays | CTs & VTs | Arresters

Function of Power Transformer in Substation

A power transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction. A variety of types of transformers are used in electronic and electric power applications. Power transformers are used in substations to step up or step down voltages on transmission and distribution lines.

The primary function of a power transformer is to change the voltage level of an alternating current (AC) input signal to match the voltage required by the load. The secondary winding(s) of the transformer provides one or more output AC signals at different voltage levels from the primary winding(s). Transformers can be designed to provide either a single output (monophasic), multiple outputs (polyphasic), or split-phase outputs.

The number of windings on each side of the transformer core determines how many input and output voltages the device can provide. Power transformers typically have ratings for both capacity (measured in VA, kVA, MVA, etc.) and maximum operating voltage levels. The capacity rating specifies the maximum amount of power that can be safely transferred without damaging the transformer due to heating effects caused by resistive losses within its windings.

The maximum operating voltage is a measure of the highest permissible continuous RMS AC voltage that can be applied across any two terminals without causing dielectric breakdown of insulating materials within the transformer.

Types of Transformer Substation

A substation is a critical part of the electrical grid, providing a safe and reliable way to step down high voltage electricity from the transmission system to a lower voltage that can be used by consumers. There are three main types of substations: transformer, generator, and distribution. Transformer substations are used to change the voltage of electricity so it can be safely transported over long distances through high-voltage transmission lines.

These substations typically have large transformers that use oil or air to cool them while they convert the electricity. The two most common types of transformer substations are autotransformers and power transformers. Generator substations are connected to power plants where electricity is generated.

The generators at these facilities convert mechanical energy into electrical energy that is then fed into the grid. These substations typically have much larger transformers than those found at transformer substations since they need to handle higher voltages. Distribution substations take electricity from the transmission system and lower the voltage so it can be distributed to homes and businesses via medium-voltage distribution lines.

Substation Transformer Specification

A substation transformer is a type of electrical transformer that is used to change the voltage of an alternating current (AC) in a substation. The primary winding of the transformer is connected to the high-voltage side of the substation, while the secondary winding is connected to the low-voltage side. The substation transformer specification can be found in IEEE Standards Collection: Transformers and Reactors – IEEE Std C57.12.00™-2011.

Substation Transformer Manufacturers

As the name suggests, substation transformer manufacturers are companies that manufacture transformers for use in substations. A substation is an electrical facility where voltage is transformed from high to low or vice versa in order to distribute power. The transformer is a key component of a substation, as it helps regulate the flow of electricity.

There are a variety of different types of substation transformers, which are designed for specific applications. For example, some transformers are designed for use in outdoor environments, while others are designed for indoor use. Additionally, some transformers are designed for specific voltage levels, while others can be used with a range of voltages.

When selecting a substation transformer manufacturer, it’s important to consider factors such as the company’s experience, reputation, and capabilities. Additionally, you’ll want to make sure that the manufacturer you select can provide the type of transformer you need for your specific application.

Instrument Transformer in Substation

An instrument transformer is a device that is used to change the voltage or current in an electric circuit. It is often used in substations to change the voltage of the electricity that is being sent to homes and businesses. The most common type of instrument transformer is the power transformer, which changes the voltage of alternating current (AC) electricity.

Substation Transformer Ratings

Substation transformer ratings are the maximum capacity of a transformer to deliver electricity under certain conditions. The conditions that must be met are the maximum temperature and pressure that the transformer can withstand, as well as the minimum oil level required for proper operation. The rating is usually stamped on the nameplate of the transformer, and will look something like this: “MAX kVA 60 MVA @ 240 V”.

This means that the substation transformer can deliver up to 60,000 volts-amperes (kVA) under normal circumstances. If there is an emergency situation where higher voltages or currents are required, the transformer can safely deliver up to240,000 volts-amperes (MVA). It’s important to note that substation transformers are designed to operate within a specific range of temperatures and pressures.

If either of these two parameters goes outside of its specified range, it could lead to damage or even failure of the transformer. For this reason, it’s critical that operators monitor both temperature and pressure constantly, and take action if either one begins to approach its limit. If you’re looking for more information on substation transformer ratings, I’d recommend checking out this website:

They have a lot of great resources on different types of transformers and their capabilities.

Current Transformer in Substation

A current transformer is a type of transformer that is used to measure alternating current (AC). It is used in electrical engineering and in electronic measurement. Its primary use is to convert high currents to lower currents, so that the resulting current can be measured by devices such as ammeters.

The working principle of a current transformer is based on Faraday’s law of induction, which states that a voltage will be induced in a conductor when there is a change in the magnetic field around it. When an AC current flows through a conductor, it creates a magnetic field. This changing magnetic field induces a voltage in the conductor, which can then be measured.

Current transformers are used extensively in substations, where they are used to measure large currents flowing through high-voltage power lines. They are also used in industrial settings, such as factories and mines, where large amounts of electricity are consumed. Current transformers typically have either one primary winding or multiple secondary windings.

The number of turns on the primary winding determines the transformation ratio between the primary and secondary windings.

Main Transformer in Substation


What Type of Transformer is Used in Substation?

A substation is an electricity supply point where voltage is transformed from high to low, or the reverse. The type of transformer used in a substation depends on the application and the level of voltage required. For example, power transformers are used to step down high-voltage transmission lines to lower voltages for distribution, while instrument transformers are used to measure voltages and currents.

How Many Transformers in a Substation?

A substation is a vital part of the electrical grid. Without substations, electricity would not be able to flow from power plants to homes and businesses. Substations transform high-voltage electricity into lower voltages so that it can be used safely.

Transformers are a key component in substations. They take the high voltage electricity from the power plant and step it down to a lower voltage that can be used on the electrical grid. The number of transformers in a substation depends on the amount of power that needs to be transformed.

A small substation might have only two transformers, while a large substation could have dozens.

Does a Substation Have a Transformer?

Yes, a substation typically has one or more transformers. The transformer(s) raise or lower the voltage of the electricity to the levels needed by the customer.

What are the Three Main Parts of a Substation?

In an electric power system, a substation is a facility where voltage is transformed from high to low, or the reverse, using transformers. Substations may also be used for switching purposes, to isolate sections of a network for maintenance or repair. The three main parts of a substation are:

– The transformer(s), which change the voltage – The switchgear, which controls the flow of electricity


Transformers are one of the most important parts of a substation. The main transformer is responsible for converting high voltage from the transmission line to lower voltage that can be used by consumers. without a transformer, substations would not be able to function.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top