Ultimate 132kV Transformer Guide

Ultimate 132kV Transformer Guide
Ultimate 132kV Transformer Guide

This post is dedicated to the 132kv transformer. Generally speaking, transformers play a big part in electricity transmission.

As an illustration, transformers reduce and raise voltages to operate safely and transmit electricity over long distances.

Electricity has been used by humanity for countless things since its conception.

It has been an important part of everyone’s daily lives. Different establishments, businesses, and even your home are powered by electricity.

But have you ever wondered how electricity is transmitted?

Consequently, DAELIM has been dealing with manufacturing high-quality electric products and equipment for over 15 years.

DAELIM is built on multiple standards, speed service, and expert customizations, providing the industry excellence in service and equipment.

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What Is A 132kV Transformer?

By simple definition, this is a transformer with a 132kV capacity.

A 132kV transformer falls under the power or substation transformer classification.

To enumerate, a 132 kV transformer transmits electric energy from the generating station to end consumers.

In which case, the power is transferred by changing its voltage level and keeping its frequency efficient.

A transformer must step the voltage up and down to ensure efficient transmission of power.

The image from the 132kV substation single line diagram shows the incoming power is received at 132 kV from the generating station.

In that event, the voltage is stepped down to 33kV then transferred to the end consumers.

132kV substation single line diagram
132kV substation single line diagram

What Are The Equipments Used in Substation?

Every piece of equipment is a part of a bigger picture. As long as they are working properly, these will ensure the infrastructure’s safety, security, and protection.

Here are the individual parts of the 132kV substation equipment.


Battery, which is an important part of the grid, converts chemical energy into electric energy.

It works as a standby storage device that provides power in case of failure.

There are two types of batteries used in substations, such as acid-alkaline and lead-acid batteries.


Busbars are used by lines that have to be electrically connected at the same voltage.

It is made up of copper and aluminum.

A conductor connects double lines in the bus to ensure that the other line may still work when the other line is at fault.

Equipments Used in 132kV Substation (1)

Capacitor Banks

Capacitor banks are used to improve power factors in a substation.

Circuit Breakers

Circuit breakers are designed to open or close a circuit during fault or normal conditions.

The main function of a circuit breaker is to prevent further damage to other instruments when a fault occurs.

Furthermore, a circuit breaker can only be closed after the isolator is closed.

Current Transformers

A current transformer is used for the measurement of alternating high electric currents to lower electric currents.

These are also used to maintain protection and install current relays.


Insulators support and confine the current of the conductor.

Post insulators are used by busbars which can be directly bolted into the insulator cap.

On the other hand, strain insulators are used when the line is put through higher tension.


An isolator does general maintenance in a power substation.

It frequently opens a circuit in the absence of a load.

Isolator switches are only active when the line to which they are connected is not carrying any load.

Unless the circuit breakers are activated, the isolators cannot be opened.

Lightning Arrestors

A lightning arrestor is equipment used to protect the insulation in the system from the damaging effect of lightning.

Light arrestors discharge the overvoltage surges.

It is located at the starting of the substation and near the transformer terminal phase.


A relay is a protective device that detects a fault condition in a circuit.

It initiates the work of a circuit breaker to disconnect the line with an occurring defect from the rest of the working circuit lines.


Switchyard is an important part of the substation.

It is also where electricity is transferred from one voltage to another.

Moreover, this collection of various components isolates healthy lines from fault lines, thus preventing further damage.

Other Supplementary Transformers

Potential Transformers

Potential transformers are used for alternating high voltage with lowering it as well.

Additionally, it is used for the safety of the relay system and has properties that are similar to current transformers.

Instrument Transformers

Instrument transformers are used for reducing higher voltages for effective and safe usage.

Moreover, the transformers are also utilized for the protective relay in supporting potential currents.

Equipments Used in 132kV Substation (3)


Conductors are equipment in a substation that allows the flow of electrons.

It is used for transferring electric power from one line to another line in a substation.

Wave Trapper

Wave trappers are utilized for trapping high-frequency waves.

It is then placed on incoming lines and traps high-frequency waves to prevent them from disturbing the currents and voltages in a substation.

Metering and Indication Instruments

Metering and indication instruments are used for controlling and maintaining the values of voltages.

Examples of metering and indication instruments are voltmeters, ammeters. kWh meters, wattmeters , and more.

Equipment for Carrier Current

Equipment for carrier current is utilized for communication, supervisory control, relaying, and more.

You can find this equipment in the carrier room connected to high voltage circuits.

What Are The Common Types of 132kV Substation?

Substations vary, depending on the service they operate, application, operating voltage levels, and location and design.

Here are three common types of 132kV substations.

Types 132kV Transformer Substation
Types 132kV Transformer Substation

Converter Substations

Converter substations fall under a substation based on service.

In that case, it serves to convert currents from high voltage to low voltage.

Moreover, a converter can also alter direct current to alternate current and reverse.

Distribution Substations

A distribution substation falls under an application type of substation.

It consists of pieces of equipment used to transmit power from the main system to end consumers.

These currents are transmitted with safety, for it has been altered based on the load bearable by end consumers.

Transmission Substations

Transmission substations are used for transmitting power from one system to another.

Consequently, a substation may be complex or simple depending on the voltage it operates.

A simple transformer may need a bus and circuit breakers, while complex ones may need bigger equipment to work.

What Is The Safe Distance From 132kV Power Line?

The minimum approach distance for an authorized person from a 132kV power line is 1.8 meters.

An ordinary person must observe a distance of 4.5 meters.

Additionally, a mobile plant must maintain a distance of 3.0 meters and 2.9 meters for vehicles.

132kV Power Transformer

What Are The Differences Between Feeder And Distributor?

A feeder is a power line carrying the current from the secondary substation to the distribution substation.

Additionally, the current from the feeder is not tapped and stays on its voltage level.

On the other side, a distributor is a line from which the current is tapped and transmitted to end consumers.

Is It Safe To Live Near Powerlines?

There are a lot of studies regarding the potential health risk of living near powerlines.

However, these studies lack evidence of having health damages associated with living near the power line.

While studies lack evidence that living near the powerline can cause risk, scientists also lack evidence that living near the powerline is risk-free.

On a simple note, any potential health risks associated with living near the powerlines are minimal.


In brief, electrical powers are serious entities that authorized personnel, and an ordinary person must take caution and safety measures.

A higher voltage to lower voltage transmission is important and is done through different processes in every station.

A 132kv transformer is considered an essential part of delivering efficiency to varying end consumers.

Different types and designs of transformers are utilized depending on the service and application type.

DAELIM is a brand you can trust to provide you with high-quality, market-friendly, and reliable products.

At present, DAELIM has been meeting the needs of different industries and complies with international standards.

About Bin Dong

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 132 kV Transformer

If you find that the existing distribution transformer types or power cannot meet your requirements. You can choose to tell Daelim. Daelim has a team that has always had a wealth of design transformers, and can give you a specific design plan in the shortest time.

Daelim’s distribution transformers comply with IEEE, ANSI, CSA, IEC certification, and are used in North America (such as Canada, the United States, Mexico), South America (such as Ecuador, Chile), Europe (such as Spain, Lithuania) and some Asian countries. Daelim even has a professional installation team that can provide you with installation services.