Posted by messungelectricalengineering on October 25th, 2021

\'Busbar\' is the tried and tested technology that has transformed the world of electric power distribution. The electrical busbar is proven to make complex power distributioneasier, safer and more flexible.

Today, electrical busbar systems are the backbone of most power applications. Let\'s find out more about busbar technology.


As per Wikipedia, busbar means a metallic strip or bar, typically housed inside switchgear, panel boards, and busway enclosures for local high current power distribution.

Electrical busbar has also been defined as a type of electrical junction in which incoming and outgoing electrical current meet. It is available in different shapes but the rectangular busbar is the most commonly used one. Busbars can be fully enclosed or with a continuous access open channel.

Also known as busbar trunking system, the busbar system both grounds and conducts electricity with greater ease and flexibility than other forms of distribution. The material generally used for busbar is copper, however brass or aluminum are also used.

Copper busbar is usually chosen for its resilience to higher temperatures which provides extra security during short circuits. The metal copper also offers higher performance in clamped joints, high recovery value, lower coefficient of linear expansion and durability.

The copper busbar current carrying capacity is 1.2 times its product of width and the thickness. Which means, take a copper bus bar of 100 mm width and 10 mm thickness, the area of the copper bus bar is 10 * 100 The total current carrying capacity of the busbar is 1.2 * area => 1000* 1.2 =1200 Amps.


Based on their construction, busbars are categorized as follows:

Single busbar system

This is a simple arrangement with only one busbar along with the switch. All the substation equipment like the transformer, generator, the feeder is connected to this bus bar. Advantages of the single busbar system include:

-         low initial cost

-         less maintenance

-         simple operation

Double busbar system

In these busbar panels, low voltage and high voltage busbars are duplicated - either section can be used as desired. The arrangement requires two circuit breakers,and a coupling switch that helps transfer operation from one busbar to the other.

This type of system provides maximum reliability in supply. Maintenance or faults do not disturb the continuity as the load is simply transferred from one bus to the other.

Due to its high cost, double busbar system is rarely the preferred busbar in substation.
Ring busbar system

In this type of busbar, the end of the busbar is connected back to the starting point of the bus to form a ring. This arrangement provides two parallel paths for the circuit, hence a fault or failure of one path will not interrupting power supply completely. Maintenance of the circuit breakers is possible without interruption of service.


When space is limited or alternative electrical distribution is involved, busbar application is recommended as they offer a suitable solution for many industries and applications.

3-phase busbar panels are found in environments that require three-phase power distribution systems, such as:

  • Factories
  • Data centres
  • Retail facilities
  • Laboratories
  • Hospitals
  • Universities

Busbar systems are also widely used in

  • Telephone exchange systems
  • Cellular communication systems
  • Base stations
  • Large network equipment
  • Power generation
  • Power switch

and also in:

-         Switching cabinets

  • Transformers and charging stations
  • Power link for generators, and many more.


Busbars are crucial in electrical distribution systems and offer several benefits:


Today, more and more people are opting for busbar technology. The superiority of busbar vs cable is clear to see. Besides improved, more reliable electricity distribution performance, here are some of the top reasons why busbars are the preferred choice.

Compact design
Busbars uses less space than cable systems. Unsightly tangles of cables are avoided.  What\'s more, the compactness of the busbar enclosure means the tightly compressed conductors inside are reliably isolated.

Better resistance
Short circuit testing has shown that busbars have better resistance than cables. A thin flat tire helps in optimal distribution of density of current,and reduces resistance. Voltage loss is much lower.

Busbar, being a modular design, is able to fit into any structure. They can be easily relocated, re-installed and modified to fit, without any capital expenditure and only minimal interruption of service. The possibility of moving, reconfiguring and expanding cable systems can be disruptive and expensive.

Lower lifetime cost
Easy installation, faster assembly time and lower material costs make busbars more competitive than cable systems. C zmsdistribute power more economically and are practically maintenance free. They cannot be damaged by rodents and offer better weather-resistance - so their lifetime cost is much lower than cables.

Faster and safer installation
Busbar systems are pre-designed to fit the installation space, and can be installed quickly and easily, resulting in lower material and on-site costs.Less manpower is needed; no special tools are required; installers can install up to 10 mtrs of busbar at a time.

Future proof
Being a flexible system, busbars can be easily adapted for upgrades and changes in the future. Busbars allow customers peace of mind, and confidencethat their power distribution system will safely and efficiently provide power for years.


Messung Electrical Engineering is the authorised distributor for the world’s leading busbar company, WöhnerGmbH, Germany.

With more than 100 registered patents, Wöhner has been shaping the future of energy distribution and control technology. Wöhner serves customers in over 80 countries through an extensive network of 11 subsidiaries and representatives across the world.

Messung brings Wöhner\'s electro-technical safety systems, panel mounting and busbar assembly for discerning customers in India. Using Wöhner\'s busbar power distribution products, Messung develops the total low voltage power distribution control system. Messung\'s Industry 4.0 compatible, Cloud-based solutions provide \'anytime, anywhere\' supervisory and control features for every application - be it a water treatment plant or machine tool.

To know more about Messung’s busbar panels or busbar price, contact Messung today.

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Joined: February 27th, 2021
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