We are mainly dealing with SIEMENS Busbar Trunking System
- CD-K Lighting Busbar: (25 – 40) Amp
- CDL Lighting Busbar: (25 – 40) Amp
- BD01 Small Power Busbar: (40 – 160) Amp
- BD02 Medium Power Busbar: (160 – 1250) Amp
- LX High Power Busbar: (800 – 6300) Amp
- LR Cast Resin system: (650 – 6150) Amp
Busbar Trunking System
The Busbar trunking system, used to distribute medium power, is mainly installed in industrial,
commercial, residential and service buildings. It is offered in aluminum conductor and copper
conductor versions with 100A, 160A, 250A and 400A ratings. The casing is made of hot
galvanized steel sheets with two profiles assembled together which gives the product rigidness
and mechanical strength.
The standard product is offered in the 3P+N+PE version or in the 3P+N+Fe+Pe version. The
aluminum alloy bars are galvanized and tin-plated along the whole length while the copper bars
can be tin-plated or sliver-plated on request. The standard protection rating the SYSTEM Busbar
trunking system is IP55 without any additional accessories.
The outlet has an automatic opening/closing system when the tap-off box is automatically
connected or unconnected, in order to protect the integrity of the IP rating. The junction is
achieved through a connection system that guarantees at the same time both the mechanical and
electrical junction with four screws. The system doesn’t require any kind of maintenance.
Following are some advantages of Bus bar trunking system over normal cabling system:
- On-site installation times are reduced compared to hard-wired systems, thus leading to
- It provides increased flexibility in design and versatility with regard to future
- Greater safety and peace of mind for specifies, contractors and end-users.
- Because of the simplicity of Busbar, it is easy to estimate costs from the
design/estimating stage through to installation on site. This is because the technical
characteristics and price of each component are always known.
- It is short sighted to compare the cost of Busbar against that of a length of cable — and
not the real cost of a cable installation to include multiple runs of cable, tray and fixing,
let alone the protracted time and effort of pulling cables.
- Distribution Busbar distributes power along its length through tap-off points along the
Busbar at typically at 0.5 or 1 m centers. Tap-off units are plugged in along the length of
the Busbar to supply a load; this could be a sub distribution board or, in a factory, to
individual machines. Tap-offs can normally be added or removed with Busbar live,
eliminating production down time.
- Installed vertically the same systems can be used for rising-mains applications, with tap-
offs feeding individual floors. Certified fire barriers are available at points where the
Busbar passes through a floor slab. Protection devices such as fuses, switch fuses or
circuit breakers are located along the Busbar run, reducing the need for large distribution
boards and the large quantities of distribution cables running to and from installed
- Very compact so provides space savings
- Where aesthetics has to be considered, Busbar trunking can be installed with natural
galvanized, aluminum, or painted finish. Special colors to match switchboards or a
specific color scheme are also available on request.
- Busbar trunking has several key advantages over conventional forms of power
distribution including: –
(a) Reduced, onsite installation times when compared to hard-wired systems thus leading
to cost savings.
(b) Increased flexibility in design and versatility with regard to future modifications.
(c) Increased safety features brought about by the use of high quality, manufactured
components, which provide greater safety and peace of mind for specifiers, contractors
- Uneven distribution of current takes place where multiple runs of cables are used in
- Busbar trunking has tap-off points at regular intervals along each length to allow power
to be taken off and distributed to where it is needed. Because it is fully self-contained it
needs only to be mechanically mounted and electrically connected to be operational.
- For higher ratings of power distribution, we need to have multiple runs of cable. In such
conditions unbalanced distribution of current takes place and causing overheating of
some cable. This is completely avoided in the BTS systems.
- When multiple runs of cables are used it often leads to improper end connections thereby
causing overheating of contacts, burning of cables ends, and is a major cause of fire. This
is completely avoided in BTS systems.