tech talk
Learn more at www.igus.com/info/energychains
for crane electrification
The performance of a crane is directly dependent on its electrification system. With various power supply
options available and a range of application requirements to take into consideration, making a selection on
which type of system to implement can be difficult. It is essential to consider the benefits and disadvantages
of prospective energy supply systems before deciding which is best.
Busbars vs. energy chains
Busbars
One power system that is frequently offered for
overhead cranes is an open or insulated busbar.
These horizontal metal conductors are found to be
a standard in many industries. They can be used
in indoor or outdoor cranes, as well as on runways
with more than one bridge operating on them.
Most busbars are comprised of seven main
components. The system supplies power along the
runway or bridge of a crane through steel or copper
conductor bars. A collector arm slides along the
conductor bar, allowing current to pass from the
electrified conductor bar to the moving collector
and on to the moving hoist or other travelling
element. The conductor bars are typically hung
from insulated hangers. The hangers are attached
to a mounting bracket that is either attached to
the wall, crane or machine structure. An end cover
provides protection at the end of the conductor bar,
and anchor clamps and expansion joints are used
to manage thermal expansion and contraction.
