Electrification of RTGs

crane hoist manufacturer

Besides operational efficiency and effectiveness, ensuring optimal use of energy has become
an important consideration in view of rising energy costs and a general desire of society to use the
world’s existing resources more effectively.

One area port operators worldwide are presently evaluating and testing is the use of conductor
rails operating RTGs in container yard aisles as an alternative to a diesel
generator power supply.

Ports are presently testing such systems with manual coupling/de-coupling to and from the
conductor rail system. Whilst this manual system might achieve some of the objectives, such as:
  • Reduction of environmental pollution (CO2 emissions)
  • Cost effectiveness (diesel cost)
  • Reduction of sound levels
  • Reduction of maintenance and repair costs
There are still operational disadvantages, such as:
  • The additional staff required
  • Time delays during aisle change
  • Heavy plug, which requires manual handling.

To overcome these disadvantages VAHLE has
the conductor rail systems as an extension to their manual, an “auto-drive-in” system
for coupling/de-coupling to and from the
conductor rail system.

This creates the following substantial advantages:
  • Safe coupling/de-coupling operation
  • Fast and efficient aisle switch-over
  • No additional man required to couple/de-couple electrical power
  • Highly efficient

VAHLE has also further developed the
supporting steel structure for the conductor rails.
In the past the design of the steel structure was
rather conventional mainly using I-beams and
C-channels. The design of the auto-arm or the
bogie for manual operation had to follow the
steel structure design using a number of guide
rollers for safe and reliable guidance along the

The simplified modular design (6 m sections)
and the use of pipes as the guiding elements for
the auto-arm or the bogie has the following
substantial advantages compared to the old
conventional design:
  • Easier and faster installation
  • Grossly reduced number of guiding rollers (moving parts)
  • More compact and simpler design of auto-arm or bogie
  • Safer, more reliable and more precise guidance
  • Easier and faster access for the auto-arm
  • Reduced maintenance