Liebherr Downloads - Manual (Page 5)

5
Bernhard Meier, Federally
Certified Purchaser, Strategic
Purchaser, Material Group Air
Conditioning Systems,
SBB Passenger Transportation
1. The DPZ+ project compris-
es the comprehensive mod-
ernisation and supplementa-
tion of double-deck push-pull
communter trains for Zurich’s
urban railway. Mr. Meier, how
much value does the Swiss
Railway SBB attach to this
project?
The DPZ+ project is one of the most
important refit projects that has been
completed in SBB’s own workshops.
This contract ensures that basic ca-
pacity at the SBB production facility in
Olten (Solothurn), in particular, will be
utilised over the next few years. As our
customer, the Zurich public transport
authority (ZVV) expects this contract to
be completed on schedule to the mutu-
ally agreed quality standards. Air con-
ditioning on the double-deck trains will
make rail travel a far more comfortable
experience for our passengers, which
is why its smooth technical implemen-
tation is so important to us.
2. Liebherr-Transportation
Systems has been chosen to
supply the air conditioning
systems. What were the deci-
sive factors?
Liebherr-Transportation Systems,
along with other system providers,
took part in SBB’s public invitation to
tender. Having looked at the bids in
detail, Liebherr was chosen to supply
the tendered services since the com-
pany’s bid provided both the best so-
lution technically, while economically
it proved to be the most interesting
proposal. Liebherr was also able to
present relevant references in similar
refit projects. SBB firmly believes it has
chosen the right partner and looks for-
ward to working together on this excit-
ing project.
3. Which factors will deter-
mine the success of this proj-
ect, especially regarding air
conditioning systems?
It is in any case essential that we
comply with all the contractually
agreed milestones. This initially in-
volves implementing the design from
the project catalogue, then supplying
the dummy housing to test how it fits
in the car body, and extends through to
the on-schedule delivery of all 238 air
conditioning systems.
Three Questions to...
But success also depends on imple-
menting the insights garnered from the
prototype vehicles, in order to identify
and correct any faults at an early stage.
Retrofitting double-deck trains poses
a very special challenge, which can
technically only be overcome in close
cooperation with suppliers and those
responsible at SBB. The logistics con-
cept is also crucially important since
it must ultimately ensure that the SBB
workshops receive supplies on time.
New Generation of Onboard Power
Supply Systems for Passenger Trains
Liebherr-Transportation Systems
has many years of experience in the
integration of converters and power
supply systems in rail vehicles. These
capabilities have been proved in many
projects. For example, Deutsche Bahn
AG’s entire fleet of double-deck ve-
hicles, built since 1997, entered into
service with onboard power supply
systems by Liebherr.
The experience gained in operation
is channeled back into ongoing further
development of the systems based
on latest technologies. Two years ago
Liebherr started to develop a new gen-
eration of modular onboard power sup-
ply systems for passenger trains.
The new onboard power supply is
able to deliver the necessary amount of
electricity even to vehicles with com-
plex systems.
The development of the new sys-
tems was completed on schedule in
mid-2009 with the delivery of the first
close-to-production prototype. This
was installed in a double-deck car of
Deutsche Bahn AG’s 2003 series by its
vehicle maintenance operation in Wit-
tenberge, Germany, homologized in
the company’s test bays in Munich and
approved for operation on Deutsche
Bahn’s electric and diesel locomotives.
Since then the test vehicle operates
very successfully in normal timetable
service around the city of Stuttgart.
Liebherr recently offered an identi-
cal system together with the necessary
air conditioning units under Deutsche
Bahn AG’s tender for retrofit air condi-
tioning of double-deck vehicles in the
751.0, 756.0, 761.0 and 761.2 series.
The technical concept is based on
an innovative modular design, which
enables the input unit to be extended
to all UIC voltages in the same con-
verter housing and also permits differ-
ent configurations. In addition, liquid-
cooled components are used, keeping
dimensions compact and ensuring ef-
ficient use of the restricted space avail-
able on rail vehicles. Compared with
conventional designs, the life cycle
costs were also reduced by installing
pluggable modules. Maintenance has
been made easier and the maintenance
intervals have been shortened by opti-
mized cooling airflows.
Newly developed power supply system installed in a Deutsche Bahn double-deck car
Liebherr air conditioning system
for the DPZ+ project