Engineered for
cost savings
via
intelligent heat management
,
compactness and
protection
Ruggedized
for
extra
protection
All Danfoss VLT® drives follow the same design principle for fast,
flexible and fault-free installation, and efficient cooling.
The AC drives are available in a broad
range of enclosure sizes and protection
ratings from IP20 to IP66 to enable
easy installation in all environments:
mounted in panels, switch rooms or
as stand-alone units in the production
area.
Cost-saving heat management
In AC drives, there is total separation
between the back-channel cooling
air and the internal electronics.
This separation greatly reduces the
airflow over the sensitive electronics,
minimizing the exposure to
In order to reduce the potential
negative effects of vibration, the drives
have been ‘ruggedized’. It is a process
that ensures that critical components
on the PCB have increased protection,
significantly reducing the risk of
malfunction while at sea.
The printed circuit boards in the drives
are also all coated in accordance with
IEC 60721-3-3 class 3C3, providing
additional protection against moisture
and dust.
Reliable operation at
engine room temperatures
up to 55 °C
VLT® drives can operate at full load in
engine rooms with 50 °C temperature
and 55 °C at reduced power close to,
for example, pumps and thrusters.
There is no need for installation in air-
conditioned control rooms with long
motor cables.
contaminants. At the same time, it
removes heat efficiently which helps
to prolong product life, increase
the overall availability of the system
and reduce faults related to high
temperatures.
For example, by exhausting heat
directly outside, it is possible to reduce
the size of the cooling system in the
panel or switch room. This can be
achieved with Danfoss’ extremely
efficient back-channel cooling concept,
allowing heat to be vented outside the
control room.
Spark-free design
The VLT® drives conform to the Limited
Explosion Risk requirements in The
European Agreement concerning the
International Carriage of Dangerous
Goods by Inland Waterways, as they do
not create any sparks durings normal
operation and the temperature does
not exceed 200 °C.
In daily use, the benefits are equally
clear as the energy consumption
related to cooling can be reduced
significantly. This means that designers
can reduce the size of the air
conditioning system, or even eliminate
it entirely.
Coated circuit boards
The AC drive conforms as standard to
class 3C3 (IEC 60721-3-3) to ensure long
lifetime even in harsh environments.
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Danfoss Drives · DKDD.PB.302.A8.02 | Content |