Mechanical Installation; Planning The Installation Site; Cooling - Danfoss VLT Series Installation Manual

Mechanical Installation

3 Mechanical Installation

3.1 Planning the Installation Site

NOTICE
It is important to plan the installation of the VLT
Panel thoroughly. Neglecting to plan can result in extra
work during and after installation.
General considerations for the installation site
Select the best possible operation site by considering the
following (see details on the following pages, and the
respective design data of the VLT
•
Ambient operating temperature.
•
Installation method.
•
Requirements on tools and personnel.
•
Transport and lifting devices.
•
Accessibility of the installation site.
•
How to cool the unit.
•
Position of the frequency converter.
•
Cable routing.
•
Ensure that the power source supplies the correct
voltage and necessary current.
•
Ensure that all electrical conditions match with
®
the VLT Plus Panel design, such as, but not
limited to, short circuit capability, short circuit
withstand capability, and voltage.
•
Ensure that the motor current rating is within the
maximum current from the frequency converter.
•
®
If the VLT Plus Panel is without built-in fuses,
ensure that the external fuses are rated correctly.
Wire access
Ensure that proper cable access is present including
necessary bending allowance. Cables must be fixed to
remove force and weight from the cable termination
points. This can be done while using the C rails provided
in the plinth, applying cable clamps (not part of the
delivery). For EMC reasons, cable shields have to be
connected to the construction, for example with EMC cable
glands (not provided).
NOTICE
All cable lugs/shoes must mount within the width of the
terminal bus bar.
Space
Ensure proper space above and below the VLT
to allow airflow and cable access. In addition, consider
space in front of the unit to enable opening of the door of
the panel.
MG13B102
Installation Guide
®
Plus
®
Plus Panel):
®
Plus Panel
Danfoss A/S © 09/2015 All rights reserved.
Terminal locations
Terminal locations can be found in the detail documen-
tation, as provided per unit. The terminal locations vary
because of multiple options on the infeed options, power
rating, and so on. Data on maximum torque for the
termination points are provided in the panel documen-
tation.
NOTICE
All cable and terminal dimensions can be found in the
documentation package supplied with the unit.
The power cables are heavy and hard to bend. Consider
the optimum position of the frequency converter for
ensuring easy installation of the cables.

3.2 Cooling

NOTICE
The unit sucks the cooling air in from the bottom. To
allow cooling air intake from the bottom:
•
Place the unit on a double-floor (standard
installation).
•
For non double-floor environments: Make sure
to adapt for instance the plinth to allow cooling
air intake in from the bottom.
®
The VLT Plus Panel dissipates power in the form of heat.
Cooling can be obtained in different ways, by using the
cooling ducts in the bottom and the top of the unit. See
Installation of Duct Cooling Kit in Rittal Enclosures, for
further information.
The following recommendations are necessary for effective
cooling of the units:
•
Mount the unit allowing for unhindered cooling
airflow through the cooling fins.
•
Provide 225.0 mm (8.86 in) minimum clearance
above the unit for airflow.
•
Provide clearance for airflow. Do not cover all air
inlets and air outlets.
For airflow path, see Illustration 1.1, Illustration 1.2, and
Illustration 1.3.
NOTICE
Improper cooling can lead to derating and result in
reduced performance or failure of the application.
3 3
11