NORDAC SK 5xxE Manual
8
Subject to technical alterations
BU 0500 GB
1 General information
The NORDAC SK 5xxE is based on the tried and tested Nord platform. These devices feature a compact
design with optimum control characteristics.
These devices are provided with sensorless vector current control system which in combination with
asynchronous three-phase motor types constantly ensures an optimised voltage-to-frequency ratio. This has
the following significance for the drive: Peak start-up and overload torques at constant speed.
This series of devices can be adapted to individual requirements by means of the modular technology boxes.
Due to the numerous setting options, these inverters are capable of controlling all three-phase motors. The
power range is from
0.25kW to 7.5kW
with integrated mains filter.
This manual is based on the device software V1.7 R0 (see. P707) of SK 5xxE. If the frequency inverter used
has a different version, this may lead to some differences. If necessary, you can download the current manual
from the Internet (
http://www.nord.com/
).
For the SK 51xE/53xE there are additional descriptions for the functional safety (BU 0530) and the positioning
system (BU 0510). These contain all the necessary additional information for start-up.
If a bus system is used for communication, a corresponding description (BU 0020…BU 0090) is provided, or
this can be downloaded from the Internet (
http://www.nord.com/
).
In the standard version the device has a fixed cooling element, which causes corresponding heat dissipation if
it is installed in a control cabinet. In order to achieve less heat dissipation in the control cabinet or to enable a
smaller size, there are the following possibilities:
ColdPlate-Technology
Instead of a cooling element/fan, ColdPlate versions of the frequency inverter have a flat metal plate on the
rear side which is mounted on an existing mounting plate (e.g. the rear wall of the control cabinet) so as to
provide thermal conduction. The mounting surface can also be provided with a flow of cooling medium (water.
oil), which enables a better heat dissipation than air due to its greater thermal conductivity. Because the heat
dissipation does not take place in the control cabinet, the temperature of the interior remains considerably
lower, which results in a longer life span of the power electronics. The installation depth is also reduced and
the possible failure of the frequency inverter due to clogged air filters is avoided.
External heat sink technology
External heat sink technology is an optional supplement for ColdPlate devices. This is used if an external
cooling system is provided, but no liquid-cooled mounting plate is available. A cooling element is mounted on
the ColdPlate device, which passes through an opening in the rear panel of the control cabinet into the exterior
air-cooled environment. Convection takes place outside of the control cabinet, which results in the same
advantages as with ColdPlate technology.
