Power Electronics SD750FR, Hardware And Installation Manual

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SD750FR POWER ELECTRONICS
46
POWER CONNECTION
EN
The two environments are divided in four categories C1 to C4 that are summarized in the following
table.
FIRST ENVIRONMENT SECOND ENVIRONMENT
C1 C2 C3 C4
Restricted Installation [1] NO YES YES YES [2]
Notes
[1] “Restricted Installation” means that the installation and commissioning must be carried out by specialist
personnel.
[2] C4 Category applies only for complex systems or when ratings are equal or above to 1000 V or 400 A which
are unable to comply with the limits of C3 Category. In these cases, C4 Category can be achieved by adjusting
the equipment in situ and applying the EMC recommendations.
SD750FR compliance
SD750FR variable speed drives have been designed for the industrial use (Second Environment). The
implementation of radio frequency interference filters (RFI filters) and dV/dt filters as standard, and the
correct installation following the recommendations within this manual, permit to achieve compliance
with C3 category defined in IEC/EN 61800-3.
Optionally, the SD750FR drive with non-floating earth can be installed in residential areas (First
Environment) by employing optional RFI filters that permit to achieve the C2 category.
The SD750FR is not a retail unit. It is neither a plug in device nor a movable device and it is intended
to be installed and commissioned by qualified personnel. Therefore, C1 category will not be required.
The SD750FR with floating earth configuration can be installed in industrial (Second Environment) IT
grids. Although it does not integrate RFI filters, following the installation recommendations within this
manual and with its integrated dV/dt filter, it achieves the C3 category defined in IEC/EN61800-3.
Connection
The SD750FR do not require the use of shielded motor cable to achieve compliance with C3 category
when a correct installation is made. Wiring and Installation recommendations are included in sections
“Power connection and wiring” and “Ground connection”.
In shielded cables it is recommended to connect the shield by making 360° contact in both the drive
cabinet and the motor terminal box. As an example, EMC cable glands can be installed as shown in
the next figure.