Unidrive
LV
model sizes 1 to 3 Installation Guide
Issue code: uliu1
2-28 Installing the Drive
Warning
STOP function
The STOP function does not
remove dangerous voltages
from the Drive or any external
option units.
Warning
Ground leakage current –
model size 3
Ground leakage current is
typically 5mA at 220V 50Hz. A
fixed ground connection must
be made before
AC power is
applied. In some applications,
safety regulations require a
duplicate ground connection.
Measured by the method
described in IEC950 Annex D.
Ground connections
(earthing, equi-potential bonding)
The ground terminal of the Drive must be
connected to the system ground of the
AC supply.
The ground wiring must conform to local
regulations and codes of practice.
Refer to Wiring recommendations later in this chapter.
Warning
The ground loop impedance
must conform to the
requirements of local safety
regulations.
The Drive must be grounded by
a connection capable of
carrying the prospective fault
current until the protective
device (fuse, etc) disconnects
the
AC supply.
The ground connections must
be inspected and tested at
appropriate intervals.
Power and ground terminals
Figure 2–20 Locations of the power and
ground terminals
Terminal sizes and tightening torques
Warning
To avoid a fire hazard and
maintain validity of the UL
listing, adhere to the specified
tightening torques for the
power and ground terminals.
Refer to the following tables.
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