Unidrive
LV
model sizes 1 to 3 Installation Guide
Issue code: uliu1
2-30 Installing the Drive
2.7 Wiring recommendations
Observe the wiring recommendations given in this
section. Recommendations are given separately for
the following:
Routine EMC precautions
• Recommended when strict compliance with
emission standards is not required.
• Minimized risk of disturbing adjacent
electronic equipment.
Compliance with EMC emission
standards
• Strict compliance with emission standards.
• When the Drive is installed in a residential
area, or adjacent to sensitive electronic
equipment such as radio receivers or similar.
The details of individual installations may vary, but
details which are indicated in the recommendations
to be important for EMC must be adhered to
closely.
For further details when EMC emission requirements
are to be met, refer to the Unidrive LV EMC Data Sheet
for the size of Drive used.
Isolator
Contactor
AC
supply
Ground
Key to symbols
Single power cable
Ground cable
0V
Output 3
Output 2
Output 1
Ground
Host
controller
Back-plate
Control cables
to the Drives
Drive
Optional external
braking resistor
No sensitive circuits permitted
in this zone
Power-ground
bus-bar
Enclosure
L1
L2
Three-core power cable or
three single power cables
Fuses or
MCB
L3
L1 L2 L3 U VW+
_
Four-core power cable
(3-phase + ground)
Figure 2–21 Wiring guidelines for routine EMC precautions (model sizes 1 to 3)
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