6 Electrical Installation
6.1 Cable Connections
The mains cables are connected to terminals L1, L2, and L3. The motor cables are connected to terminals U, V, and W.
A
B
C
e3
0b
g0
78
.2
0
U/T1
V/T2
W/T3
L1
L2
L3
B
-
B
+
/R
+
R
-
R
Illustration 13: Principal Connection Diagram
A
The control panel
B
The control unit
C
The power unit
For EMC-compliant installation, see
6.2 EMC-compliant Installation
6.1.1 General Cable Requirements
Use cables with a minimum heat resistance of +70 °C (158 °F). In the selection of the cables and the fuses, refer to the nominal
output current of the drive. Find the nominal output current on the nameplate.
We recommend selecting the cables and the fuses to agree with the output current because the input current of the AC drive is
almost the same as the output current.
For information on how to make the cable installation to comply with the UL standards, see
.
If the motor temperature protection of the drive (see VACON
®
All in One Application Manual) is used as an overload protection,
select the cable to agree with the protection. If 3 or more cables are used in parallel for larger AC drives, use a separate overload
protection for each cable.
These instructions are valid only for processes that have 1 motor and 1 cable connection from the AC drive to the motor. In other
conditions, speak to the manufacturer to get more information.
6.1.2 UL Standards on Cabling
To comply with the UL (Underwriters Laboratories) regulations, use a UL-approved copper wire with a minimum heat resistance of
60 °C or 75 °C (140 °F or 167 °F).
To comply with the standards, use cables with +90 °C (194 °F) heat resistance for sizes 0170 2 and 0168 5 (FR8), and 0261 2, 0261 5,
0300 2 and 0300 5 (FR9).
Use Class 1 wire only.
When the drive has Class T and J fuses, it can be used on a circuit that gives a maximum of 100 000 rms symmetrical amperes, and a
maximum of 600 V.
AQ275638903263en-000601 / DPD00910
38 | Danfoss A/S © 2022.12
Electrical Installation
VACON® NXS/NXP Air-cooled
Operating Guide
