Vacon nxs - Page 45

cables are used in parallel for larger AC drives, you must 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.
Table 23: The selection of the correct cable
Cable type EMC requirements
1
st
environment 2
nd
environment
Category C1 and C2 Category C3 Category C4 No EMC protection
The mains cable 1 1 1 1
The motor cable 3 * 2 2 2
The control cable 4 4 4 4
1.
A power cable for a fixed installation. A cable for the specified mains voltage. A shielded
cable is not necessary. We recommend an NKCABLES/MCMK cable.
2.
A symmetrical power cable with a concentric protection wire. A cable for the specified
mains voltage. We recommend an NKCABLES/MCMK cable. See Fig. 18.
3.
A symmetrical power cable with a compact low-impedance shield. A cable for the
specified mains voltage. We recommend an NKCABLES /MCCMK, SAB/ÖZCUY-J or
equivalent cable. See Fig. 18. * = For the EMC levels C1 and C2, it is necessary to have a
360º grounding of the shield with cable glands in the motor end.
4.
A screened cable with a compact low-impedance shield, for example an NKCABLES/
JAMAK, or an SAB/ÖZCuY-O cable.
For the definitions of EMC protection levels, see Chapter 9.3 The compliance with the product
standard IEC/EN 61800-3 + A1.
A
C
B
Fig. 18: Cables with PE conductors
A. The PE conductor and the shield
B. The PE conductors
C. The shield
In all the frames, to obey the EMC standards, use the default values of the switching
frequencies.
POWER CABLING VACON · 45
24-HOUR SUPPORT +358 (0)201 212 575 · EMAIL: VACON@VACON.COM
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