4
vacon • 29 Power cabling
Table 11. Cable types required to meet standards.
1 = Power cable intended for fixed installation and the specific mains voltage. Shielded cable not
required. (MCMK or similar recommended).
2 = Symmetrical power cable equipped with concentric protection wire and intended for the spe-
cific mains voltage. (MCMK or similar recommended). See Figure 18.
3 = Symmetrical power cable equipped with compact low-impedance shield and intended for
the specific mains voltage. [MCCMK, EMCMK or similar recommended; Recommended
cable transfer impedance (1...30MHz) max. 100 mOhm/m]. See Figure 18.
*360º earthing of the shield with cable glands in motor end needed for EMC level C2.
4 = Screened cable equipped with compact low-impedance shield (JAMAK, SAB/ÖZCuY-O or
similar).
Figure 18.
NOTE: The EMC requirements are fulfilled at factory defaults of switching frequencies (all frames).
NOTE: If safety switch is connected the EMC protection shall be continuous over the whole cable
installation.
4.1 Circuit breaker
Please disconnect the drive via an external circuit breaker. You have to provide a switching device
between supply and main connection terminals.
When connecting the input terminals to the power supply using a circuit breaker, observe that this
is of type B or type C and ensure it has a capacity of 1.5 to 2 times of the inverter’s rated current
(see Table 24 and Table 25).
NOTE: circuit breaker is not allowed in installations where C-UL is required. Only fuses are recom-
mended.
EMC levels
Cable type
1
st
environment 2
nd
environment
Category C2 Category C3 Category C4
Mains cable 1 1 1
Motor cable 3* 2 2
Control cable 4 4 4
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