Lenze i700 Manual - Manual (Page 120)

DC−bus operation
EMC in DC−bus operation
Compliance with EMC category C3 (industrial premises)
7
l
120 EDS700ACBA EN 4.0
7.7 EMC in DC−bus operation
7.7.1 Compliance with EMC category C3 (industrial premises)
Applications for the "second environment" on industrial premises must comply with EMC
category C3.
Observe the conditions for the compliance with EMC category C3:
ƒ The permissible motor cable length is
£ 50 m for each axis.
ƒ The maximum sum of all motor cable lengths (
S l
mot
) must be observed.
ƒ Without a mains choke: 4 axes x 50 m = 200 m
– Switching frequency: 4 & 8 kHz
ƒ With the mains chokes assigned: 10 axes x 50 m = 500 m
If the number of axes deviates,
S l
mot
can be determined from the following diagram.
C3-MC
C3-NR
2
4
6
8
10
12
14
16
18
20
n
50 100 150 200 250 300 350 400 450 500
S
l [m]
mot
E70EMCX001 b
Fig. 7−2 Motor cable lengths for the compliance with category C3
n Number of axes
S l
mot
Sum of the motor cable lengths ...
C3−NR without mains chokes, according to the number of axes, for switching
frequency 4 & 8 kHz
C3−MC with mains chokes, according to the number of axes