Lenze EVF9333−xV - Manual (Page 94)

Wiring of the standard device
Notes on project planning
Motor cable
5
5.2
5.2.10
l
5.2−10 EDSVF9333V EN 6.2−04/2012
5.2.10 Motor cable
ƒ The used motor cables must
– meet the requirements on site (e.g. EN 60204−1, UL),
– comply with the following voltage data: EN 0.6/1 kV, UL 600 V.
ƒ For shielded motor cables, only use cables with braid made of tinned or
nickel−plated copper. Shields made of steel braid are not suitable.
– The overlap rate of the braid must be at least 70 % with an overlap
angle of 90°.
ƒ Use low−capacitance motor cables:
Power class Capacitance per unit length
Core/core Core/shield
3 ... 11 kW from 2.5 mm 2 £100 pF/m £ 150 pF/m
15 ... 30 kW £ 140 pF/m £ 230 pF/m
45 ... 55 kW £ 190 pF/m £ 320 pF/m
75 ... 90 kW £ 250 pF/m £ 410 pF/m
ƒ Ensure that the motor cable is as short as possible to have a positive
effect on the drive behaviour.
ƒ In group drives (multiple motors on one controller), the resulting cable
length l
res
is the crucial factor:
I
res
[m] + (l
1
) l
2
) l
3
... ) l
i
) @ i
Ǹ
l
x
Length of the individual motor cable
l
res
Resulting length of the motor cable
i Number of individual motor cables
ƒ The "technical data" (chap. 3.1) provided for the motor cable length
must be observed.
Specification
Cable length