Danfoss VLT FC 102 Series Design Manual page 119

Electrical Installation Design Guide
NOTICE!
Installations with cables connected using a common joint, as shown in the first example in the picture, are only
recommended for short cable lengths.
NOTICE!
When motors are connected in parallel, 1-02 Flux Motor Feedback Source cannot be used, and 1-01 Motor Control
Principle must be set to Special motor characteristics (U/f).
6 6
a
d
b
e
f
c
Figure 6.41 Parallel Motor Connection
c, d) The total motor cable length specified in section 4.5, General Specifications, is valid as long as the parallel cables are
kept short (less than 33 ft [10 m] each).
d, e) Consider voltage drop across the motor cables.
e) Be aware of the maximum motor cable length specified in Table 6.35.
e) Use LC filter for long parallel cables.
MG11BC22 Danfoss A/S © Rev. 06/2014 All rights reserved. 117