61
CONNECTION OF THE POWER UNIT
4.2.6.4 Motor cable length for parallel operation of motors
The resulting motor cable length for parallel operation of motors, or parallel installation
with multiple cables arises from the following formula:
resultingmotorcablelength=∑singlecablelengthx√Number of motor cables
4.2.6.5 Motor cable cross-section
The motor cable cross-section is dependent
• on the characteristic of the output current (e.g. not sine-wave).
• ontherealeectivevalueofthemotorcurrent.
• on the cable length.
• on the type of the used cable.
• on the ambient conditions such as bundling and temperature.
4.2.6.6 Interconnection of the motor
NOTICE
Protect motor against voltage peaks !
DrivecontrollersswitchattheoutputwithdV/dt≤5kV/µs.Voltagepeaks
that endanger the insulation system at the motor can occur especially in
caseoflongmotorcables(>15m).Amotorchoke,adv/dt-lterorsine-
waveltercanbeusedforprotectionofthemotor.
NOTICE
Faulty behaviour of the motor !
The connecting-up instructions of the motor manufacturer are always
generally valid !
4.2.6.7 Terminal block X1B motor connection
R
W
- - ++ VU
Name Function Cross-section
U, V, W Motor connection 0.5...2.5 mm² / AWG 20-14
Figure 20: Terminal block X1B motor connection