SEW-Eurodrive MOVITRAC 07, Системное руководство

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5
104
System Manual – MOVITRAC® 07
Line chokes
Project Planning
Output filter Usually, there is no need for an output filter with small groups of two to three motors. An
output filter HF... is required if the maximum motor lead length (l
max
) given in the table
is not adequate. This may be the case in large groups (n) or when there are long motor
lead lengths connected in parallel (l
tot
). In this case, it is the voltage drop on the motor
lead which restricts the maximum motor lead length, not the limit value in the table. The
total value of the rated motor currents must not exceed the rated throughput current of
the output filter.
5.13 Line chokes
1-phase Use is optional under the following circumstances:
• Reduction in the supply system current harmonics
• Support for overvoltage protection
Use is required under the following circumstances:
• Supply system inductance values less than 100
µ
H per branch
• For limiting the inrush current when operating more than one unit on a shared supply
system contactor
3-phase Use is optional under the following circumstances:
• Support for overvoltage protection
Use is required under the following circumstances:
• For limiting the inrush current when operating more than four units on a supply sys-
tem contactor
Connection to the frequency inverter output is only permitted in size 0S, 0M and 0L when
the output stage is inhibited.