Installation manual

Configuration Mode (ConF)
108 S1A28692 03/2010
The value of the [Volt surge limit. opt] (SOP) parameter corresponds to the attenuation time of the cable
used. It is defined to help to prevent the superimposition of voltage wave reflections resulting from long cable
lengths. It limits overvoltages to twice the DC bus rated voltage.
The tables on the following page give examples of correspondence between the
[Volt surge limit. opt] (SOP) parameter and the length of the cable between the drive and the motor. For
longer cable lengths, an output of the filter or a dV/dt protection filter must be used.
For motors in parallel, the sum of all the cable lengths must be taken into consideration. Compare the length
given in the table row corresponding to the power for one motor with that corresponding to the total power, and
select the shorter length.
Example: Two 7.5 kW (10 HP) motors
Take the lengths on the 15 kW (20 HP) table row, which are shorter than those on the 7.5 kW (10 HP) row,
and divide by the number of motors to obtain the length per motor (with unshielded "GORSE" cable and
SOP = 6, the result is 40/2 = 20 m maximum for each 7.5 kW (10 HP) motor).
In special cases (for example, different types of cable, different motor powers in parallel, different cable lengths
in parallel, etc.), we recommend using an oscilloscope to check the overvoltage values obtained at the motor
terminals.
To retain the overall drive performance, do not increase the SOP value unnecessarily.
Tables giving the correspondence between the SOP parameter and the cable length, for 400 V line supply
For 230/400 V motors used at 230 V, the [Motor surge limit.] (SUL) parameter can remain set to
[No] (nO).
Altivar 32 Motor Cable cross-
section (min)
Maximum cable length in meters
Reference Power Unshielded "GORSE" cable
Type H07 RN-F 4Gxx
Shielded "GORSE" cable
Type GVCSTV-LS/LH
Shielded "BELDEN" cable
Type 2950x
kW HP in mm² AWG SOP = 10 SOP = 8 SOP = 6 SOP = 10 SOP = 8 SOP = 6 SOP = 10 SOP = 8 SOP = 6
ATV32HO37N4 0.37 0.50 1.5 14 100 m 70 m 45 m 105 m 85 m 65 m 50 m 40 m 30 m
ATV32HO55N4 0.55 0.75 1.5 14 100 m 70 m 45 m 105 m 85 m 65 m 50 m 40 m 30 m
ATV32HO75N4 0.75 1 1.5 14 100 m 70 m 45 m 105 m 85 m 65 m 50 m 40 m 30 m
ATV32HU11N4 1.1 1.5 1.5 14 100 m 70 m 45 m 105 m 85 m 65 m 50 m 40 m 30 m
ATV32HU15N4 1.5 2 1.5 14 100 m 70 m 45 m 105 m 85 m 65 m 50 m 40 m 30 m
ATV32HU22N4 2.2 3 1.5 14 110 m 65 m 45 m 105 m 85 m 65 m 50 m 40 m 30 m
ATV32HU30N4 3 - 1.5 14 110 m 65 m 45 m 105 m 85 m 65 m 50 m 40 m 30 m
ATV32HU40N4 4 5 2.5 12 110 m 65 m 45 m 105 m 85 m 65 m 50 m 40 m 30 m
ATV32HU55N4 5.5 7.5 4 10 120 m 65 m 45 m 105 m 85 m 65m 50 m 40 m 30 m
ATV32HU75N4 7.5 10 6 8 120 m 65 m 45 m 105 m 85 m 65 m 50 m 40 m 30 m
ATV32HD11N4 11 15 10 8 115 m 60 m 45 m 100 m 75 m 55 m 50 m 40 m 30 m
ATV32HD15N4 15 20 16 6 105 m 60 m 40 m 100 m 70 m 50 m 50 m 40 m 30 m
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: [phone]-Outside Local Area: [phone]-www.stevenengineering.com