Control Techniques COMMANDER SE User Manual

130 Commander SE Advanced User Guide
Issue Number: 4
4.10.3 SE Inrush resistor
*Commander SE size 5 uses a resistor as its inrush current limiting resistor. Its value remains constant as the temperature
increases.
The Commander SE sizes 1 to 4 use surge guards as its inrush current limiting resistors. The ohmic values are
given at 25
o
C. This ohmic value reduces as the surge guards temperature increases.
4.11 High-capacitance cables
Most cables have an insulating jacket between the cores and armour or shield; these cables have low capacitance and are
recommended. Cables that do not have an insulating jacket tend to have high capacitance; if a cable of this type is used, the
maximum cable length is half that quoted in the table. The drawing below shows how to identify the two types.
Figure 4-10 Cable construction influencing the capacitance.
Maximum motor cable lengths
The capacitive loading of the drive by the motor cable means that the cable length limits shown in the table must be
observed. Failure to do so can result in spurious OI.AC tripping of the drive. If longer cable lengths are required, consult your
local Drive Centre or distributor.
The capacitance of the cable used for the maximum cable lengths and EMC testing on Commander SE was measured at
412pF/m when using method 1 and 130F/m when using method 2, as below.
Method 1
By connecting the 3 phases together as one node and connecting the screen and earth (if any) as the other node and
measuring the capacitance between these two points.
Drive
Inrush resistor
Ω at 25
o
C
Drive
Inrush resistor
Ω at 25
o
C
SE11200025 10 SE33200550 30
SE11200037 10 SE33200750 30
SE11200055 10 SE33400550 30
SE11200075 10 SE33400750 30
SE2D200075 20 SE43401100 30
SE2D200110 20 SE43401500 30
SE2D200150 20 SE43401850 30
SE2D200220 30 SE53402200 22*
SE23200400 30 SE53403000 22*
SE23400075 20 SE53403700 22*
SE23400110 20
SE23400150 20
SE23400220 20
SE23400300 30
SE23400400 30
NOTE
Normal capacitance
Shield or armour
separated from the cores
High capacitance
Shield or armour close
to the cores
412pF

Control Techniques COMMANDER SE Specifications

General

Brand	Control Techniques
Model	COMMANDER SE
Category	Controller
Language	English