Controller Selection; Controller Ratings For "In Line" Wiring Configurations - Siemens SIKOSTART 3RW35 Instruction Manual

2.4.2 Soft Start with Soft Stop
Figure 6, like Figure 5, shows the voltage and speed curves for
a soft start but with controlled deceleration. The potentiometers
have been set as follows.
U The initial voltage is set at approximately 30%.
T1 The start time setting is greater than 0.
T2 The stop time setting is greater than 0.
T The decel timer setting is greater than 0 which allows the
d
motor to soft stop.
The motor starting ramp is similar to the one shown in Figure 5.
But, when the run coil is de-energized, a motor stopping ramp
is formed where the motor voltage starts at 100% and decreas-
es to U2 (the initial start voltage) within the T2 time setting.
Then the voltage drops to zero after the Td time period. The time
required to decelerate may be more or less than the T1 setting
depending on the connected inertia.
When the run coil is de-energized, the speed decreases
throughout the T2 time period and then coasts to zero.
Figure 6 - Voltage, Speed, & Coil Input Curves
for Soft Start with Soft Stop.
8

3 Controller Selection

Each controller has only one rating: "In Line" .
Table 1 lists the SIKOSTART controller partial catalog numbers
and ratings at various rated voltages.
Table 1 is for "In Line" wiring configurations only and shows cur-
rent and horsepower ratings for units at various rated voltages.
Table 1 Controller Ratings for "In Line" Wiring Configurations
In Line
Catalog Wiring
Number Amps 200V
3RW3552... 35 10
3RW3554... 57 15
3RW3555... 69 20
3RW3556... 80 25
3RW3558... 105 30
3RW3565... 131 40
3RW3566... 195 60
3RW3567 ... 248 75
3RW3572... 361 125
3RW3583... 480 175
3RW3584... 720 250
3RW3586... 960 350
Siemens Energy & Automation, Inc.
Horsepower at 50vC
230V 460V 575V
10 20 30
20 40 50
25 50 60
30 60 75
40 75 100
50 100 125
75 150 175
100 200 250
150 300 350
200 400 500
300 600 700
400 800 1000