Cut Sheet

Volume 10—Enclosed Control CA08100012E—November 2012 www.eaton.com V10-T17-45
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17.6
Technical Data and Specifications
Reduced Voltage Starters
Operation
Starting and Stopping Modes
The S611 has a variety of starting and stopping methods to provide superior performance in the
most demanding applications. The motor can be started in either Voltage Ramp Start or Current
Limit Start mode. Kick Start and Soft Stop are available within both starting modes.
Voltage Ramp Start
Provides a voltage ramp to
the motor resulting in a
constant torque increase. The
most commonly used form of
soft start, this start mode
allows you to set the initial
torque value and the duration
of the ramp to full voltage
conditions. Bypass contactors
close after ramp time.
●
Adjustable initial torque
0–85% of locked rotor
torque
●
Adjustable ramp time
0.5–180 seconds (can be
extended with factory
modification)
Starting Characteristics—Ramp Start
Current Limit Start
Limits the maximum current
available to the motor during
the start phase. This mode of
soft starting is used when it
becomes necessary to limit
the maximum starting current
due to long start times or to
protect the motor. This start
mode allows you to set the
maximum starting current as
a percentage of locked rotor
current and the duration of
the current limit. Bypass
contactors close after current
limit time.
●
Maximum current of
0–85% locked rotor current
●
Adjustable ramp time
0.5–180 seconds (can be
extended with factory
modification)
Starting Characteristics—Current Limit Start
Initial
Torque
Kick
Start
Torq
Kick Start Time
100%
Bypass Bypass
Voltage
Ramp
Rated
Voltage
Soft Start Time
t
r
Start Run
Torque
Time (Seconds)
100%
Start Run
Speed
Time (Seconds)
Initial
Torque
Kick
Start
Torq
Kick Start Time
100%
Bypass Bypass
Soft Start Time
Start Run
Current
Time (Seconds) Time (Seconds)
100%
Start Run
Speed