Parameters
Parameters
Description
Breakaway time
The breakaway time determines the period during which the breakaway voltage is to be
present. Once the breakaway time has expired, the 3RW55 or 3RW55 Failsafe soft starter
begins start-up with the selected starting mode, e.g. voltage ramp or torque control.
Select a breakaway time that is at least long enough to ensure that, after the set time has
elapsed, the motor does not stop again but continues to accelerate in the selected starting
mode immediately. The setting "0 s" deactivates the function of the breakaway pulse.
• Factory setting: 0 s
• Setting range: 0 ... 2 s
• In steps of: 0.01 s
Breakaway voltage
The breakaway voltage is used to set the breakaway torque to be generated. The breakaway
torque can be up to 100% of the switch-on torque generated during direct-on-line starting.
Select a breakaway voltage that is high enough to ensure that the motor starts rotating as soon
as the start command is issued to the 3RW55 or 3RW55 Failsafe soft starter.
• Factory setting: 40%
• Setting range: 40 ... 100%
• In steps of: 5%
8.2
Run-down
8.2.1
Stopping modes
Operating principle
Just like starting, stopping can also be adapted to the application:
Functions
8.2 Run-down
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
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Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006
