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Functions
8.1 Start-up
• Direct-on-line starting (Page 143)
• Motor heating (Page 143)
This starting mode is not available for the 3RW55 Failsafe soft starter.
Breakaway pulse
In connection with the 4 soft starting modes, you can set an advance breakaway pulse
(Page 144).
Tip
The Automatic parameterization (Page 132) supports you during commissioning and optimizes
the starting parameters of the 3RW55 and 3RW55 Failsafe soft starters each time the motor is
started.
8.1.2
Automatic parameterization
Operating principle
When automatic parameterization is activated, the 3RW55 or 3RW55 Failsafe soft starter
optimizes the starting parameters each time the motor is started. The recommended
parameters of the selected application are automatically accepted as the start value for
automatic parameterization.
For the PRESET starting time the ramp-up time is adopted as the start value and, for the current
limiting, the preset value of the application. The parameters are selected in such a way that the
motor starts immediately with minimum current and does not falter during start-up. Automatic
parameterization can be set for each of the parameter sets.
Adjustment of the parameters with automatic parameterization
As long as the "Automatic parameterization" function is active, the 3RW55 or 3RW55 Failsafe soft
starter monitors and analyzes the starting times and the starting currents at every start up.
The 3RW55 or 3RW55 Failsafe soft starter always sets the selected starting mode to "Soft starting
with voltage ramp and current limiting (Page 140)". If another starting mode is required,
deactivate the automatic parameterization and modify the corresponding parameters.
The following parameters are also changed by the automatic parameterization and therefore
learned:
• Starting voltage
• Ramp up time
• Current limiting value
132
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006
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