Commissioning
12.4 Commissioning the 3RW40
SIRIUS 3RW30 / 3RW40
Manual, 01/2010, 535 1995-02 DS01
103
12.4.6
Current limiting in conjunction with a starting voltage ramp and ramp-up
detection
Current limiting
The SIRIUS 3RW40 soft starter measures the phase current (motor current) continuously with
the help of integrated current transformers.
The motor current that flows during the startup process can be actively limited by means of
the soft starter. The current limiting function takes priority over the voltage ramp function.
As soon as a parameterizable current limit is reached, in other words, the voltage ramp is
interrupted and the motor is started with the current limiting value until it has started up
successfully. The current limiting function is always active with SIRIUS 3RW40 soft starters. If
the current limiting potentiometer is set to the clockwise stop (maximum), the starting current
is limited to five times the set rated motor current.
12.4.7
Setting the motor current
I
e
potentiometer
The rated operational current of the motor must be set with the I
e
potentiometer according to
the mains voltage and the motor connection (wye-delta). The electronic motor overload
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Summary of Contents for SIRIUS 3RW40
Page 1: ...Soft starters SIRIUS 3RW30 3RW40 Manual 01 2010 Industrial Controls Answers for industry ...
Page 2: ......
Page 68: ...Connecting 9 1 Electrical connection SIRIUS 3RW30 3RW40 68 Manual 01 2010 535 1995 02 DS01 ...
Page 210: ...Index SIRIUS 3RW30 3RW40 210 Manual 01 2010 535 1995 02 DS01 ...
Page 211: ......