User Manual

Configuration
11.2 Startup class
SIRIUS 3RW30 / 3RW40
82 Manual, 10/2010, 535199502000 DS 03
11.2.1 Application examples for normal starting (CLASS 10) with 3RW30 and 3RW40
Recommended basic parameter settings
Assuming the conditions and constraints indicated below apply, the size of the soft starters
can be equivalent to the motor rating for a normal starting characteristic (CLASS 10).
You can find a suitable soft starter for the required motor rating based on the required
startup class in chapter Technical data (Page 127).
For typical applications where normal
starting applies as well as recommended parameter
settings for the soft starter, refer to the table below.
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1) Small fan: Mass inertia (centrifugal mass) of fan < 10 x mass inertia of motor
General conditions and constraints
CLASS 10 (normal starting)
3RW30: Maximum ramp-up time 3 s, 300 % starting current, 20 starts / hour
3RW40: Maximum ramp-up time 10 s, 300 % current limiting, 5 starts / hour
ON time 30 %
Standalone assembly
Installation altitude Max. 1000 m / 3280 ft
Ambient temperature kW 40 °C / 104 °F