Siemens SIRIUS 3RW30 Manual page 75

Note
Minimum and maximum configuration of the semiconductor fuses
The fuses for the minimum and maximum configuration are specified in chapter Technical
data (Page 127).
Minimum configuration: The fuse is optimized for the thyristor's I²t value.
If the thyristor is cold (ambient temperature) and the startup process lasts a maximum of 20
s at 3.5 times the rated current of the device, the fuse does not trip.
Maximum configuration: The maximum current permitted for the thyristor can flow without the
fuse tripping.
The maximum configuration is recommended for heavy-duty starting.
NOTICE
Risk of property damage
Type of coordination 1 in accordance with IEC 60947-4-1:
The device is defective following a short-circuit failure and therefore unsuitable for further
use (personnel and equipment must not be put at risk).
Type of coordination 2 in accordance with IEC 60947-4-1:
The device is suitable for further use following a short-circuit failure (personnel and
equipment must not be put at risk).
The type of coordination only refers to soft starters in conjunction with the stipulated
protective device (motor starter protector / fuse), not to additional components in the feeder.
SIRIUS 3RW30 / 3RW40
Manual, 10/2018, NEB535199502000/RS-AB/005
9.4 Soft starter assembly with type of coordination 2
Installation / mounting
75