CAUTION
CAUTION
Installation / mounting
8.6 Capacitors to improve the power factor
SIRIUS 3RW30 / 3RW40
62
Manual, 01/2010, 535 1995-02 DS01
8.6
Capacitors to improve the power factor
If capacitors are to be used to correct the power factor, they must be connected on the
device's line side. If an isolating or main contactor is used together with the electronic soft
starter, the capacitors must be disconnected from the soft starter when the contactor is open.
Note
Minimum and maximum configuration of the semiconductor fuses
The fuses for the minimum and maximum configuration are specified in chapter Technical
data [Page 121].
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.
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.
No capacitors must be connected to the output terminals of the soft starter. If so, the soft
starter will be damaged.
Active filters, e.g. for power factor correction, must not be operated parallel to the motor
control device.
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: ......