Functions
5.3 Motor protection / intrinsic device protection (3RW40 only)
SIRIUS 3RW30 / 3RW40
34
Manual, 01/2010, 535 1995-02 DS01
Figure
WARNING
5-6
3RW40 wiring fault with 3RV
For further information, refer to the operating instructions, Order No. 3ZX1012-0RW40-1CA1
(
http://support.automation.siemens.com/WW/view/de/22809303
Trip class (electronic overload protection)
The trip class (CLASS) specifies the maximum time within which a protective device must trip
from a cold state at 7.2 x the rated operational current (motor protection to IEC 60947). The
tripping characteristics represent this time as a function of the tripping current (refer to
chapter Motor protection tripping characteristics for 3RW40 (with symmetry) [Page 161]).
You can set different CLASS characteristics according to the startup class.
Recovery time (motor overload protection)
A recovery time of 60 seconds, during which the motor cools down and cannot be restarted,
starts if the thermal motor model is tripped.
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Danger of death or serious injury.
The 3RW40 is not suitable for installation in hazardous areas. The device is only allowed to
be installed in a control cabinet with the IP4x degree of protection. Appropriate measures
(e.g. encapsulation) must be taken if it is to be installed in a hazardous area.
Note
The rated data of the soft starters refers to normal starting (CLASS 10). The starters may
need to be calculated with a size allowance for heavy-duty starting (> CLASS 10). You can
only set a rated motor current that is lower than the soft starter rated current (for the
permissible settings, refer to chapter Technical data [Page 121]).
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: ......