3RT1/3RH1 contactors
SIRIUS System Manual
GWA 4NEB 430 0999-02b
3-21
Increasing the power
The ease of expansion is an advantage for configuration. In many applica-
tions there is enough space to insert the contactor with the next higher rat-
ing class and thus increase motor output.
3.3.2 3RT1446 contactors with 3 main contacts for switching resistive loads (AC-1)
Field of application
The 3RT14 46 contactors with 3 main contacts for switching resistive loads
are used for applications in the AC-1 utilization category:
• Switching of resistive loads such as heating systems or resistance fur-
naces
• Applications in which a low switching capacity is sufficient
• Applications in which high continuous currents occur without peaks (e.g.
as a generator contactor or in the case of variable-speed drives.
Switching capacity
1.5 times the I
e
/AC-1 can be switched on and off. Switching off higher cur-
rents, with the emergency stop, for example, is possible up to 8 times the
I
e
/AC-3 current.
Comparison: 3RT1046/
3RT1446
The following table shows you the difference between the 3RT1446 and
3RT1046 contactors for normal AC-3 applications:
Table 3-10: Comparison between the 3RT1446 and 3RT1046 contactors
Note on configuration
The 3RT10 range of contactors for switching motors also has a specific AC-1
switching capacity. It is much less costly, however, to use the AC-1 contac-
tor 3RT14 for this specific purpose.
Accessories
You can use the same accessories for the 3RT14 contactors as you can for
the 3RT104 contactors in frame size S3.
Contact material Conducting paths
3RT1446
Contact material with high
current-carrying capacity and
better thermal properties
Larger conducting paths that
permit better cooling
3RT1046
Contact material that ensures
better switching capacity
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