User Guide
Table Of Contents
- 3 3RT1 contactors/ 3RH1 control relays
- 3.1 Specifications/regulations/approvals
- 3.2 Device description
- 3.3 Application and areas of use
- 3.3.1 3RT10 contactors with 3 main contacts for switching motors
- 3.3.2 3RT14 contactors with 3 main contacts for switching resistive loads (AC-1)
- 3.3.3 3RT12 Vacuum contactors
- 3.3.4 3RT13 and 3RT15 contactors with 4 main contacts
- 3.3.5 3RT16 capacitor contactors
- 3.3.6 Contactors with an extended operating range
- 3.3.7 3RH1 control relays
- 3.3.8 3RT10 contactor relays for switching motors (interface) and 3RH11 control relays for switching auxiliary circuits
- 3.3.9 3RA13 Contactor combinations for reversing
- 3.3.10 3RT14 Wye-delta combinations
3RT1 contactors/ 3RH1 control relays
SIRIUS System Manual
3-34 GWA 4NEB 430 0999-02 DS 01
Service life The use of the contactors at higher ambient temperatures leads to
increased stress of the plastic material, main circuits and the operating
mechanism. This results in the reduction of the mechanical service life and
time to failure of the contactor. The time to failure is decisively influenced by
the running time.
The following table shows the reduced service life values:
The data given for the time to failure is based on a running time of 100 %. At
a running time of 50 % the values are doubled.
Use of the contactors,
frames sizes S00 to S3
at low
ambient tem-
peratures
The contactors in frame sizes S00 to S3 can be used with a minimum ambi-
ent temperature of Tu ³ -50 °C with up to a 50 % reduction mechanical ser-
vice life.
The other catalog data remains the same.
There are steps that need to be taken against condensation (for example,
control panel heating).
In low ambient temperature applications, high operating frequency and run-
ning time is less critical than low operating frequency and running time.
Contactors that contain electronic components or are combined with elec-
tronic accessories may not be used under Tu = -40 °C
S00 S0 to S3 S00 to S3
Ambient temperature
Tu
Mechanical service life
[x10
6
operations
Time to failure
[years]
≤ 60 °C 30 10 20
65 °C 15 5 15
70 °C 3 1 10
Table 3-13: Service life of the contactor 3RT10