Sensor For The Ambient And/Or Air Intake Temperature - Siemens SINAMICS DCM Operating Instructions Manual
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Also See for SINAMICS DCM:
- List manual (1205 pages) ,
- Operating instructions manual (715 pages) ,
- Manual (705 pages)
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Descriptions of functions
10.21 Sensor for the ambient and/or air intake temperature
10.21
Sensor for the ambient and/or air intake temperature
For SINAMICS DC MASTER a sensor for the ambient and/or air intake temperature is
available as option (order code L15, see the ordering data for options and accessories in
Chapter 2). The sensor is mounted in the cooling air intake of the unit.
Please note that when ordering SINAMICS DCM, it is only possible to subsequently retrofit a
sensor in the manufacturer's factory.
● The temperature sensor is indicated as being available at r52049[1].
● The measured temperature is available at r52050[1] and at r50013[1]. For example for
● The derating (see Chapter Derating (Page 67)) is automatically adapted to the measured
Commissioning
If option L15 is being used, at p50077 the derating factor for the power reduction as result of
increased installation altitude (K2 according to the following table) must be set and not the
derating factor according to the tables in Chapter Derating (Page 67).
Installation altitude
1000 m
2000 m
3000 m
4000 m
5000 m
Function
● Calculating the derating factor
● Monitoring the air intake temperature
444
– evaluation with "free function blocks" or "DCC charts" or
– transfer to a higher-level automation system via fieldbus (PROFIBUS/PROFINET)
air intake temperature.
Effective derating factor K = K1×K2
K1 = derating as a result of increased air intake temperature
K2 = derating as a result of increased installation altitude (see the table above)
K1 is continually calculated, taking into account the measured air intake temperature
(limited to max. 1.0) and used instead of parameter p50077 to generate the current limit
r52130, see the function diagram 8042 in the SINAMICS DCM List Manual.
For self-ventilated (self-cooling, cooling type AN) units, the following applies:
Alarm threshold = 52 °C
Fault threshold = 57 °C
For force-ventilated (with forced air cooling, type AF) units, the following applies:
Alarm threshold = 47 °C
Fault threshold = 52 °C
Derating factor K2
1,0
0,835
0,74
0,71
0,67
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
SINAMICS DCM DC Converter
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