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Les langues disponibles
08.2008
11.1.2
Application
Permissible rated current in %
105
100
95
90
85
80
75
70
65
36
37
38
Supply temperature in °C
Water
20 % Mixture -10 °C
34 % Mixture -20 °C
44 % Mixture -30 °C
Siemens AG
6SE7087-7KN50
SIMOVERT MASTERDRIVES
In application, the same general conditions apply as to standard units
(with air cooling), with the exception of the cooling conditions described
below.
Water is normally used as the cooling medium (see Section "Coolant").
Antifreeze is added only in exceptional cases.
Within a cooling water temperature range of from + 5 °C to + 38 °C, the
unit can be operated at 100% rated current.
If higher cooling water temperatures are necessary, the unit operating
current must be reduced as shown in Figures 11-4 and 11-5 (Curve 1).
This applies only where water is used as the cooling medim (see notes
in Section "Anti-condensation, Antifreeze").
39
40
41
42
Fig. 11-4
Reduction curve applying to installation in IP22 cabinets
Operating Instructions
Derating Curve IP22
1
43
44
45
46
Technical Data
47
48
49
50
11-13
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