05.2006 Technical Data
Siemens AG 6SE7087-2JD60
SIMOVERT MASTERDRIVES Operating Instructions 13-15
13.1.2 Application
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 13-4 and 13-5 (Curve 1).
This applies only where water is used as the cooling medim (see notes
in Section "Anti-condensation, Antifreeze").
37 39 4136
90
95
100
105
85
Supply temperature in °C
Permissible rated current in %
38 40
80
75
70
65
42 43 44 45 46 47 48 49 50
Water
20 % Mixture -10 °C
34 % Mixture -20 °C
44 % Mixture -30 °C
1
Derating Curve IP22
Fig. 13-4 Reduction curve applying to installation in IP22 cabinets
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