Siemens Vector Control - Page 387

05.2006 Technical Data
Siemens AG 6SE7087-2JD60
SIMOVERT MASTERDRIVES Operating Instructions 13-3
The derating of the permissible rated current for installation altitudes of
over 1000 m and at ambient temperatures below 40 °C is calculated as
follows:
Total derating = Derating
altitude
x Derating
ambient temperature
K = K
1
x K
2
It must be borne in mind that total derating must not be greater than 1!
Example: Altitude: 3000 m K
1
= 0.845
Ambient temperature: 35 °C K
2
= 1.125
→ Total derating = 0.845 x 1.125 = 0.95
List of unit options
Unit designation
Year of manufacture
Month of manufacture
Fig. 13-2 Rating plate
NOTE
Rating plate