Siemens 6SE7024-1EP85-0AA1 Operating Instructions Manual page 79

05.2005
Derating curves
NOTICE
Siemens AG 6SE7087-2NP85-0AA0
SIMOVERT MASTERDRIVES
Permissible rated input voltage in %
according to VDE 0110 / IEC 664-1
(not required by UL / CSA)
100
75
50
0 1000
Height above sea level in m
Permissible rated current in %
100
90
80
70
60
0 1000
Height above sea level in m
Permissible rated current in %
100
75
50
25
0
0 10 20
Coolant temperature in °C
Fig. 9-1 Derating curves
The derating of the permissible rated current for installation altitudes of
over 1000 m and at ambient temperatures below 45 °C is calculated as
follows:
Total derating = Derating
K = K x K
1 2
It must be borne in mind that total derating must not be greater than 1!
Example: Altitude: 3000 m
Ambient temperature: 35 °C
⇒ Total derating = 0.845 x 1.25 = 1.056 (= 1)
Operating Instructions
2000 3000 4000
2000 3000 4000
30 40 50
x Derating
altitude ambient temperature
Technical Data
Height Derating
[m] factor K
1
1000
1.0
2000
0.9
3000
0.845
4000
0.8
Temp Derating
[°C] factor K
2
50 0.879
45 1.0
40 1.125
35 1.25 *
30 1.375 *
25 1.5 *
*See note
below
K = 0.845
1
K = 1.25
2
9-3