Siemens Compact PLUS 6SE7024-1EP85-0AA0 Operating Instructions Manual page 79

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