Siemens 6SE7024-1EP85-0AA1 - Page 79

05.2005 Technical Data
Siemens AG 6SE7087-2NP85-0AA0
SIMOVERT MASTERDRIVES Operating Instructions 9-3
10 30 500
25
50
75
100
0
Coolant temperature in °C
Permissible rated current in %
20 40
1000 2000 3000 40000
75
100
Height above sea level in m
Permissible rated input voltage in %
according to VDE 0110 / IEC 664-1
(not required by UL / CSA)
1000 2000 3000 40000
70
80
90
100
60
Height above sea level in m
Permissible rated current in %
Temp
[°C]
Derating
factor K
2
50 0.879
1.045
1.25 *35
1.12540
Height
[m]
Derating
factor K
1
1000
1.0
0.9
2000
0.8
4000
0.845
3000
1.375 *30
1.5 *
25
50
*See note
below
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
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
= 1.25
⇒ Total derating = 0.845 x 1.25 = 1.056 (= 1)
Derating curves
NOTICE