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5 Power Modules
5.4 Current reduction/derating
Derating example
5-132
S
Installation altitude: e.g. Puebla, Mexico, 2200 m above sea level
Derating to 83% I
necessary!
N
S
Temperature: e.g. internal temperature of the switchgear cabinet with 45 _C,
no air–conditioner
Derating to 87% I
necessary!
N
S
Power module clock cycle frequency 6SN1123–1AA0–0EA2
X
= 50%: e.g. for a 6.3 kHz spindle application
L
Derating to 68% I
necessary!
N
Result:
Derating for the power unit to:
83% S 87% S 68% [ 50% I
Derating for the line supply infeed to:
83 % S 87% [ 72% I
required!
N
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
required!
N
© Siemens AG 2012 All Rights Reserved
05.08
10.04
05.01
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