Derating; Current Derating; C.12 Derating - Siemens SINAMICS G180 Installation And Operating Instructions Manual

Table C-5 Threshold values for fan control system
Actual value in inverter
T-CPU
T-heats. max./T-KK-N max
T-thr.-M max/T-thr.-N max
T-Diff. max/T-DIFF_N max
C.12

Derating

C.12.1

Current derating

The devices and the associated system components are rated for an ambient temperature of
40 °C and installation altitudes of up to 1000 m above sea level.
The following tables specify the permissible output currents as a function of the installation
altitude and ambient temperature.
Note also the information in section "Voltage derating" (Page 183).
Table C-6 Current derating for air-cooled inverters
Installation Current derating factor in % of rated current
altitude above
20 °C
sea level in m
0 ... 1000 100 %
1001 ... 1500 100 %
1501 ... 2000 100 %
2001 ... 2500 100 %
2)
2501 ... 3000 95.3 %
2)
3001 ... 3500 89.8 %
2)3)
3501 ... 4000 84.4 %
2)3)
4001 ... 4500 78.9 %
2)3)
4501 ... 5000 73.5 %
2)3)
Permissible only for compact units that are not installed in a cabinet
1)
Voltage derating must also be implemented for compact units at an installation altitude of > 2000 m.
2)
Voltage derating must also be implemented for cabinet units at an installation altitude of > 3000 m.
3)
The following current derating values apply to water-cooled inverters. Refer to the technical
data sheet or the CD supplied with the product for the maximum water inlet temperature.
Installation and operating instructions Sinamics G180
Operating Instructions, 05/2013, 4BS0751-001
Fans OFF or SLOW
≤ 50 °C
≤ 40 °C
≤ 40°C
Air: ≤ 5 °C, water: ≤ 7 °C
25 °C 30 °C
100 % 100 %
100 % 100 %
100 % 99.4 %
97.7 % 93.2 %
91.2 % 87.0 %
86.0 % 82.0 %
80.8 % 77.0 %
75.6 % 72.1 %
70.4 % 67.1 %
35 °C 40 °C
100 % 100 %
100 % 94.4 %
94.3 % 88.9 %
88.4 % 83.3 %
82.5 % 77.8 %
77.8 % 73.3 %
73.1 % 68.9 %
68.4 % 64.4 %
63.6 % 60.0 %
Fans FAST
≥ 55 °C
≥ 50 °C
≥ 45 °C
Air: ≥ 7 °C, water: ≥ 9 °C
45 °C 50 °C
87.5 % 75.0 %
82.6 % 70.8 %
77.8 % 66.7 %
72.9 % 62.5 %
68.1 % 58.3 %
64.2 % 55.0 %
60.3 % 51.7 %
56.4 % 48.3 %
52.5 % 45.0 %
Technical data

C.12 Derating

55 °C
1)
62.5 %
59.0 %
55.6 %
52.1 %
48.6 %
45.8 %
43.1 %
40.3 %
37.5 %
181