SIEMENS
SINAMICS G150 NEMA
Engineering information
4
Siemens D11.7
(Part 1) – 2013
4/3
Derating data
Current derating as a function of the installation
altitude and ambient temperature
If SINAMICS G150 drives are operated at an installation
altitude >6,600 ft (2,000 m) above sea level, the maximum
permissible output current can be calculated using the
following tables. Note that the enclosure type selected for
the drive must also be taken into account.
Installation altitude
above sea level
Current derating at an ambient temperature of
68°F
(20°C)
77°F
(25°C)
86°F
(30°C)
95°F
(35°C)
104°F
(40°C)
113°F
(45°C)
122°F
(50°C)
0 to 6,600 ft (0 to 2,000 m)
93.3 %
86.7 %
up to 8,250 ft (up to 2,500m)
100%
96.3%
up to 9,900 ft (up to 3,000 m)
98.7%
up to 11,550 ft (up to 3,500 m)
96.3%
up to 13,200 ft (up to 4,000 m)
97.5%
Installation altitude
above sea level
Current derating at an ambient temperature of
68°F
(20°C)
77°F
(25°C)
86°F
(30°C)
95°F
(35°C)
104°F
(40°C)
113°F
(45°C)
122°F
(50°C)
0 to 6,600 ft (0 to 2,000 m)
93.3%
86.7%
80.0%
up to 8,250 ft (up to 2,500m)
100%
96.3%
89.8%
up to 9,900 ft (up to 3,000 m)
98.7%
92.5%
up to 11,550 ft (up to 3,500 m)
94.7%
up to 13,200 ft (up to 4,000 m)
96.3%
90.7%
NEMA 12 ventilated (IP54) enclosure:
Current derating as a function of the ambient (inlet air) temperature and installation altitude.
NEMA 1 (IP21), NEMA 1 filtered (IP23) or IP43 enclosure:
Current derating as a function of the ambient (inlet air) temperature and installation altitude
Installation altitude
above sea level
Max. nominal input voltage
1)
for a rated drive voltage of
380 - 480V
500 - 600V
0 to 6,600 ft (0 to 2,000 m)
480
600
up to 7,450 ft (up to 2,250 m)
466
600
up to 8,250 ft (up to 2,500 m)
451
600
up to 9,100 ft (up to 2,750 m)
437
600
up to 9,900 ft (up to 3,000 m)
423
600
up to 10,750 ft (up to 3,250 m)
408
581
up to 11,550 ft (up to 3,500 m)
394
562
up to 12,400 ft (up to 3,750 m)
379
542
up to 13,200 ft (up to 4,000 m)
365
523
1)
Nominal voltage with tolerance ±10%.
Voltage derating due to altitude is not required if an isolation
transformer is installed upstream of and in close proximity
to the drive as this reduces transient overvoltages in
accordance with IEC 61800-5-1. Please refer to the SINAMICS
Engineering Manual for details of the requirements applicable
to the isolation transformer.
If these requirements are not met, then the supply voltage
must be reduced in accordance with the following table.
Voltage derating as a function of the installation altitude
In addition to current derating, voltage derating may also need to be applied at installation altitudes >6,600 ft (2,000 m)
above sea level.