SIEMENS
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Siemens D 35 · 2017
5
SINAMICS G120P Cabinet, converter cabinet units
SINAMICS G120P Cabinet, 75 kW to 630 kW
SINAMICS G120P Cabinet
■
Characteristic curves
Derating data
SINAMICS G120P Cabinet units and the associated system
components are rated for an ambient temperature of 40 °C
(104 °F) and installation altitudes up to 1000 m (3281 ft) above
sea level.
At ambient temperatures of > 40 °C (104 °F), the output current
must be reduced. Ambient temperatures above 50 °C (122 °F)
are not permissible.
At installation altitudes > 1000 m (3281 ft) above sea level, it
must be taken into account that the air pressure, and therefore
air density, decreases as the height increases. As a conse-
quence, the cooling efficiency and the insulation capacity of the
air also decrease.
Due to the reduced cooling efficiency, it is necessary, on the one
hand, to reduce the ambient temperature, and on the other
hand, to lower heat loss in the converter cabinet unit by reducing
the output current.
As additional measure for installation altitudes from 2000 m
(6562 ft) up to 4000 m (13123 ft), an isolating transformer is
required in order to reduce transient overvoltages according to
EN 60664-1.
Automatic adjustment of pulse frequency for converter cabinet
units from frame size GX onwards
In the factory setting, the drive starts with a pulse frequency of
4 kHz and reduces the pulse frequency automatically to the as-
sociated required frequencies when loaded. When the load de-
creases, the pulse frequency is increased automatically up to
4 kHz. The values of the rated current apply to a pulse frequency
of 2 kHz and an ambient temperature of 40 °C (104 °F) and are
reached at any time by the automatic adaptation of the output
pulse frequency.
Current derating as a function of the installation altitude and the
ambient temperature
At installation altitudes above 1000 m (3281 ft), the permissible
output current can be compensated to a certain extent using the
ambient temperature.
Current derating as a function of the installation altitude and
the ambient temperature for SINAMICS G120P Cabinet frame
size F, degrees of protection IP20 to IP54
Note:
There is no derating to be considered up to 50 °C at high over-
load (HO) for SINAMICS G120P Cabinet units, frame size F.
see derating data at page 4/50
Current derating as a function of the installation altitude and
the ambient temperature for SINAMICS G120P Cabinet frame
size GX, degrees of protection IP20 to IP54
Current derating as a function of the installation altitude and
the ambient temperature for SINAMICS G120P Cabinet frame
sizes HX and JX, degrees of protection IP20 to IP54
Installation
altitude above
sea level
Current derating factor
(as a percentage of the base load current I
L
)
for an ambient/air intake temperature of
m
(ft)
20 °C
(68 °F)
25 °C
(77 °F)
30 °C
(86 °F)
35 °C
(95 °F)
40 °C
(104 °F)
45 °C
(113 °F)
50 °C
(122 °F)
0 ... 1000
(0 ... 3281)
93 %
85 %
1001 ... 1500
(3284 ... 4921)
100 %
95 %
88 %
81 %
1501 ... 2000
(4925 ... 6562)
97 %
90 %
83 %
2001 ... 2500
(6565 ... 8202)
98 %
91 %
85 %
2501 ... 3000
(8206 ... 9843)
98 %
92 %
86 %
3001 ... 3500
(9846 ... 11483)
98 %
92 %
86 %
3501 ... 4000
(11487 ... 13123)
92 %
86 %
Installation
altitude above
sea level
Current derating factor
(as a percentage of the rated output current)
for an ambient/air intake temperature of
m
(ft)
20 °C
(68 °F)
25 °C
(77 °F)
30 °C
(86 °F)
35 °C
(95 °F)
40 °C
(104 °F)
45 °C
(113 °F)
50 °C
(122 °F)
0 ... 1000
(0 ... 3281)
93 %
85 %
1001 ... 1500
(3284 ... 4921)
96 %
89 %
81 %
1501 ... 2000
(4925 ... 6562)
100 %
99 %
92 %
85 %
2001 ... 2500
(6565 ... 8202)
94 %
88 %
2501 ... 3000
(8206 ... 9843)
96 %
90 %
3001 ... 3500
(9846 ... 11483)
97 %
91 %
3501 ... 4000
(11487 ... 13123)
98 %
92 %
Installation
altitude above
sea level
Current derating factor
(as a percentage of the rated output current)
for an ambient/air intake temperature of
m
(ft)
20 °C
(68 °F)
25 °C
(77 °F)
30 °C
(86 °F)
35 °C
(95 °F)
40 °C
(104 °F)
45 °C
(113 °F)
50 °C
(122 °F)
0 ... 1000
(0 ... 3281)
93 %
85 %
1001 ... 1500
(3284 ... 4921)
97 %
89 %
82 %
1501 ... 2000
(4925 ... 6562)
100 %
97 %
93 %
86 %
2001 ... 2500
(6565 ... 8202)
94 %
90 %
2501 ... 3000
(8206 ... 9843)
90 %
3001 ... 3500
(9846 ... 11483)
96 %
3501 ... 4000
(11487 ... 13123)
98 %
92 %
© Siemens AG 2017