SIEMENS
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Siemens D 15.1 · 2017
SINAMICS PERFECT HARMONY GH180
Air-Cooled Drives
Selection and ordering data
2
■
Overview
You can select the right drive type from the following tables. The
corresponding motor data and the article numbers are listed in
these tables. The tables are organized according to the motor
voltages. For the complete technical data of the listed drive
types refer to chapter 3.
In order to select the right SINAMICS PERFECT HARMONY
GH180 drive, please take into consideration the following steps:
Choosing the right cell size
1. Determine the maximum continuous motor current, temporary
overload not included:
• Use the motor full load line current (FLA) if available or use
the following formula to calculate motor current
I
.
Where:
P
motor
_kW = output (in kW)
V
motor
= motor voltage
PF
motor
= motor power factor (= (cos
)
motor
)
motor
= motor efficiency
(keeping in mind: motor service factor if utilized and/or
overload requirements)
• If the motor power factor (
PF
motor
) and efficiency at full load
are not known, then use the following default values:
-
PF
motor
= 0.88
-
motor
= 0.94
for power cells up to 140 A
0.964 for power cells above 140 A
• Factor in the motor service factor (SF) if the application will
make use of it under long term operation. You do so by
multiplying the given/calculated current by the motor SF.
2. Determine the minimum continuous cell current rating:
If the drive is intended to operate within nominal parameters,
the maximum continuous motor current will be the next higher
rated current of the available cells. For the appropriate drive
type, identify the smallest cell available that can provide the
current calculated in the previous paragraph.
3. Factor in any overload requirements:
• For the cell chosen on the previous paragraph, make sure it
can handle the application overload requirements by
checking overload capabilities
(see page 2/6)
.
•
If the overload requirements exceed the output current of the
chosen cell then the next cell size must be selected.
Note:
Please contact the factory or your local Siemens sales represen-
tative for derating calculations, if the drive is intended to operate
outside the nominal conditions such as:
•
High ambient temperatures
•
High altitude installations
•
Very low continuous operating frequencies at high current
•
High frequency operation for high speed motors
•
Applications as starting drive
I
=
P
motor
_kW
3 ×
V
motor
×
PF
motor
×
motor
© Siemens AG 2017