Appendix A
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Appendix A Technical Data
A.1 What this chapter contains
This chapter contains the technical specifications of the VFD, as well as provisions for fulfilling the
requirements for CE and other marks.
A.2 Ratings
A.2.1 Capacity
VFD sizing is based on the rated motor current and power. To achieve the rated motor power
reference in the table, the rated current of the VFD must be higher than or equal to the rated motor
current. Also the rated power of the VFD must be higher than or equal to the rated motor power.
The power ratings are the same regardless of the supply voltage within one voltage range.
Note:
1.
The maximum allowed motor shaft power is limited to 1.5 ·
PN. If the limit is exceeded, motor
torque and current are automatically restricted. The function protects the input bridge of the drive
against overload.
2.
The ratings apply at ambient temperature of 40 °C
3.
It is important to check that in Common DC systems the power flowing through the common DC
connection does not exceed PN.
A.2.2 Derating
The load capacity decreases if the installation site ambient temperature exceeds 40 °C, the altitude
exceeds 1000 meters or the switching frequency is changed from 4 kHz to 8, 12 or 15 kHz.
A.2.2.1 Temperature derating
In the temperature range +40 °C…+50 °C, the rated output current is decreased by 1% for every
additional 1 °C. Refer to the below list for the actual derating.
Derating coefficient (%)
Temperature (
℃
)
-10
0
10
20
30
40
50
100
90
80
60
40
20
A.2.2.2 Altitude derating
When the VFD installation altitude does not exceed 1000 meters, the VFD can run at the rated
power. When the altitude is greater than 1000 meters but less than 3000 meters, derate 1% for
every increased 100 meters. For details about the derating, see the following figure.
