Goodrive20-UL Series VFD
Technical data
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Appendix A Technical data
A.1 Derated application
A.1.1 Capacity
VFD sizing is based on the rated motor current and power. To achieve the rated motor power
given 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:
The maximum allowable shaft power of the motor is limited to 1.5 times the rated power of
the motor. If the limit is exceeded, the VFD automatically restricts the torque and current of
the motor. This function effectively protects the input shaft against overload.
The rated capacity is the capacity at the ambient temperature of 40°C.
You need to check and ensure that the power flowing through the common DC connection
in the common DC system does not exceed the rated power of the motor.
A.1.2 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.1.2.1 Derating due to temperature
When the temperature ranges from +40°C to +50°C, the rated output current is derated by 1%
for each increased 1°C. For the actual derating, see the following figure.
Derating coefficient (
%)
Temperature (
℃
)
-10
0
10
20
30
40
50
100
80
60
40
20
A.1.2.2 Derating due to altitude
When the altitude of the site where the VFD is installed is lower than 1000m, the VFD can run
at the rated power. When the altitude exceeds 1000m, derate by 1% for every increase of
100m. When the altitude exceeds 3000m, consult the local INVT dealer or office for details.
Summary of Contents for GD20-0R4G-2-UL
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