Goodrive800 Pro Series Inverter Unit Hardware Manual
Technical data
202202 (V1.0)
59
Appendix A
Technical data
A.1
Derated application
A.1.1
Capacity
Choose a VFD model based on the rated current and power of the motor. To endure the rated power of the
motor, the rated output current of the VFD must be larger or equal to the rated current of the motor. The
rated power of the VFD must be higher or equal to that of the motor.
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
If the ambient temperature at the VFD installation site exceeds 40°C, the VFD installation site altitude
exceeds 1000m, a cover with heat dissipation vents is used, or the carrier frequency is higher than the
recommended, the VFD needs to be derated.
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
90
80
60
40
20
Note: It is not recommended to use the VFD at an environment with the temperature higher than 50°C.
If you do, you shall be held accountable for the consequences caused.
A.1.2.2
Derating due to altitude
When the altitude of the site where the VFD is installed is lower than 1000 m, 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.