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Ecowatt
Drive K320 series
®
B.1 What this chapter contains
This chapter describes the technical data of the VFD and its compliance to CE and other
quality certification systems.
B.2 Derated application
B.2.1 Capacity
Choose a VFD model based on the rated current and power of the motor. To ensure the rated
power of the motor, the rated output current of the VFD must be greater 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 protect 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.
B.2.2 Derating
If the ambient temperature on the site where the VFD is installed exceeds 40°C, the altitude
exceeds 1000 m, a cover with heat dissipation vents is used, or the carrier frequency is higher
than the recommended, the VFD needs to be derated.
B.2.2.1. 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.
Note: It is not recommended to use the VFD at a temperature higher than 50°C. If you do, you
shall be held accountable for the consequences caused.
Appendix B Technical data
Derating coefficient (%)
100
90
80
60
40
20
-10
0
10
20
-334-
Temperature (℃)
30
40
50
Technical data
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