IMO HD2-3.7A-43 - C.4.3 Floor mounting dimensions

HD2 Series Inverter Technical Data
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Appendix B Technical Data
B.1 What this chapter contains
This chapter describes the technical data of the inverter and its compliance to CE and other quality
certification systems.
B.2 Derated application
B.2.1 Capacity
Choose an inverter model based on the rated current and power of the motor. To withstand the rated
power of the motor, the rated output current of the inverter must be larger or equal to the rated current
of the motor. The rated power of the inverter 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 inverter 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.
B.2.2 Derating
If the ambient temperature at the inverter installation site exceeds 40°C, the inverter installation site
altitude exceeds 1000m, a cover with heat dissipation vents is used, or the carrier frequency is higher
than the recommended, the inverter 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.
Derating coefficient (%)
Temperature (℃)
-10 0 10 20 30 40 50
100
90
80
60
40
20
Note: It is not recommended to use the inverter at an environment with the temperature higher than
50°C. If you do, you shall be held accountable for the consequences caused.
B.2.2.2 Derating due to altitude
When the altitude of the site where the inverter is installed is lower than 1000 m, the inverter can run
at the rated power. When the altitude exceeds 1000 m, derate 1% for every additional 100 m. When
the installation site altitude exceeds 3000 m, consult the local IMO dealer or office.