Technical Data Appendix A; What This Chapter Contains; Ratings - Salicru CV50-008-4F User Manual

Technical Data Appendix A

A.1 What this chapter contains
This chapter contains the technical specifications of the inverter, as well as provisions for fulfilling the
requirements for CE and other marks.
A.2 Ratings
A.2.1 Capacity
Inverter 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 inverter must be higher than or equal to the rated motor current. Also the rated
power of the inverter 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 x 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 graph for the actual derating.
A.2.2.2 Altitude derating
The device can output rated power if the installation site is below 1000m. The output power decreases if the
altitude exceeds 1000 meters. Below is the detailed decreasing range of the derating:
A.2.2.3 Carrier frequency derating
For CV50 inverters, different power level corresponds to different carrier frequency range. The rated power of
the inverter is based on the factory carrier frequency, so if it is above the factory value, the inverter needs to
derate 10% for every additional 1 kHz carrier frequency.
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