CHINSC ELECTRIC SVF-G7 Series, Руководство по эксплуатации

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Chapter2 Specifications and Selection SVF-G7 Series Frequency Inverter Operation Manual
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When selecting the frequency inverter, firstly, you must not only be clear
on the technical requirements the system to the frequency inverter, the
using situations, the specific load characteristics, but also take other
factors such as adapter motor, output voltage and rated output current into
consideration, then you can select the models which meet your requirements
and make sure the mode of operation.
Basic principles: the motor rated load current must not exceed the rated
current of the frequency inverter. Generally, choose according to the
matched motor capacity stipulated by the instructions, please pay attention
to compare the rated current of the motor and the frequency inverter. The
overload capacity of the inverter is designed aimed at the short time
overload in the process of starting and braking process. For constant torque
load or the applications where the load is a little heavies, if there is
overload situation in the process of running, it will exceed the output
ability of the frequency inverter, so please consider to amplify a grade.
Fan and water pump : Fan and water pump types have lower requirements in
the overload ability. The load torque is proportional to the square of the
speed, so the inverter which running at the low speed has a light load (except
for the Roots blower), and because this kind of load has no special
requirements on the rotate speed accuracy, the P-type can be choosed.