The technical data are for 2/4-pole standard motors. With other pole numbers the invert-
er must be dimensioned onto the motor rated current.
The service life of the frequency inverter with intermediate voltage circuit depends on
the current load of the electrolytic capacitors in the intermediate circuit. The use of mains
chokes can increase the service life of the condensators to a considerable extent, es-
pecially when connecting to „hard“ power systems or when under permanent drive load
(continuous duty). For continuous duty (S1) drives with a medium duty of >60%, KEB
provided the use of mains chokes with a terminal voltage (Uk) of 4%. The term "hard"
power system means that the nodal point power (S
Net
) of the mains is very high (>> 200)
compared to the output rated power of the inverter (S
out
).
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