6 optimisation of the controller and mains load, Optimisation of the controller and mains load – Lenze E82xVxxxKxxxxx User Manual
Page 103
Electrical installation
Notes on project planning
Optimisation of the controller and mains load
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103
EDS82EV903 EN 3.0
6.2.6
Optimisation of the controller and mains load
A mains choke is an inductance which can be included in the mains cable of the frequency
inverter. As a result, the load of the supplying mains and the controller is optimised:
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Reduced system perturbation: The curved shape of the mains current approaches a
sinusoidal shape.
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Reduced mains current: The effective mains current is reduced, i.e. the mains, cable,
and fuse loads are reduced.
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Increased service life of the controller: The electrolytic capacitors in the DC bus have
a considerably increased service life due to the reduced AC current load.
There are no restrictions for the combinations of mains chokes and RFI filters and/or motor
filters. Alternatively, a mains filter can be used (combination of mains choke and RFI filter
in a common housing).
)
Note!
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Some controllers must generally be operated with a mains choke or a mains
filter.
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Some controller variants have a factory−set RFI filter (EMC filter) or mains
filter. Additional mains chokes or filters must not be used in conjunction
with a mains filter.
ƒ
During operation with a mains choke or a mains filter, the maximally
possible output voltage does not reach the mains voltage value (typical
voltage drop at the rated point: 4 ... 6 %).