Lenze EVS9332xP Uživatelský manuál stáhnout pdf (Strana 81)

100

101

Wiring of the standard device

Notes on project planning

Optimisation of the controller and mains load

5.2

5.2.7



5.2−5

EDSVS9332P EN 5.0−07/2013

5.2.7 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:

ƒ Reduced system perturbation: The curved shape of the mains current

approaches a sinusoidal shape.

ƒ Reduced mains current: The effective mains current is reduced, i.e. the

mains, cable, and fuse loads are reduced.

ƒ 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!

ƒ Some controllers must generally be operated with a mains

choke or a mains filter.

ƒ If a mains choke or a mains filter is used, the maximum

possible output voltage does not reach the value of the mains

voltage (typical voltage drop at the rated point 4 ... 6 %).

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