Lenze 7812 - Page 19

ET4 6/ta
checked:19.04.89 MB 33.0831 GB
page: 18
Function code 09
At voltage-treguency (U/t) edge points ot 50 Hz or 60 Hz,
16 different U . characteristics can be entered. Using character -
istlcs 0 and lni~i~e motor is underexcited, whilst characteristics 2
through to 15 allcw tor a voltage increase in the lowerspeed range
with linear voltage-trequency increase.
Umains
lt the U/t edge pointis hlgher than 60 Hz, an underexcitement
of the motor is no langer possible. Then, all characteristics
(0 to 15) have a linear voltage—trequency increase.
00: minimum Umin increase
06: normal Umin increase
15: maximum Umin lncrease
50 or