Vacon 20 - Page 136

105%
Q=(I/I
T
)
2
x(1-e
-t/T
)
I/I
T
Trip area
Motor temperature
Time
Motor te mperature
Time cons tantT
*)
*)
Changes by motor size and
adjusted w
i
th paramet er
Fault
/warning
activation p
o
int
,
if selec ted
with
par.
Motor
current
.1013
.713
130
•
vacon parameter descriptions
9
Figure 9.18: Motor temperature calculation
P13.11 STALL CURRENT
The current can be set to 0.0… 2x I
Nunit
. For a stall stage to occur, the current
must have exceeded this limit. If parameter P1.7 Motor current limit is
changed, this parameter is automatically calculated to 90% of the current lim-
it. See Figure 9.19.
NOTE! In order to guarantee desired operation, this limit must be set below
the current limit.
f
I
Par. P3.9.12
Par. P3.9.14
100K34.fh11
Stall area
Figure 9.19: Stall current