Honeywell SmartDrive Compact User Manual page 63

9
62
If the motor's t6-time (t6 is the time in seconds the motor can safely operate at
six times the rated current) is known (given by the motor manufacturer) the
time constant parameter can be set basing on it. As a rule of thumb, the motor
thermal time constant in minutes equals to 2xt6. If the drive is in stop state the
time constant is internally increased to three times the set parameter value.
See also Figure 9.12.
Motor temperature
105%
Motor
current
I/I
T
Figure 9.12: Motor temperature calculation
9.11 M
OTOR
Motor phase supervision of the motor ensures that the motor phases have an
approximately equal current.
Settings for P9.11, range 0-2:
Activation
Mode
0
1
2
Parameter Descriptions
Trip area
Motor temperature
*)
P S
HASE UPERVISION
No response
Warning
Fault, stop mode after fault according to ID506 (P2.3 stop func-
tion)
*)
Time constant T
Q = (I/I T ) 2 x (1-e -t/T )
Changes by motor size and
adjusted with parameter 9.10
Description
Honeywell
Fault/warning
par. 9.7
Time