ABB ACQ550-x1-06A6-2 User Manual page 143

ACQ550-U1 User's Manual
Code Description
3713 LOAD FREQ 4
Defines the frequency value of the fourth load curve definition point.
• Must be smaller than 3716
3714 LOAD TORQ LOW 4
Defines the torque value of the fourth underload curve definition point.
• Must be smaller than 3715
3715 LOAD TORQ HIGH 4
Defines the torque value of the fourth overload curve definition point.
3716 LOAD FREQ 5
Defines the frequency value of fifth load curve definition point.
3717 LOAD TORQ LOW 5
Defines the torque value of the fifth underload curve definition point.
• Must be smaller than 3718
3718 LOAD TORQ HIGH 5
Defines the torque value of the fifth overload curve definition point.
Correspondence with the obsolete underload supervision
The now obsolete parameter 3015
curves shown in the figure. The parameter characteristics were as described below.
• If the load drops below the
set curve for longer than
the time set by parameter
3014
(obsolete), the underload
protection is activated.
• Curves 1...3 reach
maximum at the motor
rated frequency set by
parameter 9907
NOM FREQ
• T
M
motor.
• ƒ
N
the motor.
If you want to emulate the behavior of an old underload curve with parameters as in
the shaded columns, set the new parameters as in the white columns in the two
tables below:
Underload supervision with
parameters 3013...3015 (obsolete)
No underload functionality
Underload curve, fault generated
Underload curve, alarm generated
5
LOAD FREQ
4.
LOAD TORQ HIGH
5.
LOAD TORQ HIGH
UNDERLOAD TIME
MOTOR
.
= nominal torque of the
= nominal frequency of
UNDERLOAD CURVE
T
M
(%)
Underload curve types
80
60
40
20
0
Obsolete parameters
3013 3014
UNDERLOAD UNDERLOAD
FUNCTION TIME
0 -
1 t
2 t
provided five selectable
3
2
1
5
4
ƒ
N
New parameters
3701 3702
USER LOAD USER LOAD USER LOAD
C MODE C FUNC
0 -
1 1
1 2
Parameters
143
70%
50%
30%
f
2.4 · ƒ
N
3703
C TIME
-
t
2 · t