ABB ACH550-UH User Manual page 152

1-148
Code Description
3711 LOAD TORQ LOW 3
Defines the torque value of the third underload curve definition point.
• Must be smaller than 3712
3712 LOAD TORQ HIGH 3
Defines the torque value of the third overload curve definition point.
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.
Parameters
Group 37: User Load Curve
Range
0...600%
3.
LOAD TORQ HIGH
0...600%
0...500 Hz
5
LOAD FREQ
0...600%
4.
LOAD TORQ HIGH
0...600%
0...500 Hz
0...600%
5.
LOAD TORQ HIGH
0...600%
UNDERLOAD TIME
MOTOR
.
= nominal torque of the
= nominal frequency of
Resolution
1%
1%
1 Hz
1%
1%
1 Hz
1%
1%
UNDERLOAD CURVE
T
M
(%)
Underload curve types
80
60
40
20
0
ACH550-UH User's Manual
Default
25%
300%
50 Hz
30%
300%
500 Hz
30%
300%
provided five selectable
3
2
1
5
4
ƒ
N
S
70%
50%
30%
f
2.4 · ƒ
N