ABB RDNA-01 Manual do Utilizador Página 153

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ACH550-UH User’s Manual 1-149
Parameters
Correspondence with the obsolete underload supervision
The now obsolete parameter 3015
UNDERLOAD CURVE provided five selectable
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
UNDERLOAD TIME
(obsolete), the underload
protection is activated.
Curves 1…3 reach
maximum at the motor
rated frequency set by
parameter 9907
MOTOR
NOM FREQ.
T
M
= nominal torque of the
motor.
•ƒ
N
= nominal frequency of
the motor.
3711 LOAD TORQ LOW 3 0…600% 1% 25%
Defines the torque value of the third underload curve definition point.
Must be smaller than 3712
LOAD TORQ HIGH 3.
3712 LOAD TORQ HIGH 3 0…600% 1% 300%
Defines the torque value of the third overload curve definition point.
3713 LOAD FREQ 4 0…500 Hz 1 Hz 50 Hz
Defines the frequency value of the fourth load curve definition point.
Must be smaller than 3716
LOAD FREQ 5
3714 LOAD TORQ LOW 4 0…600% 1% 30%
Defines the torque value of the fourth underload curve definition point.
Must be smaller than 3715
LOAD TORQ HIGH 4.
3715 LOAD TORQ HIGH 4 0…600% 1% 300%
Defines the torque value of the fourth overload curve definition point.
3716 LOAD FREQ 5 0…500 Hz 1 Hz 500 Hz
Defines the frequency value of fifth load curve definition point.
3717 LOAD TORQ LOW 5 0…600% 1% 30%
Defines the torque value of the fifth underload curve definition point.
Must be smaller than 3718
LOAD TORQ HIGH 5.
3718 LOAD TORQ HIGH 5 0…600% 1% 300%
Defines the torque value of the fifth overload curve definition point.
Group 37: User Load Curve
Code Description Range Resolution Default S
80
60
40
20
0
2.4 · ƒ
N
3
2
1
5
4
T
M
70%
50%
30%
ƒ
N
(%)
Underload curve types
f
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