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
Summary of Contents for ACH550-UH HVAC
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Page 8: ...1 8 ACH550 UH User s Manual Table of contents ...
Page 32: ...1 32 ACH550 UH User s Manual Installation ...
Page 66: ...1 66 ACH550 UH User s Manual Application macros ...
Page 186: ...1 186 ACH550 UH User s Manual Parameters ...
Page 333: ...ACH550 UH User s Manual 1 333 Technical data ...