ABB ACS550 User Manual page 278

278
Avg. braking power –
overhauling load
Avg. braking power
during deceleration
to zero
The many variables in the last requirement above are most easily dealt with using
the following tables.
• First, determine your maximum braking time ON (ON
OFF (OFF
• Calculate duty cycle:
• In the appropriate table, find the column that best matches your data:
– ON
– Duty cycle < column specification
• Find the row that matches your drive.
• The minimum power rating for deceleration to zero is the value in the selected
row/column.
• For overhauling loads, double the rating in the selected row/column, or use the
"Continuous ON" column.
208...240 V drives
Type code
ACS550-
01/U1-
see below
Three-phase supply voltage, 208...240 V
-04A6-2
-06A6-2
-07A5-2
-012A-2
-017A-2
-024A-2
-031A-2
1
Resistor time constant specification must be > 85 seconds.
Technical data
Power
Temperature
2x
x
) and load type (deceleration or overhauling load).
MIN
ON
MAX
=
Duty cycle
(ON + OFF
MAX
< column specification and
MAX
Resistance
P
r3
< 3 s ON
R R
MAX MIN
> 27 s OFF
< 10% Duty
ohm ohm W
234 80 45
160 80 65
117 44 85
80 44 125
48 44 210
32 30 315
23 22 430
Deceleration curve
MAX
· 100%
)
MIN
1
Resistor minimum continuous power rating
Deceleration-to-zero rating
P P
r10 r30
< 10 s ON < 30 s ON
> 50 s OFF > 180 s OFF
< 17% Duty < 14% Duty
W W
80 120
120 175
160 235
235 345
390 575
590 860
800 1175
ACS550 User's Manual
Overhauling load
curve
Time
Time
), minimum braking time
P
rcont
P Continuous ON
r60
> 60 s ON
< 60 s ON
> 180 s OFF
> 25% Duty
< 25% Duty
W W
200 1100
280 1500
390 2200
570 3000
950 4000
1425 5500
1940 7500