ABB ACQ550-x1-06A6-2 - Page 286

286 ACQ550-U1 User’s Manual
Technical data
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
MAX
), minimum braking time
OFF (OFF
MIN
) and load type (deceleration or overhauling load).
• Calculate duty cycle:
• In the appropriate table, find the column that best matches your data:
–ON
MAX
< column specification and
– 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
ACQ550-
01/U1-
see below
Resistance Resistor
1
minimum continuous power rating
Deceleration-to-zero rating
P
rcont
Continuous ON
> 60 s ON
> 25% Duty
R
MAX
R
MIN
P
r3
< 3 s ON
>
27 s OFF
<
10% Duty
P
r10
< 10 s ON
>
50 s OFF
<
17% Duty
P
r30
< 30 s ON
>
180 s OFF
<
14% Duty
P
r60
< 60 s ON
>
180 s OFF
<
25% Duty
ohm ohm W W W W W
Three-phase supply voltage, 208…240 V
-04A6-2 234 80 45 80 120 200 1100
-06A6-2 160 80 65 120 175 280 1500
-07A5-2 117 44 85 160 235 390 2200
-012A-2 80 44 125 235 345 570 3000
-017A-2 48 44 210 390 575 950 4000
-024A-2 32 30 315 590 860 1425 5500
-031A-2 23 22 430 800 1175 1940 7500
1
Resistor time constant specification must be > 85 seconds.
Time
Power
Deceleration curve
Overhauling load
curve
Time
Temperature
Avg. braking power
during deceleration
Avg. braking power –
overhauling load
x
2x
to zero
Duty cycle =
(ON
MAX
+ OFF
MIN
)
· 100%
ON
MAX