ABB ACS580 Series, Hardware Manual

Page: 400 / 468

4. Select the resistor so that the following conditions are met:
• The rated power of the resistor must be greater than or equal to P
Rmax
.
• Resistance R must be between R
min
and R
max
given in the table for the used
drive type.
• The resistor must be able to dissipate energy E
Rpulse
during the braking
cycle
T.
Equations for selecting the resistor:
t
on
P
Rmax
P
Rave
T
Eq. 1.
Eq. 2.
Eq. 3.
For conversion, use 1 hp = 746 W.
where
= calculated brake resistor value (ohm). Make sure that: Rmin < R < Rmax. R
= maximum power during the braking cycle (W) PRmax
= average power during the braking cycle (W) PRave
= energy conducted into the resistor during a single braking pulse (J) ERpulse
= length of the braking pulse (s)
ton
= length of the braking cycle (s).
T
The tables below show reference resistor types for the maximum braking power.
IEC
Reference resistor types
PBRmax Rmax Rmin
ACS580-01-…
kW ohm ohm
3-phase Un = 230 V
Danotherm CBR-V 330 D T 406 78R UL 0.7 205 25 04A7-2
Danotherm CBR-V 330 D T 406 78R UL 1.1 130 25 06A7-2
Danotherm CBR-V 560 D HT 406 39R UL 1.5 95 25 07A6-2
Danotherm CBR-V 560 D HT 406 39R UL 3.0 48 25 012A-2
- 4.1 35 25 018A-2
Danotherm CBT-H 560 D HT 406 19R 5.4 26 14 024A-2
Danotherm CBT-H 760 D HT 406 16R 7.4 19 14 032A-2
400 Resistor braking