ABB ACS 600 MultiDrive - Connecting DC and PE Busbars

ACS 600 MultiDrive – Technical Data
A-16 ACS 600 MultiDrive
Braking Section Tables
The following tables specify the ratings for the braking sections.
Abbreviations and
Notes
The abbreviations and notes concerning the braking section tables are
listed below.
Heat loss of the braking chopper is one percent of braking power.
The degree of protection for the SAFUR and NBRA-6xx is IP 00. The
SAFUR resistors consist of several resistor elements. The resistance
of one element is 8 ohm.The resistors are built in an metal frame.
The degree protection for the braking section cabinets is IP 21/22/42.
Braking Section
P
br.max
Maximum braking power per section allowed momentarily
R ACA 621 types: the minimum allowed resistance value for the
braking resistor (recommended resistance) per chopper
ACA 622 types: Resistance value for the used resistor per
braking chopper (resistance of one (2 x SAFURxxxxxxx) )
I
max
Peak braking current (d.c.) per chopper
P
cont.
Continuous braking power per section
Duty Cycle (10 s / 60 s)
I
rms
Total rms d.c. current (per chopper) during a period of 10 seconds
with braking power P
br.
P
br.
Short term braking power per section allowed for 10 seconds every
60 seconds
Duty Cycle (1 min / 5 min)
I
rms
Total rms d.c. current (per chopper) during a period of 1 minute
with braking power P
br.
P
br.
Short term braking power per section allowed for one minute every 5
minutes.
Braking current wave form
Example: ACA 622-0640-3
NBRA-659
SAFUR180F460 SAFUR180F460
I
max
I
rms
R
NBRA-659
SAFUR180F460 SAFUR180F460
I
max
I
rms
R
+
-
P
br.max
P
br.
P
cont.
10 s
50 s
P
br.
0
1 min
4 min
P
br.
0
1 min or 10 s
4 min or 50 s
I
max
0
I
rms