Fagor APS-24, Hardware Manual

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   Selection criteria
232
5.
S
E
LECT
ING CRI
T
ERIA
Ca
pacitor modul
e selection
g
uid
e
228
DDS
HARDWARE
Ref.1310
5.5 Capacitor module selection guide
The CM 1.60 is a capacitor module that increases the electrical capaci-
tance of the power bus in 4230 µF. It should be installed on machines with
very short duty cycles (very repetitive accelerations and decelerations)
and with low braking energy (e.g. a punch press).
The following table indicates how much extra energy W is stored in (Ws)
when the bus voltage increases from the rated value VBus to the Ballast
circuit activating voltage (also called Crowbar activation voltage, VCrow-
bar).
Considering the different combinations of power supplies m CM
1.60 and different mains voltage.
with units:
C in Farads
VCrowbar in volts
VBus =
 2·Vmains in volts
W in Ws

jules)
T. H5/15 Extra energy that may be stored (in Ws).
Modules Capac.
(µF)
Crowbar
activation
voltage
(V) Crowbar
deactivation
voltage
(V) W (Ws)
for
Vmains
400 V W (Ws)
for
Vmains
460 V
PS-25B4 820 770 760 111.9 69.6
PS-65A 940 770 760 128.3 79.8
XPS-25 1175 770 760 160.3 99.7
XPS-65 2520 770 760 343.8 213.8
CM 1.60+PS-25B4 5050 770 760 689.1 428.5
CM 1.60+PS-65A 5170 770 760 705.4 438.7
CM 1.60+XPS-25 5405 770 760 737.5 458.6
CM 1.60+XPS-65 6750 770 760 921.0 572.7
W =
2
(Ws)
C [ V² - V²
CROWBAR
BUS
]