Fagor DDS Series Hardware Manual page 224

   Selection criteria
5.
224
DDS
HARDWARE
Ref.1912
· 224 ·
Once the values of Pmx and Pe are calculated, follow these flow charts:
NOTE. If you have external resistor ER+TH-  /  or ER-TH-18/  +FAN,
already discontinued, use this diagram to obtain the Ohm values required
for each power supply.
Pmx >
PS-65A 36kWs / (0.6 s)
= 60 kW
YES
Pmx >
35kWs / (1 s)
PS-25B4
= 35 kW
YES
Pmx >
XPS-25 18kWs / (0.6 s)
= 30 kW
YES
Pmx >
50kWs / (1 s)
XPS-65
= 50 kW
YES
F. H5/12
Selection of the Ballast resistor for the power supplies.
 When using compact drives that integrate the power supply.
MANDATORY. On all compact drives (except those whose model is SCD...-
NR), the external resistor supplied with the units. ACD/SCD/CMC 1.08 /1.15
models are also an exception.
On compact drives "ACD/SCD/CMC 1.08 /1.15", as opposed to the rest of
the compact models, do not install any external Ballast resistor. The internal
one is enough, except on "SCD 1.15" models where it would be possible to
install the internal resistor ER+TH-43/350 if the application so required.
In general, on compact models "ACD/SCD/CMC 1.08/1.15" the internal
dissipation Ballast resistor will be enough, but if it is not in a particular
situation, it is possible to install an external resistor of the same Ohm value
as the internal one and greater dissipation power.
NOTE. Actually, the external resistor provided with the unit is considered
enough for most applications. If it is not enough, install one of the same
Ohm value and greater power.
On any compact drive whose model is SCD...-NR no external Ballast
resistor will supplied with the unit. The user will place the order for the
external resistor required by the application with a FAGOR representative.
NO NO
Pe > 600 W
YES
ER+TH-18/1100//ER+TH-18/1100 or
ER+TH-18/1800//ER+TH-18/1800 or
ER+TH-18/2200//ER+TH-18/2200 or
ER+TH-18/1000+FAN//ER+TH-18/1000+FAN or
ER+TH-18/1500+FAN//ER+TH-18/1500+FAN or
ER+TH-18/2000+FAN//ER+TH-18/2000+FAN
NO NO
Pe > 500 W
YES
ER+TH-18/1100 or
ER+TH-18/1800 or
ER+TH-18/2200 or
ER+TH-18/1000+FAN or
ER+TH-18/1500+FAN or
ER+TH-18/2000+FAN
NO NO
Pe > 520 W
YES
ER+TH-18/1100 or
ER+TH-18/1800 or
ER+TH-18/2200 or
ER+TH-18/1000+FAN or
ER+TH-18/1500+FAN or
ER+TH-18/2000+FAN
NO NO
Pe > 1800 W
YES
ER+TH-18/1100//ER+TH-18/1100 or
ER+TH-18/1800//ER+TH-18/1800 or
ER+TH-18/2200//ER+TH-18/2200 or
ER+TH-18/1000+FAN//ER+TH-18/1000+FAN or
ER+TH-18/1500+FAN//ER+TH-18/1500+FAN or
ER+TH-18/2000+FAN//ER+TH-18/2000+FAN