2 - Fagor Automation

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Ohm values
WARNING. The Ohm value of the external Ballast resistor must be the
same as that of the internal resistor of that module.
See the tables in section "resistor modules" of chapter 4 that show the
compact drives and the possible external Ballast resistors associated with
them.
MANDATORY. On all compact drives (except those whose reference is
SCD-NR x.xx), 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/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 reference is SCD-NR x.xx 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.
Remember that it must have the same Ohm value as the internal resistor
of the module.
Heat dissipation
The external Ballast resistors can generate a great deal of heat. That's why,
sometimes, depending on the temperature of the installation area, it may be
necessary to evacuate the heat by means of fans.
INFORMATION. If a fan is required due the conditions of the location
where the resistor will be installed, remember that Fagor Automation offers
external ballast resistors with fan.
See an example with data on the temperatures reached in points of the
top of the module and the effect of the fan:
T. H8/3 Temperatures reached in the points defined earlier in the figure F.
H8/18. *Temperature variation due to the effect of the fan (PAPST
614). Temperature in °C (conversion: °F = 32 + 1.8 °C).
Dissipated power (W) 734 896 1042 1400 1400 *
Ambient temperature (°C) 25 22 24 24 24
T1 (°C) 90 89 115 138 74
T2 (°C) 157 170 185 217 113
T3 (°C) 80 79 88 104 64
T4 (°C) 60 68 72 82 46
T5 (°C) 50 54 57 65 47
T6 (°C) 40 40 44 45 44
Installation
INSTALLATION
Connection between modules 8.
DDS
HARDWARE
Ref.1209
289