AFFZP0BB – ACE3 – User Manual Page – 29/139
6 INSTALLATION HINTS
Before starting the inverter, it is necessary to have the required material for a correct
installation. Wrong choice additional parts could lead to failures, misbehaviors or
bad performance.
6.1 Material overview
6.1.1 Connection cables
For the auxiliary circuits use cables with 0.5 mm² section.
For power connections, to the motor and from the battery, use cables with section of
50 mm² or more. Screwing torque for the power connections must be in the 13 - 15
Nm range.
For the optimum inverter performance, the cables from the battery should run side
by side and be as short as possible.
6.1.2 Contactors
Main contactor must always be installed. The output driving the coil is modulated
with a 1 kHz PWM basing on the setting of two parameters (MC VOLTAGE and MC
VOLTAGE RED.). After an initial delay of about 1 second, during which the coil is
driven with a percentage of VBATT set by the MC VOLTAGE parameter, the PWM
reduces the mean voltage down to the percentage set by the MC VOLTAGE RED.
parameter. This feature is useful to decrease the power dissipation of the coil and its
heating.
6.1.3 Fuses
- Use a 10 A fuse for protection of the auxiliary circuits.
- For the protection of the power unit, refer to chapter 10. The fuse value shown is
the maximum allowable. For special applications or requirements these values
can be reduced.
- For safety reasons, we recommend the use of protected fuses in order to
prevent the spreading of particles in case the fuse blows.
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