AFCZP0BC – COMBIACX & ACEX - User Manual Page - 11/81
4 INSTALLATION HINTS
In the description of these installation suggestions you will find some boxes of
different colours, they mean:
4 These are informations useful for anyone is working on the installation, or a deeper
examination of the content
U These are Warning boxes, they describe:
- operations that can lead to a failure of the electronic device or can be
dangerous or harmful for the operator;
- items which are important to guarantee system performance and safety
4.1 Material overview
Before starting it is necessary to have the required material for a correct installation.
Otherwise a wrong choice of cables or other parts could lead to failures/
misbehaviour/ bad performances.
4.1.1 Connection cables
For the auxiliary circuits, use cables 0.5mm² section at least.
For power connections to the motor and to the battery, use cables having a
minimum section of 15 mm².
For the optimum inverter performance, the cables to the battery should be run side
by side and be as short as possible.
4.1.2 Contactors
IT IS STRONGLY RECCOMENDED TO USE A MAIN CONTACTOR to connect and
cut off the battery to the controller. Depending on the setting of a parameter in the
controller:
- the output which drives the main contactor coil is on/off (the coil is driven with
the full battery voltage).
- the output which drives the main contactor coil is switched at high frequency (1
kHz) with a programmable duty cycle; this feature is useful to decrease the
power dissipation of the contactor coil.
U The EN1175 states the main Contactor is not mandatory (under proper
conditions); anyway it is recommended to protect the inverter against reverse
battery polarity and to cut off the battery from the power mosfets when a
failure in the three phase bridge occurs.
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