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3 INSTALLATION
Install the chopper baseplate onto a flat metallic surface that is clean and unpainted.
Apply a thin layer of thermo-conductive grease between the two surfaces to permit
better heat dissipation.
Despite the protection provided against external agents, the continuous attack of
corrosive elements and substances may cause oxidization of connector contacts,
resulting in bad operation. Remember this point when deciding the installation position
on the vehicle.
Fix the chopper using the special holes located on the baseplate.
Verify that the wiring of the cable terminals and connectors has been carried out
correctly. Ensure that suppression devices are fitted to the coils not protected by the
SEM-X itself.
3.1 CONNECTION CABLES
For the auxiliary circuits use cables better or equal to 0.5mm² section.
For power connections to the motor armature and battery use cable of 10mm² section.
For the Field connections use cable of 4mm² section.
For the optimum chopper performance, the cables to the battery should be run side by
side and be as short as possible.
3.2 CONTACTORS
A Line Contactor, designed for Continuous Operation should be installed. This
contactor should be fitted with a coil corresponding to the battery voltage. The current
absorbed by the coil must not be greater than 3A.
Suppression for this contactor coil is within the chopper. Do not use external
suppression. For any Contactor using external suppression, ensure that connections
are made respecting correct polarity.
3.3 FUSES
- Use a 6.3A Fuse for protection of the auxiliary circuits.
- For protection of the power unit, refer to diagrams.. 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
spread of fused particles should the fuse blow.
