Electrical Installation; Closing The Inverter - WEG CFW-09 User Manual

CHAPTER 8 - CFW-09 OPTIONS AND ACCESSORIES
8.16.3 Electrical
Installation
8.16.4

Closing the Inverter

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The electrical installation is the same as CFW-09 standard. Refer to chapter
3, item 3.2 to make a correct electrical installation.
NOTE!
To assure the NEMA 4X total protection, it is necessary to use correct cables.
It is recommended to use armored multi-core cables. For example, one tetra-
polar armored cable for Power supply (R, S, T) plus grounding, and another
tetra-polar armored cable for output (motor) connection.
The wire sizing and fuses are presented in table 3.5, chapter 3.
Figure 8.57 - Tetra-polar armored cable
The control and power wiring access to the inverter is through the cable glands.
All the cable glands come with a gasket inside. To make the electrical
installation it is necessary to remove the gasket from the cable gland and
then pass the armored multi-core cable in the cable gland.
After doing the electrical connection and arrange the cables properly, tight
the cable glands to assure that the cable is very strongly fastened. The
recommended torque is 2 N.m (0.2 kgf.m).
The control wiring has to be made by armored multi-core cables too. It is
necessary to use this type of cables to guarantee total closing after cable
glands tightening. Check the maximum and minimum diameter of the cables
supported by the Cable Glands in figures 8.55 and 8.56.
To guarantee NEMA 4X degree of protection, it is very important to close
correctly the inverter after doing the electrical installation. Please, follow these
instructions:
After the electrical installation is completed and the cable glands tightened,
close the frontal cover (certify that the flat cable that interconnects the HMI to
the control card is correctly connected) by tightening each screw a little at a
time, until total tightening.
The gaskets provide the protection of the electronic parts of the SHARK inverter.
Any problem with them can cause problems with the protection degree.
Opening and closing the inverter many times reduces the gaskets lifetime. It
is recommended to do this no more than 20 times. If problems are detected
on the gaskets, we recommend changing the failed gasket immediately.
Certify that the door gasket is on its correct position at the moment you will
close the inverter.
Certify that the door screw gaskets are perfect on the moment you are ready
to close the inverter.
All these recommendations are very important to become a successful
installation.