WEG CFW-10 EASYDRIVE User Manual page 27

CHAPTER 3 - INSTALLATION AND CONNECTION
NOTE!
Do not use the neutral conductor for grounding purposes.
ATTENTION!
The AC input for the inverter supply must have a grounded
neutral conductor.
NOTE!
The AC input voltage must be compatible with the inverter
rated voltage.
The requirements for use of line reactors depends on
several application factors. Refer to Chapter 8.
Capacitors for power factor correction are not required at
the input (L/L1, N/L2, L3) and they must not be connected
at the output (U, V and W).
For the inverters with the rheostatic braking optional, the
braking resistor shall be installed externally. Refer to figure
8.4 for correct braking resistor installation. Size the braking
resistor according to the application and respecting the
maximum admissible current for the braking circuit. Use
twisted pair to connect the braking resistor to the inverter.
Run this cable separately from the signal and control cables.
If the braking resistor is installed inside the inverter panel,
the additional heat dissipated by the resistor shall be
considered when defining the panel ventilation.
When electromagnetic interference (EMI), generated by the
inverter, interfers in the performance of other equipment,
use shielded wires, or install the motor wires in metallic
conduits.Connect one end of the shielding to the inverter
grounding point and the other end to the motor frame.
Always ground the motor frame. Ground the motor in the
panel where the inverter is installed or ground it to the in-
verter. The inverter output wiring must be laid separately
from the input wiring as well as from the control and signal
cables.
The inverter is provided with electronic protection against
motor overload. This protection must be set according to
the specific motor. When the same inverter drives several
motors, use individual overload realays for each motor.
Maintain the electrical continuity of the motor cable shield.
If a disconnecting switch or a contactor is inserted in the
motor supply line, do not operate them with motor running
or when inverter is enabled.
27