Nx Networks NX series - Manual (Page 8)

8(86) Safety
1
1.3 Earthing and earth fault protection
The NX frequency converter must always be earthed via a conductor connected to the earthing
terminal
.
The earth fault protection inside the frequency converter protects only the converter itself against
earth faults in the motor or the motor cable.
If fault current protective switches (e.g. RCD or Earth Leakage devices) are to be used in
conjunction with the frequency converter, they must be tested with earth fault currents that are
possible to arise in fault situations.
1.4 Running the motor
Warning symbols
For your own safety please pay special attention to the instructions marked with the following
symbols:
= Dangerous voltage
WARNING = General warning
MOTOR RUN CHECK LIST
1 Before starting the motor, check that the motor is mounted properly
and ensure that the machine connected to the motor allows the
motor to be started.
2 Set the maximum motor speed (frequency) according to the motor
and the machine connected to it.
3 Before reversing the motor shaft rotation direction make sure that
this can be done safely.
4 Ensure that no power correction capacitors are connected to the
motor cable.
5 Ensure that the motor terminals are not connected to mains
potential.
WARNING