Vacon NXI Series - Earthing and Earth Fault Protection

8 • vacon SAFETY
Puhelin: 0201-2121 • Fax: 0201-212 205
1
1.3 Earthing and earth fault protection
The Vacon NX inverter must always be earthed with an earthing conductor connected to the earthing
terminal.
The earth fault protection inside the inverter only protects the inverter against earth faults in the
motor or the motor cable.
Due to the high capacitive currents present in the inverter, fault current protective switches may not
function properly. If fault current protective switches are used, they need to be tested with earth
fault currents present during possible 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
HOT SURFACE
= Hot surface – Risk of burn
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, make sure that this can be done safely.
4
Make sure that no power correction capacitors are connected to the
motor cable.
5
Make sure that the motor terminals are not connected to mains
potential.
WARNING