Earthing And Earth Fault Protection; Running The Motor - Vacon NXL series User Manual

8 • vacon
1.3

Earthing and earth fault protection

The Vacon NXL frequency converter must always be earthed with an earthing 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.
Due to the high capacitive currents present in the frequency converter, fault current protective
switches may not function properly. If fault current protective switches are used they must be tested
with the drive 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
=
General warning
WARNING =
Hot surface – Risk of burn
=
HOT SURFACE
MOTOR RUN CHECK LIST
WARNING
1
.
Before starting the motor, check that the motor is mounted properly and
1
ensure that the machine connected to the motor allows the motor to be
started.
Set the maximum motor speed (frequency) according to the motor and
2
the machine connected to it.
Before reversing the motor shaft rotation direction make sure that this
3
can be done safely.
Make sure that no power correction capacitors are connected to the
4
motor cable.
Make sure that the motor terminals are not connected to mains
5
potential.
Telephone: +358-201-2121 • Fax: +358-201-212 205
Safety