SAFETY
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1
1.3
Earthing and earth fault protection
The Vacon NX Liquid-Cooled frequency converter must always be earthed with an earthing conductor con-
nected to the earthing terminal
. See page 75.
The earth fault protection inside the frequency converter protects only the converter itself against earth
faults in the motor or the motor cable. It is not intended for personal safety.
Due to the high capacitive currents present in the frequency converter, fault current protective switches
may not function properly.
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 it 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) on the frequency converter
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 mo-
tor cable.
5
Make sure that the motor terminals are not connected to mains poten-
tial.
6
Before the NX_W Liquid Cooled drive can be used to control the motor,
the proper functioning of the liquid-cooling system must be ensured.
WARNING