TREND NX Variable Speed Drives - Manual (Page 25)

8 • vacon SAFETY
Tel. +358 (0)201 2121 • Fax +358 (0)201 212 205
1
1.3
Earthing and earth fault protection
The Vacon NX 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. 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 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