Measures prior to commissioning
Operating_Manual_Fan_KXE_04_en.docx
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Avoidance of stray currents:
The operating company is responsible for the avoidance of
stray currents. These currents can be harmful to components
of the fan. Stray currents are electric currents which do not
flow through the electrical mains network.
These currents could cause:
- corrosion and pitting
- the development of new magnetic fields
- disruptions of existing magnetic fields
- faults in electrical components (monitoring equipment,
connecting cables, data lines)
Optimum potential equalisation system:
The operating company is responsible for the earthing of all
drive components. Connect all electrical and mechanical
drive components to the system earth.
When using variable speed control, an optimum connection
of the drive components with high-frequency technology
must be additionally established. Use shielded cables for the
connection of variable speed control and motor. Connect the
variable speed control to the system earth with special
cables featuring good high-frequency properties.
Ensure that an optimum potential equalisation exists
throughout the entire drive system. Particular attention must
be afforded here to technically sound connection of the
potential equalisation in the terminal box of the motor.
Perform measurements of the electromagnetic compatibility.
Electric equipment should not interfere with other equipment,
or allow interference from other equipment.
FU Variable speed control
L
Cables with good high-
frequency properties
M
Motor
V
Fan
Fig. 8-11 Drawing of potential equalisation system
