FUNKEN FRV 125, Manual

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8
to phase and phase to protective conductor.
Using sine filters prevents high discharge currents, additional
noise and damage to the motor insulation.
Operation in the field-weakening range (above 50 Hz) is
inadvisable.
5.6 Connection diagrams
6 OPERATION
The control unit regulates normal operation of the fan
(switching on and off). During maintenance and inspection
tasks, either the repair switch is used to switch the device on
and off or the connection cable in the terminal box is discon-
nected and isolated.
Check that the fan is working correctly on a daily basis, giving
particular attention to smooth running and noise generation.
6.1 Decommissioning
Switch the fan off using the control unit.
The radial fan itself either has a repair switch or a terminal
box. The fan is deactivated by setting the repair switch to the
“0” position or by disconnecting the motor connection cable
in the terminal box.
MORTAL DANGER FROM ELECTRICAL CURRENT!
If disconnecting in the terminal box, the power
supply must be switched off via the control unit
and secured against reactivation before disconnecting the
connecting cable of the drive motor.
To prevent the fan from being unintentionally reactivated via
the control unit,
•
set the repair switch to “0” or
•
disconnect and isolate the motor cable in the terminal box.
Subsequently, close the terminal box.
Both methods disconnect the motor unit from the electrical
connection.
6.2 Re-initialising the device after maintenance
or repair tasks
Before re-initialising the device, it is vital to conduct a safety
inspection in line with chapter 4.1 “Safety inspections”.
CAUTION! FLYING PARTS! Wear safety goggles!
•
After completing the maintenance and repair tasks, set
the radial fan back into operation using the repair switch
(“I” position).
•
If the fan has a terminal box, reconnect the terminal wir-
ing. Before wiring, check again that the power supply has
been switched off via the control unit.
7 MAINTENANCE TASKS AND
TROUBLESHOOTING
Only specialist staff trained in electronics/electrical
engineering/mechanics must perform mainte-
nance tasks in compliance with these operating
instructions, the servicing instructions and the
applicable regulations.
Three-phase AC
(3 x 400 V)
Squirrel cage motor
3 x 400 Y
Three-phase AC
(3 x 230 V)
Squirrel cage motor
3 x 230 ∆
u1
v1
w1
w2
u2
v2
u1
v1
w1
w2
u2
v2