Connection To The Mains - Lincoln Electric D350 Series Safety Instruction For Use And Maintenance

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CONNECTION TO THE MAINS

Check that the electrical specifications of the motor match those of the power system (voltage, frequency)
The maximum voltage variation is + or - 10%
The cable section must be adapted to the power and consumption of the motor (allow 4 to 5 A/mm²).
For CE electrical conformity of the fan, the power cabinet containing the padlockable disconnector must be installed less than
one metre away from the fan in a free field.
If that is impossible (fan in enclosure, fan placed outside the building and box inside, fan mounted on the roof or a wall bracket),
it will be necessary to place, less than a metre (1 m) away, a padlockable disconnecting switch with the appropriate rating,
three-phase for direct starting or with a variable frequency drive, six-phase for star delta starting.
The fan motor must be protected by a thermal magnetic circuit breaker rated for the nominal intensity indicated on the
identification plate of the motor.
Above motor power ratings of 5.5kW, you should use start delta starting for the fan.
230V three-phase system: motor with 230/400V voltages
400V three-phase system: motor with 400/690V voltages
If the motor uses star delta starting, care must be taken to not start it more than 7 times an hour. Otherwise, the contacts of the
motor relays may be destroyed prematurely.
If the fan installation requires a higher starting frequency, a gradual starter or a variable frequency drive should be preferred, to
control the gradual rise in motor intensity and speed.
During the following operations, the electric power supply to the engine must be shut off.
Connect the motor to the electrical system in accordance with the diagram located in the terminal box.
Check the connection of the motor to the ground and the fastening of the lugs.
Make sure that the power cable cannot interfere with or rub against the rotating parts of the fan.
Once all the checks are complete, power and start up the fan.
Check the fan rotation direction and the intensity used by the motor, using a current clamp.
If the intensity measured is greater than that on the motor plate:
The load loss is too weak, the flow too high, normal case of a centrifugal fan (do not make the fan operate when not connected
to its extraction system or filtration unit).
NB:
It is important to make sure that the motor rotation direction is as indicated on the arrow glued to the rear casing of the motor.
Even when it rotates in the opposite direction, a centrifugal fan takes in air, but its motor intensity is greater than it should be, its
air flow performance is not normal and it is far noisier than normal
FIXED FANS
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