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4.4. Electrical connections
It is advisable to keep the air filter in operation during the entire work shift, in order to avoid frequent starting and
stopping. In this way the air filter ensures the best performance and is not subject to unnecessary and
detrimental thermal and mechanical stress.
Warning! Danger!
Before making the electrical connection of the air filter cut off the power supply (main switch). Exclusively qualified
electricians must carry out all operations.
A power supply automatic cut off must be used as the protection system from indirect contact (refer to the norm EN
60204-1 and 1998-04; For this reason the oilmist filter must be equipped with an equipotent protection circuit that
must include a protection switch to avoid problems in case of power supply failure as. Refer to the requirements
indicated in 413.1 of the publication IEC 60364-4-41
The
DARWIN
air filter in its STANDARD configuration is supplied with power cable and multi-polar plug and socket. The last
one simplifies the disassembling operations of the rear filter during regular maintenance operations.
As accessory a Stop/running switch is available on request.
It is advisable to protect the electric motor of the air filter by using a magneto thermal switch.
Note!
For Darwin 3000 with 60 Hz motor, the protection is:
a)
a thermal switch for 3 ÷ 12 A with cycle time 20 seconds
b)
a magnetic switch for 8 A running current.
•
Check that the connection voltage indicated on the test sheet on the unit corresponds to that of the power supply
network.
•
Read the motor plate information to select the correct connection materials (cable section, fuses, magneto thermal
switch, etc.)
•
Make the electrical connection from the electric switchboard of the machine tool to the DARWIN power cables (see
drawing 6) inserting the multi-polar socket/plug. This will speed up and facilitate future maintenance operations.
•
Assemble the chosen motor protection device inside the machine tool switch-board (magneto thermal switch for starting
the motors).
•
Electrical connections must be carried out as illustrated in drawing 6 and, in any case, in compliance with applicable
norms in order to carry out a professional installation.
•
Start up the air filter, following the applicable safety regulations.
•
Check through the suction mouth that the direction of rotation of the air filter rotor corresponds to that indicated by the
arrow-label (the rotor must rotate in a clockwise direction).
•
Should the direction of rotation be contrary to that indicated in the arrow, invert the connection between the two phases.
•
Check that the motor-protector switch calibration complies with the power absorption characteristics of the motor
indicated on the motor plate.
Drawing 6:
Electrical connection
EN
