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5
Electrical connection
5.1
Electrical connection to low voltage network
The machine drive is supplied from the low voltage network.
Caution!
All work on the electrical equipment of this special sewing
machine may only be carried out by qualified electricians or
other appropriately trained persons.
Remove the mains plug before carrying out any work!
According to the selected type the machine drive has a one-phase or
three-phase supply. If the drive has the three-phase supply, it has an
asynchronous motor. In that case it is necessary to adjust the
connection of the coils in the motor terminal board (star or triangle) to
the voltage of the local electric network.
Caution!
The voltage in the electric network must agree with the voltage on the
motor label!
The connection of the coils of the asynchronous motor must
correspond with the voltage in the local network.
The low voltage circuit includes the following items:
–
Supply plug
–
Main switch (with the drive on the machine head the main switch is
incorporated in the drive)
–
Drive
–
Sewing lamp transformer (option)
–
Cables
Part of these items is included in the drive package. The other part is
included in the package of the motor part set obligatorily supplied
with the machine head. The division of the items can be seen in the
parts list.
The low voltage circuit connection will be made according to the
wiring diagram, which is included in the package of the motor part set.
Caution! Risk of electric current injury!
The drives may be operated only with a safety conductor connected
to the functional protective system in accordance with the regulations
and rules to avoid personal injuries by electric current or fire.
The drive operation will become dangerous if the safety conductor
inside or outside the drive is disrupted. The protection must not be
disrupted with e.g. an extension cord without the protective
conductor.
GB
17
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