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6.3
ELECTRICAL WIRING
Personnel requisites: specialized electrician
The equipment must have a mains voltage value as described in the chapter entitled “Technical specifications” (see
chap. 3).
6.3.1 Characteristics of the plug
The plug must have the following specifications:
• three phase machines
- a 3P + N + E, IP 44, 380-415 V industrial plug, suitable for the absorbed current (see “Technical data”) in compliance
with the norm EN 6030-1-2.
• single phase machines
- a P + N + T, IP 44, 230 V industrial plug, suitable for the absorbed current (see “Technical data”) in compliance with
the norm EN 6030-1-2.
6.3.2 Socket Board
Use a Socket Board with the following technical specifications:
Industrial socket with a 3P + N + E, 380-415 V, IP 44 cut-off switch with fuse carrier and fuses, all suitable for the
absorbed current (see “Technical data”) in compliance with the norm EN 6030-1-2.
6.3.3 General specifications for the electrical system
The socket board must be connected above the machine to a system equipped with a differential switch and with earth
systems coordinated according to:
IEC 364-4 art. 413.1, that is to say:
Vc=
Rt*Is<50V
Vc=
contact voltage
Rt=
earth plate resistance
Is=
differential device sensitivity current
If national laws or regulations enforce more restrictive Rt values, these must be complied with.
This equipment can be considered electrically safe only when it has been correctly wired
and an efficient earth system has been installed as foreseen by the safety norms in force.
This fundamental point of safety must be checked and if you are in any doubt, ask for the
system to be accurately checked by professional qualified personnel.
Certain fundamental rules must be followed when using this machine as when using any
electrical machine, such as:
do not touch the equipment with wet or damp hands or feet.
do not place the machine on normally wet floors.
do not use extensions in bathrooms or showers.
do not pull on the supply cable in order to disconnect it from the mains supply.
6.3.4 Electrical wiring
The machine is supplied with a cable already connected to the panel terminal board; so the plug (of the type specified
in point 6.3.1) has only to be connected to the other end of the cable (paragr. 5.1 n
°
1).
Any connections made to lengthen the cable should use a Plug/Socket type in compliance with EN 60309-1-2.
Voltage drop should be checked according to the formula
DV = K*L*I < 4%
where:
V
The machine does not need another earth.
The system earth will be sufficient.
The supply cable should be completely unrolled so that it
is not squashed in any way.
Only for three-phased chambers:
Check the rotation direction of the fan motor inside the
chamber.
The correct rotation direction is shown by the arrow
marked on the motor itself.
DV=
voltage drop
V =
supply voltage
K =
characteristic cable coefficient
L =
cable length
I =
absorbed current
