Installazione 4
13
4.4
Connecting the compressor to the sources of energy and relative inspections.
4.4.1
Connecting the compressor to the electrical mains power supply
The compressor is to be connected to the electrical mains by the customer, to his exclusive
liability, employing specialised personnel and in compliance with the Accident Prevention
Norms EN 60204.
INSTRUCTIONS FOR CONNECTING TO EARTH
This compressor must be connected to earth while in use in order to safeguard the operator against electrical shocks.
The electrical connection must be carried out by a skilled engineer. It is advisable never to dismantle the compressor or
even to make any other connections. All repairs must be carried out exclusively by authorised service centres or other
qualified centres. The earth wire of the power supply cable of the compressor must be connected only and exclusively
to the
PE
pin of the terminal board of the actual compressor. Before replacing the plug of the power supply cable
ensure that the earth wire is connected.
EXTENSION CABLE
Use only extension cables with plug and earth connection. Never use damaged or squashed extension cables. Ensure
that the extension cable is in a good state of wear. When using an extension cable, ensure that the cross section of
the cable is sufficient to convey the current absorbed by the product to be connected.
If the extension cable is too thin there could be drops in voltage and therefore loss in power and overheating of the
equipment.
The extension cable of the three-phase compressors must have a cross section in proportion with its length: see table
below:
CORRECT CROSS SECTION FOR THE MAXIMIM LENGTH OF 20 mt
Power Kw/HP
Rated voltage
Phase
Section
2,2/3 Avv. diretto (D.O.L)
220/240V
1 ph
6 mm²
220/240V
3 ph
4 mm²
380/415V
3 ph
2,5 mm²
Avoid any risk of electric shock. Never use the compressor with a damaged electrical cord
or extension cables. Regularly check the cables. Never use the compressor in or near
water or near a hazardous environment where they can be electric shock.
ELECTRICAL CONNECTION
SINGLE-PHASE
The
compressors
must be installed by a qualified engineer.
The compressors are supplied with cable (1) with plug
“CE” 16A 6h.
THREE-PHASE
The compressors type
L1+L2+L3+N+PE version 380÷415V and L1+L2+L3+PE version 220÷240V
must be
installed by a qualified engineer.
The compressors are supplied with cable without plug.
It is advisable to install the connector, magneto thermal switch and fuses near the compressor (3 m away at the most).
The magneto thermal switch and the fuses must have the characteristics indicated in the table below:
Potenza Kw/HP
Tensione nominale
Magnetotermico
Fusibile
2,2/3 Avv. diretto (D.O.L)
220/240V 1 ph
20 A
25 A
220/240V 3 ph
16 A
20 A
380/415V 3 ph
10 A
16 A
Note!
The fuse parameters indicated in the table above refer to the
gl
type (
standard
). If cartridge fuses type
aM
are
used (
delayed
) the parameters in the table are to be reduced by 20%. The parameters of the magneto thermal
switches refer to switches type
K
.
Ensure that the installed power in kW is at least double the input of the electric motor.
The mains voltage must correspond with that indicated on the electrical data nameplate of the machine; the admitted
tolerance must remain /- 6%.
EXAMPLE
:
Voltage 230V: minimum tolerance 216 Volt, maximum tolerance 244 Volt
Voltage 400V: minimum tolerance 376Volt, maximum tolerance 424 Volt
The plug of the power supply cable must never be used as a switch but must be plugged into a power socket
that is controlled by an adequate differential switch (magneto thermal switch).
Never use the earth connection instead of the neutral. The earth connection must be
achieved according to the EN 60204 industrial safety standards.
Ensure that the mains voltage corresponds with that required for the correct operation of the
compressor.
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