13
6 - ELECTRICAL CONNECTIONS
QS1 main isolator switch
PE
protection conductor
Unit top view
Unit front view
serial number
label
n° WIRING DIAGRAM
VOLTAGE
FLA (A)
FLI (kW)
The characteristics of the electrical lines must be determined
by specialized personnel able to design electrical installations;
moreover, the lines must be in conformity with regulations in
force.
The protection devices of the unit power line must be able to
stop the presumed short circuit current, whose value must be
determined in function of system features.
The power cables and the protection cable section must be
defined in accordance with the characteristics of the
protections adopted. All electrical operations should be
performed by trained personnel having the necessary
requirements by the regulations in force and being informed
about the risks relevant to these activities.
Operate in compliance with safety regulations in force .
6.1 PRELIMINARY INFORMATION
The serial number label reports the unit specific electrical
data, included any electrical accessories .
The electrical data indicated in the technical bulletin and in the
manual refer to the standard unit, accessories excluded.
Refer to the electrical data report on the serial number label.
6.2 ELECTRICAL DATA
6.5 ELECTRIC LINES INLET
F.L.A. full load ampere
Full load current at max admissible conditions
F.L.I. Full load input
Full load power input
( at max. admissible condition )
6.3 CONNECTIONS
1. refer to the unit electrical diagram (the number of the
diagram is shown on the serial number label)
2. verify that the network has characteristics conforming to
the data shown on the serial number label
3. Before starting work, verify that the sectioning device at
the start of the unit power line is open, blocked and equip-
ped with cartel warning
4. Primarily you have to realize the earthing connection
5. Shelter the cables using adequate measure fairleads
6.4 SIGNALS / DATA LINES
Do not overpass the maximum power allowed, which varies,
according to the type of signal.
Lay the cables far from power cables or cables having a diffe-
rent tension and that are able to emit electromagnetic distur-
bances.
Do not lay the cable near devices which can generate electro-
magnetic interferences.
Do not lay the cables parallel to other cables; cable crossings
are possible, only if laid at 90°.
Connect the screen to the ground, only if there aren’t distur-
bances
Guarantee the continuity of the screen during the entire exten-
sion of the cable.
Respect impendency, capacity and attenuation indications.
6. Before power the unit, make sure that all the protections
that were removed during the electrical connection work
have been restored.
