14
To determine the parameters for the section switch with interlocking device and the thermo-
magnetic ground-fault circuit interrupter refer to CEI
– IEC and technical regulations in force in
the country where the machine is installed.
The connection plug must be connected to an interlocked socket, capable of providing the
characteristics indicated in section 1.1 of this manual.
Machines with three-phase power supply must be connected to a safety socket, according to
the cyclical sequence of the phases indicated on the label, located close to the end of the power
cable of the machine.
The cyclical sequence of phases of the socket inside the distribution box must be attached with
the sequence indicated on the plate attached to the cable.
The exact combination of the cyclical sequence of phases of the machine with that of the mains
circuit ensures the correct direction of rotation of the motor and avoids the necessity to repeat
connection operations of the plug and excludes any risk of serious damage which may result
from an erroneous connection.
Carry out electrical connection, using the methods described and also using a sequence-meter.
N.B. The earth cable (yellow/green) must be connected to the specific pin marked with the
earth-connection symbol and codes PE as per CEI/IEC standards.
Connection of the power cable to the switch must be carried out, respecting the wiring
configuration indicated in the diagram attached to the power cable itself. The same diagram is
indicated below:
Figure 2
Single-phase
Three-phase
L
L1
L2
L3
N