14/10/13 Messa a
Terra_EN.indd
ENGLISH
ENGLISH
REV
.0-10/16
EARTHING KIT
EARTHING KIT WITHOUT GROUND FAULT INTERRUPTER
The protection against electric shock from contact indirect is
ensured by the “electrical separation” with equipotential bonding
between all the exposed conductive parts of the generating set.
The generating set is
NOT
equipped with a earth leakage circuit
breaker because its windings are not connected to ground,
hence the machine should
NOT
be intentionally connected to
a grounding circuit.
The limitation of the extension of the electric circuit is very
important for safety, do not power supply to electric plants with
a length greater than 200 meters.
It is important that the power cords of the equipment are equip-
ped with the protective conductor, yellow-green cable, in order
to ensure the connection between the exposed conductive parts
of the generating set and the equipment; this provision does not
apply to the class II equipment (double insulation or reinforced
insulation) recognizable by the symbol .
The cables must be suitable environment in which it operates.
It should be noted that with temperatures below 5°C PVC cables
become stiff and PVC insulation tends to cut to the first fold.
The protection by electrical separation is
NOT
suitable if the
machine is destined to supply power complex plants or located
in special environments with greater risk of electric shock.
In these cases it is necessary to adopt security measures
electricity provided by law.
For EXAMPLE, you can install a GFI (Ground Fault Interrupter
or Earth Leakage Circuit Breaker) high sensitivity 30mA, and
grounding the Neutral of the generating set: this operation
must be performed by a qualified electrician or at a authorized
service provider.
The grounding of the generating set is now mandatory to ensure
protection against indirect contact by means of the GFI.
Connect the generating set to an earthing system via a cable
certain efficiency using the ground terminal (12) on the machine.
EARTHING KIT WITH GROUND FAULT INTERRUPTER
The grounding connection to an earthed installation
is obliga-
tory
for all models equipped with a differential switch (circuit
breaker). In these groups the generator star point is generally
connected to the machine’s earthing; by employing the TN or TT
distribution system, the differential switch guarantees protection
against indirect contacts.
In the case of powering complex installations requiring or em-
ploying additional electrical protection devices, the coordination
between the protection devices must be verified.
For the grounding connection, use the terminal (12); comply
to local and/or current regulations in force for electrical instal-
lations and safety
EARTHING KIT WITH ISOMETER
Machines equipped with insulation resistance monitor allow
intentionally not to connect the ground terminal PE (12) to an
earthing system.
Located on the front of the machine the insulation resistance
monitor has the function of continuously monitoring the ground
insulation of live parts.
If the insulation resistance falls below the pre-set fault value,
the insulation resistance monitor will interrupt the supply of the
connected equipment.
It is important that the power cords of the devices are provided
with the green-yellow circuit protective conductor, so as to en-
sure the bonding among all the grounds of the equipment and
the ground of the machine; the latter provision does not apply
to equipment with double insulation or reinforced insulation.
NOTE:
it is possible to connect the PE terminal (12) to an
own ground connection. In this case an IT earthing system is
accomplished, this means with the active parts isolated from
earth and the equipment cases grounded.
In this case, the insulation resistance monitor checks the insula-
tion resistance of the active parts both towards case and ground,
for example, the insulation towards ground of the power cables.
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