18
to select the suitable cross cable section, by respecting the Local and/or National Low Voltage
Electro technical Regulations.
Regarding the size of the terminals of the built switches in the protection panel, the cross cable
section has to be considered, in order to leave them completely embraced in all its section, in
order to have an optimal contact between both elements
It is compulsory that the line that supplies the stabilizer includes the input protection, which allows
to break it to make the connection tasks with no voltage, otherwise it could mean a danger of the
fitters. It is recommended to equip the installation with a switchgear protection panel, which
besides of the input protection, it has an output protection and manual Bypass switch. The startup
and shutdown operating instructions are described in the user's manual, considering that the
installation is provided with a complete panel like the recommended one. If it is not available omit
the protection or switch maneuvering.
The documentation supplied together with this user's manual, and the information
regarding the «Recommended installation» can be checked. This information shows the wiring
diagram, protection sizes and minimum connecting cross cable sections, attending to the nominal
operating voltage of the equipment. All the values are calculates for a maximum cable length of
30 m between the protection panels, equipment and loads.
1.
For higher lengths correct the cross sections in order to avoid dropping voltages, in
accordance with the particular Regulations or norms of the country.
The size and type of the protection to install will be the stated in the information related
to «Recommended installation», supplied together with this user's manual in the
documentation.
The neutral regimes of the input and output are identical for the servo voltage stabilizers «with no
galvanic isolation».
When, as an option, an equipment incorporates a galvanic isolation transformer, which
can be built in from factory or by your own, either at the input or output of the equipment,
protections for indirect contact must be fitted in (RCD) at the output of each transformer, because
in case of electrical shock in the secondary winding, due to its isolation feature, it will impede the
tripping of the protections located in the primary of the transformer (isolation transformer
output).
We remind you that any isolation transformer fitted in or supplied from factory, has the output
neutral earthed through a cable that joints the neutral an power terminals. If an isolated output
neutral were needed, this cable bridge 27 must be removed, by taking the needed cautions as
regards to the local and/or national regulations.
Switches, breakers and protections must break the NEUTRAL a part from the lines, in case of
installation in IT neutral regime.