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KESS Power Solutions Gmbh / www.kess.at / info@kess.at
follow all instructions regarding the installation of a single device or a system in
parallel. for fuse boxes or external manual bypass boxes:
•
The installation must have at least one short-circuit protection on the UPS’s
power supply line.
• It is advisable to have an external manual bypass box fi tted with input, output
and manual bypass protections in single systems.
•
for parallel systems it is essential to have a fuse box or manual bypass box.
The circuit breaker of the box must be able to isolate a UPS from the system
in the case of a fault and power the loads with the others, either during a
preventative maintenance or during breakdown and repair actions.
•
on request, we can supply an external manual bypass box for a single device
or parallel system.
•
for longer lengths correct the cross sections to avoid voltage drops. Always
respect the regulations or standards corresponding to your country.
• For each confi guration the information „n“ for parallel systems and backfeed
protection characteristics are available.
•
for parallel systems the length and cross section of the cables, that run
from the fuse box or manual bypass box to each UPS and from there to the
corresponding box, must be the same without any exception.
•
The cross section of the cables must always be considered in relation to the size
of the terminals and switches, so that the cables with their entire cross section
are correctly fastened for an optimum contact between the two elements.
•
The rated currents are printed on the nameplate of the equipment as
indicated by the EN-iEC 62040-1 safety standard. for the calculation of the
input current the power factor and the equipment‘s own performance have
been considered.
•
overload conditions are considered a non-permanent and exceptional
working mode. Thus they are not considered in the application of the
protections. do not connect devices which may overload the UPS and its
terminals and/or outlets, such as motors.
•
if peripheral input, output (f.i. transformators) or bypass elements are added
to the UPS or to a parallel system, the currents indicated on the nameplates
must be considered in any means to use the appropriate cross sections, in
compliance with local and/or national low voltage electrotechnical
regulations.
•
when a galvanic isolation transformer is added to a UPS or a parallel system (as
an optional extra or as an interpendent device) on the input line, at the output
or both, it must be fi tted with protection against indirect contact (differential
circuit breaker) at the output of each transformer. due to its own isolation
properties, it will prevent the tripping of the protections placed on the primary
of the isolation transformer in case of electric shock on the secondary (output
of the isolation transformer).