Salicru SLC ADAPT User Manual page 7

4. DESCRIPTION.
The manual bypass is a peripheral option to the UPS, which
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allows selecting the power supply source that feeds the
loads, either from the UPS or directly from commercial elec-
trical mains. If the UPS has an isolation transformer at its
output or in the static bypass line, the manual bypass panel
must incorporate it, in order to make euqal both neutral re-
gimes.
The isolation transformer is an option, which provides gal-
vanic isolation between the primary and secondary wind-
ings, in such way that it attenuates the electrical noises
and transients coming from mains largely, and also they are
transferred to the secondary winding in minor extent.
The type of the manual bypass panel is make before break,
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so it doesn't break the power supply to the loads when
doing the shifting, unless it is operated in different order of
the established one.
In case the panel incorporates the «Backfeed protection»
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contactor, its operating must be considered as automatic
and it doesn't require any attention unless any of the pro-
tection fuses is blown. Do not handle the fuse holder switch
of the «Backfeed protection», unless it is needed to replace
any of these protection parts.
These instructions are generic for each one of the stated
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series in the nomenclature, regardless of the type of panel.
Omit those terminal connections and manoeuvring of the
switches that your unit doesn't have.
4.1. TYPES OF MANUAL BYPASS PANELS.
Structurally, there are two type of manual bypass panels
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according to the own structure of the UPS:
Standard or basic (Fig. 1). With common input for the
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UPS feeding (rectifier-PFC) and the static bypass line.
Input line
Fig. 1. Standard manual bypass connection with the UPS.
USER'S MANUAL
MANUAL BYPASS
PANEL
To loads
IT -option-
UPS
With separate bypass line (Fig. 2). These panels have
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separate terminals for input and static bypass lines, so
it makes possible to supply both mains from uneven
sources, like: two companies, one company and one
generator set, etc...
Static bypass line
input
Input line
Fig. 2. Manual bypass panel connection with the UPS with
separate bypass line.
The auxiliary contacts of the manual bypass and output
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switches, are not available in all series.
For parallel or redundant systems based on «n» UPS's, the
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quantity of switches in the panel will be doubled for each one
of them that it is included, less the own manual bypass switch
that it is always common for the complete parallel system.
In graphical way, Fig. 2 and 3 the galvanic isolation trans-
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former is shown at the output, less those ones which under
request or particular specifications are requested. In the
point of view of taking advantages of the inherent features,
efficiency and price, it is the most recommended electrical
connection.
Nevertheless and depending if the unit has or not separate by-
pass line, the isolation transformer can be placed in one side or
other:
The standard or basic equipment and in case it is used
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as input voltage adaptor. So its electrical position will
be at the input necessarily.
Those models with separate bypass line, it will be con-
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nected at its input, when input mains of the UPS and
the static bypass line come from two different sources;
in order to avoid the direct connection of the neutral at
the output of the own UPS.
The manual bypass panel will be connected with the input line,
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static bypass line, the UPS and loads,
phase or phases rotation, neutral N and the PE cable
stated in the labelling of any of them.
If case of any discrepancy between the labelling and the in-
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structions of this manual, the labelling will always prevail.
MANUAL BYPASS
PANEL
To loads
IT -option-
UPS
by respecting the
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