Salicru SLC ADAPT, User Manual

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4. DESCRIPTION
•
The manual bypass is an optional peripheral for the UPS
that allows the power supply source for the loads to be
selected from the UPS or directly from the commercial
network. If the UPS has an isolation transformer fitted at
its output or on the static bypass line, the manual bypass
panel must also incorporate it in order to equalise the neu-
tral regime.
The optional isolation transformer provides galvanic isola-
tion between the primary and secondary windings, in such
a way that it greatly reduces electrical and transient noise
from the network, and this is also transferred to a lesser
extent to the secondary.
•
The manual bypass panel is of the overlapping type, so the
power supply to the loads is not cut due to switching, unless
it is operated in an order other than the one established.
•
If the “backfeed protection” contactor is incorporated in-
side the panel, it must be considered that its operation is
automatic and it does not require any attention, unless one
of the protection fuses trips unexpectedly. Do not operate
the disconnect switch with “backfeed protection” fuses,
except when replacing one of these protection elements.
•
These instructions are generic for each range indicated in
the nomenclature, regardless of the type of panel. Disre-
gard the terminal connections and switch operations that
are not available on your unit.
4.1. MANUAL BYPASS PANEL TYPES
•
In structural terms, there are two types of manual bypass
panel, according to the structure of the UPS itself:
ˆ
Standard or basic (Fig. 1). With a common input for the
supply of the UPS (rectifier-PFC) and the static bypass line.
UPS
MANUAL
BYPASS PANEL
To loads
Input line
IT -optional-
Fig. 1. Connection of the standard manual bypass panel to
the UPS.
ˆ
With a separate static bypass line (Fig. 2). These panels
have separate terminal blocks for the input and static
bypass networks, which allows both networks to be
supplied from different sources, such as: two compa-
nies, a company and a generator set, etc.
UPS
MANUAL
BYPASS PANEL
To loads
Input line
Static bypass
input line
IT -optional-
Fig. 2.
Connection of the manual bypass panel with
separate static bypass line to the UPS.
•
The auxiliary contacts of the manual bypass and output
switches are not available on all series.
•
For parallel or redundant systems made up of “n” UPSs, the
number of panel switches will be doubled for each one that
is configured, except for the manual bypass itself, which is al-
ways common for the entire system.
•
In Fig. 2 and 3, the galvanic isolation transformer is shown
at the output, as, with the exception of design constraints
or particular specifications, it is the most recommended ar-
rangement in terms of taking best advantage of its intrinsic
characteristics, performance and price.
However, and depending on whether it has a separate static by-
pass line or not, the isolation transformer may be located in one
position or another:
ˆ
On standard or basic units, and if it is used as an input
voltage adapter, its electrical position will have to be
on that line.
ˆ
On models with a separate static bypass line, it will
be positioned at the input of this line, when the UPS
and the static bypass input network comes from two
different sources to prevent the direct connection of
disparate neutrals at the output of the UPS.
•
The manual bypass will be connected to the input line, the static
bypass line, the UPS and the loads, respecting the order of
the phase or phases, neutral N and the earth cable
indicated on the labels of all of them.
•
When there are discrepancies between the labels
and the instructions in this manual, the labels will
always take precedence
USER'S MANUAL