Stationary Installation; Installation With Automatic Pe-Neutral Switching; Lightning Protection; Recommendations For Dimensioning The System - Xtender XTS 900-12 User Manual

Studer Innotec SA
Xtender

4.2.2 Stationary installation

The installation may be equivalent to a mobile installation (with interrupted neutral).
In a fixed installation where the neutral is connected to the earth at a single installation point
upstream of the Xtender, it is permissible to carry out a connection of the neutrals in order to preserve
an unchanged earthing system downstream, independent of the operating mode of the Xtender.
This choice has the advantage of keeping the protection devices downstream of the Xtender. This
connection can be executed according to the examples in appendix 1, or carried out by modifying
the parameter {1486}.
In this case, the appearance of the first fault will lead to the installation stopping or the disconnection
of the protection devices upstream and/or downstream of the Xtender.
Safety is guaranteed by the equipotential bonding and by any RCD circuit breakers placed
downstream.
This connection (C) is not permitted if a socket is installed upstream of the Xtender.

4.2.3 Installation with automatic PE-neutral switching

In certain applications, it is desirable to keep the neutral upstream and downstream of the Xtender
separated (C) while re-establishing the earthing system (TN-S, TT or TNC-S) in the absence of voltage
at the input. This functionality is forbidden by default by the parameter {1485}. This parameter can
be modified by the parameter {1485} via the RCC-02/-03 remote control. This modification must be
carried out possessing technical knowledge, at the responsibility of the installer and in conformity
with the applicable regulations and standards.
The authorization of this function adheres to the requirements for an earth-neutral connection at the
source.

4.2.4 Lightning protection

As per the installation site, it is highly recommended to set a protection strategy to protect your
installation against lightning. The strategies depend on various parameters directly linked to each site
and we recommend therefore dealing very professionally with this issue.
Damages due to lightning often result in significant costs (full replacing of the printed
electronic board) and are not covered by Studer Innotec's warranty.
4.3 R
ECOMMENDATIONS FOR DIMENSIONING THE SYSTEM

4.3.1 Dimensioning the battery

The battery capacity is dimensioned according to the requirements of the user – that is 5 to 10 times
its average daily consumption. The discharge depth of the battery will therefore be limited and the
service life of the battery will be extended.
On the other hand, the Xtender must have a battery capacity that is large enough to be able to
take full advantage of the performance of the equipment. The minimum capacity of the batteries
(expressed in Ah) is generally dimensioned in the following way: five times the rated power output
of the Xtender / the battery voltage. For example, the model XTH 8048 must have a battery of a
minimum capacity of 7000*5/48=730 Ah (C 10). Because of the inverter's extreme overload capacity,
it is often recommended that this value be rounded up. An under-dimensioned battery may lead to
an accidental and undesired stopping of the Xtender in the event of high instances of use. This
stoppage will be due to a voltage that is insufficient on the battery, subject to a strong discharge
current.
The battery will be selected with regard to the greatest value resulting from the calculations set out
above.
The battery capacity determines the adjustment of the parameter {1137} "battery charge current".
A value between 0.1 and 0.2 x C batt. [Ah] (C10) enables an optimum charge to be guaranteed.
The methods proposed to dimension the batteries; inverter and generator are strictly
indicative and in no way constitutes a guarantee of perfect dimensioning. The installer is
solely responsible for good dimensioning and installation.
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