Steca Xtender
Installation and Operating Instructions 723.932 Xtender V0.511 Seite 31
Fig. Description and comment
16 Example of cabling of 9 Xtenders in three-phase and parallel – AC part
Special feature: In fixed high power installations, it is advised that a shared neutral be
retained, distributed to all parties in the grid (see (C))
The comments for figs. 12 to 15 are valid.
17 Example of cabling of 9 Xtenders in three-phase and parallel – DC part (distribution
bar)
18 Example of cabling of 9 Xtenders in three-phase and parallel – DC part in star
formation
Elem. Description Comment
a RCC-02/03
remote control This device allows complete configuration of the installation as well
as displaying the system behaviour. It is recommended but not
necessary for the installation to function well. See chapter 6.4 -
p.24.
b Battery The battery capacity is constituted according to figures 5a to 6d
based on the required voltage.Note: It is vital that the voltage and
the polarity of the battery be checked before connecting to the
inverter. An overload or incorrect polarity could seriously damage
the Xtender. Correct dimensioning of the batteries is essential for
troublefree operation of the system. See chapter 4.3.1 - p. 11.
e Communications
cable Communications cable. Only an original cable supplied by Steca
may be used. The total length of the communications cable must
not exceed 100 m for 3 x RCC-02/03 or 300 m for a single RCC-
02/03.
f Protection
devices A fuse-type device, thermal circuit breaker or magnetic-thermal
circuit breaker (see fig. 8a) must be installed on at least one of the
two battery conductors. It will ideally be placed on the positive pole
of the battery and as close as possible to this. The calibre of the
device is selected according to the cable section used.
If the negative pole of the battery is not earthed, it must also be
protected by such a device.
g Battery cables
(positive) The battery cables must be of the correct section and appropriately
set and tightened at the two extremities. They must be as short as
possible, particularly for the negative pole. The total length of the
cables must not exceed 6 m.
h Distribution bar Positive pole of the battery
j Distribution bar Negative pole of the battery
k Wind-powered
generator One or more wind-powered generators with their own regulation
system may be used to directly charge the battery. Its dimensioning
does not depend on the Xtender and does not interfere with it.
l
m Solar generator One or more solar-powered generators with their own regulation
system may be used to directly charge the battery. Its dimensioning
does not depend on the Xtender and does not interfere with it.
r Remote control
via dry contact A control device may be connected to the terminals (7) of the
Xtender. See chapter 6.2.11 - p. 23.
The length of the connection cable must not exceed 5 m.
t BTS-01
temperature
sensor
The sensor is placed in immediate proximity to the battery. If the
installation comprises several Xtenders, a single sensor is
connected to one of the units. The battery voltage level will be
corrected by means of the ambient temperature. {1139}.
u