Cabling; Choice Of System; Hybrid Stand-Alone Systems; Grid-Connected Back-Up Systems - Xtender XTS 900-12 User Manual

Studer Innotec SA
Xtender
4

CABLING

The connection of the Xtender inverter / charger is an important step of the installation.
It may only be carried out by qualified personnel and in accordance with the applicable local
regulations and standards. The installation must always comply with these standards.
Pay attention that connections are completely tightened and that each wire is connected at the
right place.
All cables must be insulated. The IEC/EN 62109-1 norm states requires that the cables must be
insulated with PVC, TFE, PTFE, FEP, neoprene or polyimide.
4.1 C
HOICE OF SYSTEM
The Xtender may be used in different system types, each of which must meet the standards and
particular requirements associated with the application or site of installation. Only an appropriately
qualified installer can advise you effectively on the applicable standards with regard to the various
systems and the country concerned.
Examples of cabling are presented in appendix I of this manual, fig. 5 and following. Please carefully
read the notes associated with these examples in the tables on p. 33 and following.

4.1.1 Hybrid stand-alone systems

The Xtender can be used as a primary supply system for off-grid sites where a renewable energy
source (solar, wind or hydraulic) is generally available and a generator is used as backup. In this case,
batteries are generally recharged by a supply source such as solar modules, wind power or small
hydropower systems. These supply sources must have their own voltage and/or current regulation
system and are connected directly to the battery. (Example, fig. 11)
When the energy supply is insufficient, a generator is used as a back-up energy source. This allows
the batteries to be recharged and direct supply to consumers via the Xtender transfer relay.

4.1.2 Grid-connected back-up systems

The Xtender can be used in a back-up system, also known as an uninterruptible power supply (UPS)
– enabling a reliable supply to a site connected to an unreliable network. In the event of an
interruption to the energy supply from the public network, the Xtender, connected to a battery,
substitutes the faulty source and enables a support supply to the users connected downstream. These
will be supplied as long as the energy stored in the battery is sufficient. The battery will quickly be
recharged at the next reconnection to the public grid.
Various application examples are described in figs. 8a – 8c in appendix 1.
The use of Xtenders in a UPS back-up system must be carried out by qualified personnel who
have been checked by the responsible local authorities. The diagrams in the appendix are
given for information and as a supplement. The applicable local standards and regulations
must be adhered to.

4.1.3 Integrated mobile systems

These systems are meant to be temporarily connected to the grid and ensure the supply of the
mobile system when this is disconnected from the grid. The main applications are for boats, service
vehicles and leisure vehicles. In these cases, two separate AC inputs are often required, one
connected to the grid and the other connected to an on-board generator. Switching between two
sources must be carried out using an automatic or manual reversing switch, conforming to the
applicable local regulations. The Xtender has a single AC input.
Various application examples are described in figs. 10a – 10b – 10c.

4.1.4 Multi-unit systems

Whatever system is selected, it is possible to realise systems composed of several units of the same
type and the same power output. Up to three Xtender in parallel or three extenders forming a three-
phase grid or three times two or three Xtender in parallel forming a three-phase / parallel grid, may
be thus combined.
User manual V4.6.0 16