Studer Innotec XTH 3000-12

Steca Xtender

Installation and Operating Instructions 723.932 Xtender V0.511 Seite 32

Elem. Description Comment

A Input supply

cable The section is determined by means of the maximum current at

source and the protection device (H). In multi-unit systems, cables

(A) of the same phase must have the same length and section (see

comment fig. 12-2/3).

B Output supply

cable In multi-unit systems, cables (B) of the same phase must have the

same length and section (see comment fig. 12-2/3). The section

must be selected by means of the Xtender’s output current given

on the type plate and the protection device selected for the input

(see fig. 1a).

C Connection of the

neutrals See chapter 4.2 - p. 10.

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 shows the advantage

of keeping the differential protection devices downstream of the

Xtender.

This connection (C) is not permitted if a socket is installed

upstream of the Xtender.

D Differential circuit

breaker A protection device must be installed downstream of he source (G

or U) according to the local requirements and in compliance with

the applicable regulations and standards.

E Earth-neutral

connection bridge The neutral is earthed at a single point of the installation,

downstream of the source and upstream of the protection device(s)

at the default current (DDR). When several sources are available,

each source must have an earthed neutral. If the source has to be

retained with an isolated earthing system (IT) the applicable local

provisions and regulations must be applied.

F AC output

protection

devices for the

Xtender

A protection device dimensioned in dependence of the cable

section used may be installed downstream of the Xtender (main

circuit breaker before distribution). The cable section is to be

dimensioned according to the calculation table of maximum output

current (fig. 1). The Xtender has an internal current limitation the

value of which is stated on the type plate (35).

G Generator The generator is dimensioned according to the requirements of the

user. Its rated current will determine the configuration adjustment

{1107} “maximum current of the AC source”.

H Protection

devices at the

Xtender input

The protection device at the input of the Xtender must be

dimensioned according to the power output of the source at the

cable section used. It will not exceed a calibre equivalent to the

input current “I AC in” given on the type plate of the unit (35).

K Connection plug /

socket If the Xtender is connected to an AC source by means of a plug,

the connection cable must not exceed a length of 2 m, and the

socket must remain permanently accessible. The socket will be

protected by a protection device of appropriate calibre. The

connection of the neutrals (C) is prohibited in this case.

S Secured grid Distribution to the users supplied by the grid or the generator when

this is present or by the Xtender within the limit of its power output

from energy stored in the battery. This distribution is carried out in

conformity with the local standards and regulations.