Connecting The Battery; Protection Device Of The Battery - Studer VarioString User Manual

4.2.2 Connecting the battery

All connection cables as well as the battery cables must be mounted using cable restraints in order
to avoid any pulling on the connection.
Battery cables must also be as short as possible and the cross-section must comply with the
regulations and standards in force. Tighten the clamps on the "Battery" inputs sufficiently.
Each VarioString is connected directly to the battery using its own protective device. All
other consumers or sources are connected directly to the battery through their own
protective device.
Lead batteries are usually available in 2V, 6V or 12V blocks. In most cases, in order to get the correct
operating voltage for using the VarioString, several batteries must be connected in series. The
capacity of the batteries can be increased using a parallel connection of several battery strings.
Some battery manufacturers limit the use or advice against parallel connection of battery strings.
Strictly conform to the manufacturer's instructions of use.
In multi-unit systems (connected to the same communication bus), all VarioStrings must be
connected to the same battery bank.

4.2.3 Protection device of the battery

The battery cables must be as short as possible. The recommended cable cross-section is 50mm2
and the protection devices (battery side) must be 125A. The protection device must be installed as
close as possible to the battery. The recommended cross-section of battery cable is valid for lengths
up to 3m. Beyond this length, it is recommended to oversize the section of the battery cables.
Any other sources or loads existing on the battery must be connected using their own protection
devices. Never connect them to the protection device(s) of the VarioString.
An annual check of all the connection tightness is recommended. In mobile installations,
the connection tightness should be checked more often.
Battery cables must always be protected by one of the following measures:
Have a protection and disconnection device (fuse, circuit breaker) on the pole not
connected to earth.
The protection device must be rated according to the cable cross-section but must not
exceed 1.25 x VarioString maximum current. It will be mounted as close as possible to the
battery.
User manual V 1.0
Studer Innotec SA
VarioString
a = M10 cable lug!!
b = bolt M8x30
c = washer
d = ceramic washer
e = fusible
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