Studer Innotec SA
next3
Technical user manual V1.3 © Studer-Innotec SA 29
5.2.2
Battery cable cross-section, DC protective and disconnection devices
The battery cables must also be as short as possible. Recommended section for the nx3 battery
cables is 2x70mm
2
and a 400Adc protection. The recommended cable cross-sections are valid for
lengths less than 3 m. Beyond this length, it is strongly recommended to oversize the battery cables
(possible up to 2x95mm
2
for cables connected to next3 battery poles) and consider the voltage drop
in the cables. The maximal battery cable length allowed is 10m.
For safety reasons, we recommend an annual check on the tightening and corrosion of all
connections. In mobile installations, the tightening of the connections should be checked even more
frequently. For lead acid batteries, an individual measurement of each cell is recommended. Any
divergent values can be a sign of problem.
To avoid any further loss and protection redundancy, the next3 does not have an internal fuse.
5.2.3
Connecting the battery
Start the connection on the next3 side first, without any voltage. Keep battery poles away/ protected
to prevent any unwanted contact with conducting parts.
5.2.3.1 next3 side connection
Insert the cable glands supplied on the battery cable before tightening the cable lugs. Crimp the
cable lugs and fasten the cable gland on the device. Repeat this for all battery cables. Fix the battery
cables to the appropriate connections "+ Battery" and "- Battery". The M8 screws must be very well
tightened (10Nm).
The battery cables must be protected by one of the following measures:
- protection device (fuse) and disconnection device at each pole
- protection device (fuse) and disconnection device on the pole not connected to the earth
In all cases check local regulation and normative.
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