Technical Data - Vetus BS1252 Instructions D'installation

(1) If the nominal battery voltage is being measured on the loose wire encl, while the
engine is stopped and the battery charger is switched off, then the B+ terminal of the
alternator is still directly connected to the + terminal of the starter relay. See also
chapter 'Installation' - Function of the terminals.
Remove the connection from alternator B+ to starter relay.
(2) If the voltage at all terminals is about the same but the voltage does not increase to
the desired value then the charge voltage of the alternator or battery charger is set
incorrectly.
In the case of fully discharged batteries it may take some time before the charge volt-
age will increase.
Note: The battery voltage will never be higher than the voltage at the B+ALTERNA-
TOR terminal of the battery splitter!
(3) If the alternator warning light remains on after the engine has been started but still
operating at idle speed, the alternator isn't charging. Therefore, increase for a short
period of time the rpm of the engine.
If the alternator doesn't charge any more after installation of the battery splitter then
check the terminal for the exciting current.
This terminal must be connected via the key-switch and an alternator warning light to
the battery and not to the B+ of the alternator. See drawing at page 57.
Note: It is possible that after installation of the battery splitter the engine control panel
or other equipment does not function (properly).
The power supply for engine panel or equipment in such a case is directly connect-
ed to the B+ terminal of the alternator. This is incorrect installation. Connect the sup-
ply directly to the battery or to a distribution rail for the consumers.

Technical data

Model
Number of batteries
Maximum charging current :
Battery voltage, nominal
Battery voltage max.
Forward voltage drop
Weight
16
090305.04
: BS1252
: 2
:
:
:
: 0.9 kg
125 A
12 Volt or 24 Volt
30 V
0.1 V @ 20 A
BS1253
3
1.3 kg
Battery splitter