EN
OPERATION
CHARGING CHARACTERISTICS
Charging procedure takes place in 3 phases:
BULK phase (constant current)
The batteries need more current than the battery charger can supply. Current is limited to the maximum rated output or
to a lower value if factors which determine a power reduction of the device are present. The battery charger can enter
this phase during start-up, when the batteries are low or when a high load is connected.
ABSORPTION phase (constant voltage)
The battery charger charges the batteries at a constant ABSORPTION voltage supplying the current needed when the
current requested is greater than the transition threshold between ABSORPTION and FLOAT and less than the maximum
output value or at a lower value if factors which determine a power reduction of the device are present.
FLOAT phase (maintenance)
The battery charger charges the batteries at constant FLOAT voltage when the current required is less than the transition
threshold between ABSORTPTION and FLOAT. In this phase, as the batteries reach maximum capacity, they will tend to
absorb increasingly low current. This float phase will allow the batteries to be on charge without risking overload.
(V)
V ABSORPTION *
(I)
IMAX**
ITH ABSORPTION-FLOAT***
BULK
ABSORPTION
FLOAT
NEW CYCLE
TIME
TIME
V FLOAT *
*
Depending on the type of charge selected.
** In case the battery chargers are connected in parallel (current sharing mode) the IMAX value must be multiplied by
the number of battery chargers (2 or 3).
*** In case the battery chargers are connected in parallel (current sharing mode) the ITH value must be multiplied by the
number of battery chargers (2 or 3).
The factory setting of the transition threshold between ABSORPTION and FLOAT is equal to 20% of the maximum nominal
value of the output current.