Waeco PerfectCharge IU1512, Instruction Manual

Page: 42 / 220

Use of the IU0U automatic charger IU0U automatic charger
42
6.2 Charging characteristic
The charging characteristic is generally designated as a modified IU0U
characteristic.
I phase
At the beginning of the charging process, the empty battery is charged with
constant current until the battery voltage reaches 13.8 V or 27.6 V. When the
battery reaches this voltage level, the charging current slowly drops. With the
drop of the current to the 80 % mark, the charger switches over to the higher
charging voltage 14.4 V/14.8 V or 28.8 V/29.6 V.
Note
The charging voltage and the period for the main charging phase
(U0 phase) can be selected via a switch field (see Chapter
„Settings on the unit“ on page 37).
U0 phase
Here the time registration starts which limits the main charging phase (U0
phase) to a maximum of 4/8 hours. With the switching over of the charging
voltage, the current rises again to its maximum value. Now it remains
constant as long as the battery voltage is below 14.4 V/14.8 V or 28.8 V or
29.6 V.
After reaching the maximum voltage, the current drops again. Thereby the
voltage remains constant (U0). Within this main charging phase, which is
limited to 4/8 hours, the battery is fully charged.
U(V)
I(A)
I
I 80%
I 10%
Zeit (t)
I Phase U0 Phase U Phase
U
4/8 h
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