Samlexpower SEC-1260A Owner's Manual page 14

Stage 2 - Constant Overcharge Voltage, Timed Absorption / Boost Charge Mode (Uo
Phase): When the charger enters Stage 2 from Stage 1, the battery is approximately 70% to
80% recharged. As soon as it enters this stage, a timer circuit is also initiated. The timer
circuit can be selected to operate for 4 or 8 hours with the help of DIP Switches (5) (See
under "Selecting time for Absorption / Boost Stage"). During this stage, the charger will
output a higher constant overcharge voltage whose value will depend upon the type of
battery or charging stages selected ( The type of battery and charging stages are selected with
the help of DIP Switches (5) – See under "Selecting The Type of Battery and Charging
Stages"):
•
14.4 V (SEC-1260A and SEC-1280A) or 28.8 V (SEC-2440A) when Flooded /
AGM battery is selected
•
14 V (SEC-1260A and SEC-1280A) or 28 V (SEC-2440A) when Gel Cell battery
is selected
•
13.5 V (SEC-1260A and SEC-1280A) or 27 V (SEC-2440A) when loaded battery
is selected (2 stage charging)
The battery will further absorb charge at this voltage and the charging current will further
reduce. When the charging current reduces to approximately 10% of the charger capacity "I"
(6 A +/0 .5 A for SEC-1260A, 8 A +/0 .5 A for SEC-1280A and 4 A +/- 0.5 A for SEC-2440A),
the charger automatically changes over to "Stage 3 - Float / Maintenance Charge Mode (U
Phase)". However, if the charging current does not reduce to the above threshold level
(because of some defective / shorted cells or due to an external load in a loaded battery), the
charger will be forced to change-over to "Stage 3 or Float / Maintenance Charge Mode (U
Phase)" after elapse of 4 or 8 hours determined by the selected duration of the timer circuit.
The battery will be charged to approx. 95% of its capacity by the end of this stage. Ideally
it would be at 100%, but there are some practical limitations like temperature effect etc that
usually prevent full recharge.
During this Stage, following LED indications are provided:
•
Charging Indicator LED (4) on the front panel turns orange
•
Yellow LED under "Uo Phase" is lighted on the Remote Panel (15) ( Optional
accessory)
NOTE: The threshold of current for change-over between the Absorbtion / Boost Charge
Mode ("Uo" Phase) & the Float / Maintenance Charge Mode ("U" Phase) are
different as follows:
•
From "Uo" Phase to "U" Phase
•
From "U" Phase to "Uo" Phase
Stage 3 – Constant Voltage, Float or Maintenance Charge Mode (U Phase): During
this mode, the charger outputs a constant voltage U = 13.5 V (SEC-1260A and SEC-1280A)
or 27 V (SEC-2440A). This helps in maintaining full capacity of the battery and also
provides replacement charge to overcome self discharge of the battery. The battery can
remain connected in this stage indefinitely without the risk of discharging.
During this Stage, following LED indications are provided:
•
Charging Indicator LED (4) on the front panel turns green
•
Green LED under "U Phase" is lighted on the Remote Panel (15) (Optional
accessory)
SEC-1260A SEC-1280A
6 A +/- 0.5 A 8 A +/- 0.5 A 4 A +/- 0.5 A
8.5 A +/- 1 A 10 A +/- 1 A
Page 13
SEC-2440A
5 A +/- 0.5 A