Samlexpower SEC-1245A Owner's Manual - page 12
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-1245A) or 28.8 V (SEC-2425A) when Flooded / AGM battery is
selected
•
14 V (SEC-1245A) or 28 V (SEC-2425A) when Gel Cell battery is selected
•
13.5 V (SEC-1245A) or 27 V (SEC-2425A) 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” (10 % of 45 A = 4.5 A for SEC-1245A and 10% of 25 A = 2.5 A for SEC-2425A), the
charger automatically transitions 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 tempera-
ture 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)
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-1245A) or 27 V
(SEC-2425A). 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 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)
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