SamplexPower SEC-1250UL Guide D'utilisation page 22

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SECTION 7 |
In a single battery bank, two or more batteries may be connected in parallel to increase
their Ah capacity. These will be discharged and charged as a single battery bank. In this
case, the paralleled bank of multiple batteries is to be considered as a single bank and
connected to any one of the 2 banks of the charger as shown in Fig. 7.2 for bank of 4
batteries. For proper charging of all the batteries, please ensure that the Positive wire
"A" from the charger is connected to the Positive terminal of the first battery (Battery
1) and the Negative wire "B" is connected to the Negative terminal of the last battery
(Battery 4). This will ensure the following:
• Resistance of the interconnecting cables will be balanced and the individual batteries
will see the same series resistance
• All the individual batteries will be charged at the same charging current and thus will
be charged to the same state of charge
• None of the batteries will see an over-charge condition
When connecting a single battery or other single DC load, it can be connected to the
common Negative and any one of the 2 Positive terminals as in Fig. 7.1.
7.3 CHARGING MORE THAN ONE BANK OF BATTERIES
!
CAUTION!
When charging 2 banks of batteries at the same time using 3 Stage Charging,
ensure that the batteries in the banks are in a similar discharged condition. If one
bank is completely discharged and another is almost fully charged, the bank that
is fully charged will be subjected to over charge condition during the time when
the charger remains in Stage 2 (Absorption Stage) for charging the completely
discharged bank.
If 2 banks of batteries are required to be charged and they are at different dis-
charged conditions, select 2 Stage Charging (Absorption Stage disabled) with the
help of DIP switches S1 and S2 (both S1 & S2 in off condition) - See Tables 7.1 and
7.2 under Section 7.4
7.4 SELECTING 3-STAGE OR 2-STAGE CHARGING AND TYPE OF BATTERY
These chargers are designed to provide the following 3-Stage / 2-Stage charging algo-
rithms for Lead Acid Batteries (Flooded / AGM / Gel Cell types)
• 3-Stage Charging Algorithm: Bulk Stage " Absorption Stage " Float Stage for Lead
Acid Batteries. Charging Curves for 3-Stage Charging Algorithm are given at Fig 4.1
for SEC-1250UL and at Fig 4.2 for SEC-2425UL. Details of the 3 stages of charging
operation are explained at Sections 4.3.1 to 4.3.3
22 | SAMLEX AMERICA INC.
Preparing the Charger for Operation

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