SamplexPower SEC-1250UL Mode D'emploi page 10

seCtIOn 4 |
therefore, set 0.2 to 0.3V higher to compensate for the forward drops during float
condition when the charging current would have dropped to less than 1A. Hence,
the output voltage at the terminals of the two banks at no load (nothing connected
to the terminals of the banks) will read 0.2 to 0.3V higher because there is no for-
ward voltage drop as there is no current flow through the diodes. The voltages are
specified with respect to charging / load current as follows:
Absorption Stage ("U
Absorption Stage ("U
Float Stage ("U" Phase) of 13.5V for SEC-1250UL
Float Stage ("U" Phase) of 13.5V for SEC-2425UL
1.3 Please also note that the output voltage at the two banks may differ between
0.2 to 0.6V depending upon the different values of the charging current being deliv-
ered through each as a result of different values of voltage drops Vf and Vb.
2.1 Standard temperature conditions: The charging voltages shown pertain to bat-
tery electrolyte temperature of 77°F (25°C)
3.1 charger / Battery Voltage / current Values: When the battery is connected to
the charger and the charger is in ON condition, the voltage at the common charger
/ battery terminals will be the actual battery terminal voltage corresponding to its
state of charge ONLY when the charger is in "current limit condition" and is sup-
plying 50A for SEC-1250UL and 25A for SEC-2425UL. When the charger is NOT in
"current limit" condition and is supplying < 50A for SEC-1250UL or < 25A for
SEC-2425A, its terminal voltage will be nearly regulated and will be nearly equal to
the set Bulk / Float Voltage of 13.5V for SEC-1250UL (27V for SEC-2425UL) or nearly
equal to the Absorption Voltage of 14.4 / 14V for SEC-1250UL (28.8V / 28V for SEC-
2425UL). Under these conditions, the battery terminal voltage will also be at 13.5
(27V) or 14.4 / 14V (28.8V / 28V) although the actual intrinsic terminal voltage of the
battery corresponding to its State of Charge at that point of time will be lower.
3.2 The voltage curve shows the voltage at the charger output terminals, which will
be the same as the voltage at the battery terminals (assuming that there is no volt-
age drop along the wires connecting the charger to the batteries)
3.3. The Current Curve shows the current being drawn by the battery
10 | SAMLEX AMERICA INC.
Principle of Operation
" Phase) of 14.4 / 14V for SEC-1250UL
o
" Phase) of 28.8 / 28V for SEC-2425UL
o
At 5A +/- 0.5A
At 3A +/- 0.5A
At 0.1A
At 0.1A