Section 5: Protections; Short Circuit Shut Down - SamplexPower SEC-1250UL Mode D'emploi

seCtIOn 4 |
!
cAUtion!
3 stage charging is recommended for charging stand-alone, unloaded batteries
(there is no load connected to the battery when it is being charged). If a load
is also connected simultaneously, a part of the charger's output current will
be diverted to this load. Thus, the charger may remain locked in Stage 2 if the
current drawn by the load is more than the preset value of threshold current
determining change over from Stage 2 to Stage 3 .This will lead to over- charg-
ing and loss of electrolyte.
For charging a battery when a load is also connected simultaneously, Stage 2
voltage should be same as Stage 3. Select "Loaded Battery" with the help of
DIP Switches marked "Mode" (7) - See Section 7 under "DIP Switch Setting" on
page 21.
seCtIOn 5 |
The charger has the following protections:

SHoRt ciRcUit SHUt doWn

In case of a short circuit on the output side, the output of the charger will be shut down.
Another symptom of short circuit shut down is that the fan will be ON till the unit is
reset or switched OFF. On the optional Remote Control 900-RC, Green LED marked
"Power" and Red LED "I Phase" will be lit. The charger will be latched in this shut down
condition and will NOT recover automatically even after the short circuit condition is
removed. To reset, the AC input power ON/ OFF switch at the back of the unit has to be
switched OFF and ON again.
oVeR loAd cURRent liMitinG
The current drawn by the load is automatically limited to a maximum of 50A for
SEC-1250UL (25A +/- 1A in "Half Power Mode") and 2A for SEC-2425UL (12.5A +/- 1A
when in "Half Power Mode"). If the load tries to draw a higher current than these lim-
its, the output voltage of the unit will start to drop. The unit will automatically recover
when the overload condition is removed.
ReVeRSe BAtteRy connection – dc Side FUSeS Will BloW
The output is internally fused on the DC side - 2 x 30A fuses for SEC-1250UL and 2 X
20A fuses for SEC-2425UL. In case, the polarity of the battery connection is reversed, the
fuse(s) will blow. Another symptom of blown fuse on DC side is that the fan will be ON
till the unit is switched OFF. On the optional Remote Control 900-RC, Green LED marked
"Power" and Red LED marked "I Phase" will be lit.
14 | SAMLEX AMERICA INC.
Principle of Operation
Protections