SamplexPower SEC-1250UL Mode D'emploi page 15

seCtIOn 5 |
coolinG
The charger is cooled by convection and in addition, has a fan for forced air-cooling.
The operation of the fan is controlled by the current supplied by the charger and will be
switched ON and OFF automatically as follows:
Switch ON current
Switch off current
note: Once the fan switches on at the specified current threshold, it will switch off at
a lower threshold. For example, the fan in SEC-1250UL switches ON at 10A but switches
OFF at 5A. This is to prevent the fan from oscillating between ON and OFF conditions
due to minor fluctuations in load current
oVeR teMPeRAtURe SHUtdoWn
!
cAUtion!
Keep the charger in a well ventilated, cool and open area. DO NOT BLOCK THE
VENT HOLES on the sides or the discharge openings of the cooling fan. Keep at
least 6" clearance on all sides
In case the fan fails or if the cooling is not adequate due to higher ambient tempera-
ture, inadequate air circulation or blockage of air ventilation openings, the temperature
inside the unit will rise. A temperature sensor is mounted on in the windings of the
power transformer. At 105° C +/- 5° C the thermal sensor will activate and shut down the
output voltage of the charger. The fan will be ON. On the optional Remote Control
900-RC, Green LED marked "Power" and Red LED marked "I Phase" will be lit. The
charger will be latched in this shut down condition and will NOT reset automatically
even after the unit has cooled down. To reset, the AC input power ON/OFF switch at the
back of the unit has to be switched OFF and ON again.
PRotection AGAinSt tRAnSientS / SURGeS in tHe Ac inPUt
In a number of locations, the AC line input is not clean and may contain high volt-
age transients / surges. To prevent damage to the internal components against these
unwanted high voltages, the charger uses a MOV (Metal Oxide Varistor) for protection.
If surge / transient voltage higher than approximately 170 VAC in 120V Mode / 340 VAC
in 230 VAC Mode appear in the AC input, the MOV will conduct and will blow the AC
side fuse.
Protections
Sec-1250Ul
10A +/- 1A
5A +/- 0.5A
Sec-2425Ul
6A +/- 1A
3A +/- 0.5A
SAMLEX AMERICA INC. | 15