Samlexpower SEC-1250UL Owner's Manual - Section 5 |
14 | SAMLEX AMERICA INC.
SAMLEX AMERICA INC. | 15
seCtIOn 5 |
Protections
coolinG
Thechargeriscooledbyconvectionandinaddition,hasafanforforcedair-cooling.
The operation of the fan is controlled by the current supplied by the charger and will be
switchedONandOFFautomaticallyasfollows:
Sec-1250Ul
Sec-2425Ul
SwitchONcurrent
10A+/-1A
6A+/-1A
Switch off current
5A+/-0.5A
3A+/-0.5A
note:Oncethefanswitchesonatthespecifiedcurrentthreshold,itwillswitchoffat
alowerthreshold.Forexample,thefaninSEC-1250ULswitchesONat10Abutswitches
OFFat5A.ThisistopreventthefanfromoscillatingbetweenONandOFFconditions
duetominorfluctuationsinloadcurrent
oVeR teMPeRAtURe SHUtdoWn
!
cAUtion!
Keepthechargerinawellventilated,coolandopenarea.DONOTBLOCKTHE
VENTHOLESonthesidesorthedischargeopeningsofthecoolingfan.Keepat
least 6” clearance on all sides
In case the fan fails or if the cooling is not adequate due to higher ambient tempera-
ture,inadequateaircirculationorblockageofairventilationopenings,thetemperature
insidetheunitwillrise.Atemperaturesensorismountedoninthewindingsofthe
powertransformer.At105°C+/-5°Cthethermalsensorwillactivateandshutdownthe
outputvoltageofthecharger.ThefanwillbeON.OntheoptionalRemoteControl
900-RC,GreenLEDmarked"Power"andRedLEDmarked"IPhase"willbelit.The
chargerwillbelatchedinthisshutdownconditionandwillNOTresetautomatically
evenaftertheunithascooleddown.Toreset,theACinputpowerON/OFFswitchatthe
backoftheunithastobeswitchedOFFandONagain.
PRotection AGAinSt tRAnSientS / SURGeS in tHe Ac inPUt
Inanumberoflocations,theAClineinputisnotcleanandmaycontainhighvolt-
agetransients/surges.Topreventdamagetotheinternalcomponentsagainstthese
unwantedhighvoltages,thechargerusesaMOV(MetalOxideVaristor)forprotection.
Ifsurge/transientvoltagehigherthanapproximately170VACin120VMode/340VAC
in230VACModeappearintheACinput,theMOVwillconductandwillblowtheAC
side fuse.