Samlexpower SEC-1250UL Owner's Manual - Section 4 |
14 | SAMLEX AMERICA INC.
seCtIOn 4 |
Principle of Operation
!
cAUtion!
3stagechargingisrecommendedforchargingstand-alone,unloadedbatteries
(thereisnoloadconnectedtothebatterywhenitisbeingcharged).Ifaload
isalsoconnectedsimultaneously,apartofthecharger’soutputcurrentwill
bedivertedtothisload.Thus,thechargermayremainlockedinStage2ifthe
currentdrawnbytheloadismorethanthepresetvalueofthresholdcurrent
determiningchangeoverfromStage2toStage3.Thiswillleadtoover-charg-
ing and loss of electrolyte.
Forchargingabatterywhenaloadisalsoconnectedsimultaneously,Stage2
voltageshouldbesameasStage3.Select“LoadedBattery”withthehelpof
DIPSwitchesmarked“Mode”(7)-SeeSection7under“DIPSwitchSetting”on
page 21.
seCtIOn 5 |
Protections
The charger has the following protections:
SHoRt ciRcUit SHUt doWn
Incaseofashortcircuitontheoutputside,theoutputofthechargerwillbeshutdown.
AnothersymptomofshortcircuitshutdownisthatthefanwillbeONtilltheunitis
resetorswitchedOFF.OntheoptionalRemoteControl900-RC,GreenLEDmarked
"Power"andRedLED"IPhase"willbelit.Thechargerwillbelatchedinthisshutdown
conditionandwillNOTrecoverautomaticallyevenaftertheshortcircuitconditionis
removed.Toreset,theACinputpowerON/OFFswitchatthebackoftheunithastobe
switchedOFFandONagain.
oVeR loAd cURRent liMitinG
Thecurrentdrawnbytheloadisautomaticallylimitedtoamaximumof50Afor
SEC-1250UL(25A+/-1Ain“HalfPowerMode”)and2AforSEC-2425UL(12.5A+/-1A
whenin“HalfPowerMode”).Iftheloadtriestodrawahighercurrentthantheselim-
its,theoutputvoltageoftheunitwillstarttodrop.Theunitwillautomaticallyrecover
whentheoverloadconditionisremoved.
ReVeRSe BAtteRy connection – dc Side FUSeS Will BloW
TheoutputisinternallyfusedontheDCside-2x30AfusesforSEC-1250ULand2X
20AfusesforSEC-2425UL.Incase,thepolarityofthebatteryconnectionisreversed,the
fuse(s)willblow.AnothersymptomofblownfuseonDCsideisthatthefanwillbeON
tilltheunitisswitchedOFF.OntheoptionalRemoteControl900-RC,GreenLEDmarked
"Power"andRedLEDmarked"IPhase"willbelit.