Samlexpower PST-300-12 Owner's manual - Dc Input Connection
WARninG!
Useofanappropriatelysizedexternalfuseasdescribedaboveismandatoryto
provide safety against fire hazard due to accidental short circuit in the battery
wires.PleasenotethattheDCsidefuse(s)insidetheunitaredesignedtopro-
videprotectiontotheinternalcomponentsoftheinverter.ThesefuseswillNoT
blow if there is a short circuit along the length of wires connecting the battery
and the inverter.
Recommended Sizes of Wires and external Fuses
Thefollowingsizesofwiresandexternalfusesarerecommended.Thedistanceof3ft./
6ft./10ft.isthedistancebetweenthebatteryandtheinverter.Therunninglengthof
routing of the wire should be considered if the wiring run is not straight but circuitous.
Therecommendedsizeofwireswilllimitthevoltagedropto2%ofthenominalbattery
voltage(0.24Vfor12Vbatteryand0.48Vforthe24Vbattery)
Thelengthofthewireforcalculatingvoltagedrophasbeentakenas2timesthe
distance between the inverter and the battery assuming that 2 lengths of wires (one
PositiveandoneNegative)areusedfortheconnection.DCresistancevaluesarebased
onuncoated,strandedcopperconductorsatatemperatureof75°C.Thistemperatureis
typical of operating power circuits.
Model no.
Maximum
Dc input current
at rated output
power
Size of Wire
Minimum
current rating of
external fuse
3 ft.
6 ft.
10 ft.
PST-300-12
40A
AWG#8
AWG#6
AWG#4
40A
PST-300-24
20A
AWG#12
AWG#12
AWG#10
20A
*
NoTES:
1.Theamperecarryingcapacity(Ampacity)ofvarioussizesofwiresisbasedonNECTable
310.17forsingle,insulatedconductorsinfreeairat40˚Cambient.Thesizeisbasedonthe
fuse rating.
2.Thewiresizeisbasedonallowableampacityor2%voltagedrop,whicheveristhicker.
Dc input connection
InPST-300's,theDCinputterminalsforbatteryconnection(6&7infig.6.1)have
cylindricalhole(5mmdia.)withsetscrew(#10,24TPI).
Detachable Dc input Wiring Sets Provided with PSt-30S
followingDCInputWiringSetshavebeenprovidedfortemporaryconnectiontovehicle
batteryforpoweringlowpowerdeviceslikelap-top,cellphonecharger,etc.Pleaselimit
thepowerdrawntolessthan150W:
•
Wiresetwithcigarplug-AWG#14