Samlexpower PST-1000-12 Owner's manual - Section 8 |
30 | SAMLEX AMERICA INC.
SAMLEX AMERICA INC. | 31
seCtIOn 8 |
Installation
naloftheunitandtheNegativeofthebatterytotheNegativeterminalofthe
unit).Iftheinputisconnectedinreversepolarity,DCfuse(s)insidetheinverter
will blow and may also cause permanent damage to the inverter.
connection from the Batteries to the Dc input Side of the Unit –
Wire and external Fuse Sizes
WARninG!
The input section of the inverter has large capacitors connected across the
inputterminals.AssoonastheDCinputconnectionloop(Battery(+)terminal
►Externalfuse► Positive input terminal of the inverter ► Negativeinput
terminal of the inverter
► Battery(–)terminal)iscompleted,thesecapacitors
will start charging and the unit will momentarily draw very heavy current that
willproducesparkingonthelastcontactintheinputloopevenwhentheoN/
off switch on the inverter is in the offposition.Ensurethattheexternalfuseis
inserted only after all the connections in the loop have been completed so that
thesparkingislimitedtothefusearea.
The flow of electric current in a conductor is opposed by the resistance of the conductor.
The resistance of the conductor is directly proportional to the length of the conductor
andinverselyproportionaltoitscross-section(thickness).Theresistanceintheconduc-
torproducesundesirableeffectsofvoltagedropandheating.Thus,thickerandshorter
conductors are desirable.
Thesize(thickness/cross-section)oftheconductorsisdesignatedbyAWG(American
WireGauge).PleasenotethatasmallerAWG#denotesathickersizeoftheconductor
uptoAWG#1.WiresthickerthanAWG#1aredesignatedAWG1/0,AWG2/0,AWG3/0
andsoon.Inthiscase,increasingAWG#denotesthickerwire.
TheDCinputcircuitisrequiredtohandleverylargeDCcurrentsandhence,thesizeof
the wires and connectors should be selected to ensure minimum voltage drop between
the battery and the inverter. Thinner wires and loose connections will result in poor
inverterperformanceandwillproduceabnormalheatingleadingtoriskofinsulation
meltdownandfire.Normally,thethicknessofthewireshouldbesuchthatthevoltage
drop due to the current & the resistance of the length of the wire should be less than
2%.Useoilresistant,multi-strandedcopperwirewiresratedat90ºCminimum.Donot
use aluminum wire as it has higher resistance per unit length. Wires can be bought at a
marine/weldingsupplystore.
effects of low voltage on common electrical loads are given below:
- Lighting circuits - incandescent and Quartz Halogen:A5%voltagedropcausesan
approximate10%lossinlightoutput.Thisisbecausethebulbnotonlyreceivesless
power,butthecoolerfilamentdropsfromwhite-hottowardsred-hot,emittingmuch
less visible light.
- Lighting circuits - Fluorescent:Voltagedropcausesanearlyproportionaldropin
light output.