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Power Inverter
SAFETY INSTRUCTIONS
To ensure reliable service your power inverter must be
installed and used properly.
Read and understand the installation and operating
thoroughly prior to installation and use. Pay particular
attention to the WARNING and CAUTION statements
in this manual.
CAUTION statements advise against certain condi-
tions and practices that may result in damage to your
inverter.
WARNING statements identify the conditions or prac-
tices that may result in injury or death.
PLEASE READ ALL THE INSTRUCTIONS BEFORE
USING THIS POWER INVERTER.
WARNING:
To reduce this risk of fi re, electric shock, explosion or
injury:
● Do not connect to AC distribution wiring.
● Always disconnect appliances from the inverter and
turn the inverter off before working the appliance.
Multiple outlet power strips with switches and power
switches and circuit breakers only interrupt power
to the "live" socket terminals. The neutral terminals
remain powered with respect to the earth terminals.
● Do not make any electrical connections or discon-
nections in areas designated as IGNITION PRO-
TECTED including DC cigarette lighter type plug
connections and ring terminal connections. Always
disconnect appliance from the inverter before re-
moving the inverter power source.
● Do not obstruct or block the air vents on the invert-
er.
● The inverter is not a toy, keeps away from children.
CAUTION:
● Do not use with positive earth electrical systems (the
majority of modern vehicles are negative earth). A
reverse polarity connection will result in a blown fuse
and may cause permanent damage to the inverter.
● The inverter will not operate high wattage applianc-
es or equipment that produces heat, such as dryers,
microwave ovens and toasters.
● Earthing the neutral will cause the inverter to shut
down.
● Do not operate the inverter if it is wet. Water and
electric do not mix.
● Do not install the inverter in the engine compart-
ment, the inverter must be used in a well ventilated
position.
● This inverter is not tested for use with medical equip-
ment.
IMPORTANT CABLE INFORMATION
Substantial power loss and reduced battery operating
time result from inverters installed with cables that are
not able to supply full power. Symptoms of low battery
power can result from cables that are either excessively
long or of an insuffi cient gauge. Marine installations are
subjected to vibration and stresses that exceed those
of other mobile installations, therefore the installer/op-
erator should be especially aware of the requirements
to maintain secure, tight water resistant electrical con-
nections and provide for strain relief for DC cables and
appliance wiring. Cable insulation must be the appro-
priate type for the environment.
INTRODUCTION
The inverter supplies continuous power in the form of
one household type socket. The inverter has enough
power to run almost any household or electronic appli-
ance. Safety features include automatic shut down and
a low battery alarm to prevent damage to your battery.
CONTROLS, INDICATORS AND CONNEC-
TORS
The front panel of the inverter provides two LED indica-
tors. The green LED indicator shows the unit is working
correctly when lit. The red LED indicator shows inverter
shut down from overload, over voltage or over temper-
ature. The inverter is fi tted with an on/off switch, the on/
off switch is also used to force reset the inverter circuits
in case of overload, over voltage or over temperature.
Power is supplied through the three pin AC plug and
DC input power is supplied via the rear panel.
HOW INVERTERS WORK
Principle of operation
The inverter converts low voltage DC (direct current)
from a battery or other power source to standard AC
(alternating current) household power. The inverter
converts power in two stages. The fi rst stage is a DC to
DC conversion process that raises low voltage DC from
the inverter input to high volt DC. The second stage is
the actual inverter stage that converts the high DC into
AC power.
The DC to DC converter stage uses modern high
frequency power conversion techniques that have re-
placed bulky transformers found in less technologically
advanced models. The inverter uses advanced MOS-
FET transistors in a full bridge confi guration, which
ensures excellent overload capabilities and allows the
inverter to operate reactive loads such as small induc-
tion motors.
The output waveform
The AC output waveform is known as a "modifi ed sine
wave". It is a waveform that has characteristics similar
to the sine wave shape of standard household power.
This type of switching power is suitable for most AC
load, including linear and switching power supplies
used in electronic equipment, transformers and mo-
tors.
GB
7
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