Controls, Indicators And Connectors; Installing The Inverter - Defort DCI-300D Instrucciones De Servicio

CONTROLS, INDICATORS
AND CONNECTORS
The front panel of the inverter provides two LED indicators.
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 temperature. The inverter is fi t-
ted 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 replaced bulky trans-
formers found in less technologically advanced models. The
inverter uses advanced MOSFET transistors in a full bridge
confi guration, which ensures excellent overload capabilities
and allows the inverter to operate reactive loads such as small
induction 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 switch-
ing power is suitable for most AC load, including linear and
switching power supplies used in electronic equipment, trans-
formers and motors.
The modifi ed sine wave produced by the inverter has an RMS
(root mean square) voltage, which is the same as standard
household power. Most AC voltmeters (analog and digital) are
sensitive to the average value of the waveform rather than the
RMS value. They are calibrated for RMS voltage under the
assumption that waveform measured will be a pure sine wave.
Voltmeters will not read the RMS voltage of a modifi ed sine
wave correctly. The reading will be around 20-30 volts too low
when measuring the inverters output.

INSTALLING THE INVERTER

Power source requirements
The power source for the inverter must provide between 11
and 15 volts DC and must be able to supply the necessary cur-
rent to operate the load. The power source may be a battery or
a well regulated DC power supply. To obtain a rough estimate
of the current in Amps the power source must deliver simply
divide the power consumption of the load by 10.
Example: If a load is rated at 700 watts AC, the power source
must be able to deliver 700 by 10=70Amps.
CAUTION:
The inverter must be connected only to batteries with a nomi-
nal output voltage of 12 volts. The inverter will not work if con-
nected to a 6 volts battery and will sustain permanent damage
if connected to a 24 volts battery.
Connecting to the power source
The inverter is equipped with a cigarette lighter plug and bat-
tery clip cables (Inverter of 150 watts output without battery
clip cables) for connection directly to the power source.
Using the fused cigarette lighter plug
The cigarette lighter plug is suitable for operating the inverter
at power outputs up to 150 watts. The tip of the plug is posi-
tive and the side contact negative. Connect the inverter to the
power source by fi rmly inserting the cigarette lighter plug into
the cigarette lighter socket.
CAUTION:
Connect directly to battery or power source when operat-
ing above 150watts.
NOTE:
Most vehicle cigarette lighter circuits use fuses rated at 15 to
20 amps or greater. To operate at full output use the battery
clip cable.
Connecting to a power source using provided cables
If the inverter is to be used for extended periods at power lev-
els above 150 watts, direct connection to the power source
is required. Use the leads provided to connect directly to the
12-volt power source using the following guidelines
• Check that the inverter is switched off and no fl ammable
fumes are present
• Connect the black cable to the post marked negative (-) on
the back panel of the inverter Connect the black clip to the
negative (-) terminal the battery
• Connect the red cable to the post marked positive (+) on
the back panel of the inverter. Connect the red battery clip
to the positive (+) terminal of the battery.
• Check that all the connections between battery clips and
terminals are secure
CAUTION:
Loose connections may cause overheated wires and melted
insulation. Check to make sure you have not reversed the
polarity.
Connection to load
The inverter is equipped with a standard AC household type
socket. Plug the cord from the appliance you wish to use into
the socket. Make sure that the combined load requirement of
your equipment does not exceed the rated watts.
The inverter is engineered to be connected directly to standard
electrical and electronic equipment in the manner described
above. Do not connect the power inverter to household or
recreational vehicle AC distribution wiring.Do not connect the
inverter to any AC load circuit in which the neutral conductor is
connected to earth or the negative of the DC (battery) source.
WARNING:
Never connect to AC distribution wiring.
CAUTION: RECHARGEABLE APPLIANCES
Certain rechargeable devices are designed to be recharged
by plugging them directly in to a household socket. This type
of device must never be used in the inverter. The device will
damage the inverter. Do not use the inverter to recharge
items that can be plugged directly into a household socket.
This problem does not occur with the vast majority of battery-
operated equipment. Most of these devices use a separate
charger or transformer that is plugged into an AC household
socket. The inverter is easily capable of running most charg-
ers and transformers.
POSITIONING THE INVERTER
For best operating results, the inverter should be placed on a
fl at surface such as the ground, car fl oor or seat, or another
solid surface. The unit is equipped with a 1 meter-power cord
for easy positioning. The inverter should only be used in loca-
tions that meet the following criteria.
• Dry: do not allow water or liquids to come into contact with
the inverter
• Cool: ambient air temperature should be between -1 ºС
non-condensing, and 40 ºС. Do not place the inverter on
or near a heating vent or any equipment, which is generat-
ing heat above room temperature keep the inverter out of
direct sunlight.
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