Principle Of Operation; The Power Inverter Output Waveform; Appliance Power Consumption - Vector VEC054D Owner's Manual & Warranty

90548011 VEC054D INVERTER.qxp
The inverter contains automated features that will reset and re-start its operation after overload and thermal
shutdown without action by the user.
WARNING: TO REDUCE THE RISK OF INJURY OR PROPERTY DAMAGE: If the appliance does not work or
stops working, unexpectly, or even momentarily, turn off the appliance and disconnect from inverter until the
cause is identified and corrected.

PRINCIPLE OF OPERATION

The MAXX SST™ inverter converts 12 volt DC (direct current) from a vehicle battery or other 12 volt DC power
source to standard 120 volt AC (alternating current) household power.

The Power Inverter Output Waveform

The AC output waveform of the Power Inverter is known as "modified sine wave." It is a waveform that has
characteristics similar to the sine wave shape of utility power. This type of waveform is suitable for most AC
loads, including linear and switching power supplies used in electronic equipment, transformers, and motors.
The modified sine wave produced by the Power Inverter has an RMS (root mean square) voltage of 115 volts,
which is the same as standard household power. Most AC voltmeters (both digital and analog) are sensitive to
the average value of the waveform rather than the RMS value. They are calibrated for RMS voltage under the
assumption that the waveform measured will be a pure sine wave. These meters will not read the RMS voltage
of a modified sine wave correctly. They will read about 20 to 30 volts low when measuring the output of the
inverter. For accurate measurement of the output voltage of this unit, use a true RMS reading voltmeter such as
a Fluke 179, Fluke 79 III series, Beckman 4410 or Triplett 4200.
Modified Sine Wave and Sine Wave Comparison
Incompatible Products:
CAUTION: Certain products contain power supplies or circuits that are not compatible with an
inverter using a modified sine wave output (such as this inverter) and may be damaged by using this
inverter.
If your product requires pure sine wave AC input power to function properly, the instruction manual
for your product could state this. If in doubt, you should contact your product manufacturer PRIOR
TO USE.
Some products must be powered from a pure sine wave power source, such as standard household
power, or a "pure sine wave" inverter in order to function properly.
Your product could be damaged by this inverter if it contains:
1. Transformer type power supplies
2. Microprocessor controlled power supplies
3. Capacitive coupled power supplies
If an incompatible product is used with this inverter:
• The product might not operate at all, with no indication of failure. The product fuse might have
opened as a result of trying to use it with the inverter.
• The product exhibits unusual operation (such as, intermittent operation, buzzing, and the like.)
WARNING: If the product does not operate normally, to reduce the risk of injury or property damage:
• Turn the product off immediately and unplug it from the inverter.

APPLIANCE POWER CONSUMPTION

MAXX SST™ inverters are ideal for powering:
• Lights
• TVs and TV/DVD (VCR) combinations units
• Radio receivers/transceivers and stereo systems
• Computers and peripheral equipment
• Refrigerator/freezers
• Small microwave ovens
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