Wagan 2007-2, User Manual, Page: 6 / 22

Sine Wave
3000 Watt AC Inverter by Wagan Tech
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Neutral and Ground are bonded inside the inverter to comply with the National Electric
Code (NEC) requirement that any AC source must have a Neutral to Ground connection.
Remote On/OFF Switch Connection
An optional cable and switch assembly provides a convenient Remote On/Off feature.
Contact your dealer for ordering information.
Power Inverter Output Waveform
This inverter’s AC output is a Modified Sine Wave (MSW) 115 volts AC. The comparison of
Modified Sine Wave and household AC is shown in the figure below.
This modified sine wave has a root mean square (RMS) voltage of 115 volts. Most ordinary
AC voltmeters are calibrated to read “average” voltage and assume that the AC waveform
will be a pure sine wave. These meters will not correctly read MSW voltage, and will display
about 20 to 30 volts too low. Any multi-meter identified as “TRUE RMS” will accurately read
MSW correctly. With this inverter, however, you can rely on the digital display for accurate
AC readings.
Inverter Output Characteristics — Sense Line
The high output terminals and outlets of this inverter are wired differently from household
wiring. The “ground” connection (the round connection on an outlet) is a “sense line” that
will shut down the inverter if a short circuit to “ground” occurs. The two “blade” connections
on an outlet are “hot”.
The sense line triggers shutdown if either “hot” terminal (the two flat connections on an
outlet) has an electrical path to the sense line. If this happens, it is reasoned that there must
be a short circuit to “ground” and the inverter will shut down. The inverter’s ERROR LED will
light to indicate this shutdown condition. The sense line can shut down the inverter with a
leakage of 5 mA or less.
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