Velleman SA7A123 Notice page 6

8. EARTHING CONNECTION
WARNING : YOU MUST PROVIDE THE INVERTER WITH AN EARTHING
CONNECTION BEFORE YOU USE IT.
• In a stationary land-based installation, the earthing terminal should be
connected to a metal earthing stake driven into the ground to a minimum depth
of 1.2m. One of the battery terminals (preferably the negative one) should also
be connected to the earthing stake if the battery system powering the inverter is
not equipped with a ground connection.
• If the inverter is used in a vehicle, where it is wired directly to the battery, the
earthing terminal is simply connected to the chassis of that vehicle. If, however,
the inverter has to power equipment used outside the vehicle, an earthing stake
should be used as described above.
• Connect the earthing terminal to the existing grounding system when the
inverter is used on a boat.
NOTE : The earthing terminal of the AC outlet is connected to the neutral terminal.
This is the same as with a standard household power point where the
neutral connection is bonded to earth and there is no voltage between the
two.
9. MEASURING AC VOLTAGES
The output wave of the AC inverter is a MODIFIED SINEWAVE. An AUTHENTIC
RMS VOLT METER is required to measure the AC output voltage. Using any
other type of voltage measuring device will result in an AC voltage reading that is
up to 20 to 30V lower than the rated value. Only an authentic RMS voltmeter
provides an accurate reading.
PI300W // 12V & 24V 5 VELLEMAN