Grounding to earth or to other designated ground.
For safety, the metal chassis of the inverter is required to be grounded to the earth
ground or to the other designated ground (for example, in a mobile RV, the metal frame of
the RV is normally designated as the negative DC ground). An equipment grounding bolt
with a wing nut has been provided for grounding the metal chassis of the inverter to the
appropriate ground.
When using the inverter in a building, connect a 10 Mmq insulated stranded copper wire
from the above equipment grounding bolt to the earth ground connection (a connection
that connects to the ground rod or to the water pipe or to another connection that is solidly
bonded to the earth ground). The connections must be tight against bare metal. Use star
was hers to penetrate paint and corrosion.
When using the inverter in a mobile RV, connect a 10Mmq insulated stranded copper wire
from the above equipment grounding bolt to the appropriate groundbus of the RV
(usually the vehicle chassis or a dedicated DC groundbus). The connections must be
tight against bare metal. Use star was hers to penetrate paint and corrosion.
The inverter contains internal switching devises which generate conducted and radiated
electromagnetic interference (EMI).
The magnitude of EMI is limited to acceptable levels by circuit design but can not be
entirely eliminated. The effects of EMI will also depend up on a number of factors
external to the power supply like proximity of the inverter to the EMI receptors, types
and quality of connection wires and cables etc. EMI due to factors external to the
inverter can be reduced as follows:
- Ensure that the inverter is firmly grounded to the grounded to the ground system
of the building or the vehicle.
- Locate the inverter as far away from the EMI receptors like radio, audio and video
devices as possible.
- Keep the DC side cables between the battery and the inverter as short as possible.
- Twist the DC side cables. This will partially cancel out the radiated noise from
the cables.
- Schield the DC side cables with metals heathing / copperfoil / braiding
- Use co-axial shielded cable for all antenna inputs (instead of 300 ohm twin leads)
- Use high quality shielded cables to attach audio and video devices to one another.
- Do not operate other high power loads when operating audio / video equipment.
LIMITING ELECTRO-MAGNETIC INTERFERENCE (EMI)
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