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RADIO FREQUENCY INTERFERENCE
Radio Frequency Interference (RFI) is a phenomenon that exists in modern
society and is a problem in many areas of electronics. For Inverter users,
RFI normally presents itself in the form of static and/or interference when
listening to an AM radio and in unusual cases may interfere with TV reception.
Over the years Latronics has continued to invest significant time and effort in
the reduction of RFI related emissions from the entire product range, so that
they comply with the appropriate International and/or Australian Standards.
Even with this compliance, there are situations where RFI may still be a cause
for concern, and can differ greatly from installation to installation. Accordingly,
the following is a list of recommendations made to assist in the overall
reduction of RFI.
1.
Separate DC and AC wiring.
Avoid running DC and AC cables in the
same conduits and/or cable trenches. It is strongly recommended that
DC and AC wiring be separated by the greatest distance possible. In
extreme cases, the use of shielded conduit may be necessary.
2.
Minimize length of DC cabling
. DC cables can act as an aerial,
therefore all such cables should be kept as short as is practicable. For
best performance minimize DC cable length to Inverter and Batteries and
if possible avoid the use of auxiliary DC loads.
3.
240Vac Earth
. For household installations, it is recommended that a
"good" Earth Stake is located as nearby the Inverter as is possible.
4.
AM and HF Radios.
These types of radio equipment inherently suffer
from all forms of RFI, especially when the received signal level is weak.
In such cases reception can sometimes be improved by relocation of the
radio itself, alternatively the use of an appropriate external antenna and
co-axial cable
may be necessary. External antennas should be located
in a manner that ensures maximum signal strength whilst affording the
greatest possible distance away from the Inverter and Batteries.
5.
Televisions.
TV signals are transmitted as FM waveforms. This type of
signal fundamentally reduces the effects of RFI, therefore the use of a
good antenna and feeder cable is normally sufficient to ensure quality
reception. Locating the television as far as possible from the Inverter may
also improve picture clarity.
12
AC WIRING
*
Make sure the Inverter is switched OFF before working on the mains
wiring. Turn the AC Circuit Breaker switch into OFF position.
*
The active and neutral of the AC output are electrically isolated
from the battery negative, battery positive, and earth connections.
*
The Inverter AC output is connected directly to the Transformer output
winding.
*
Latronics Inverters have the AC output (active and neutral) floating with
respect to the DC and Earth. The Earth connection is connected to the
case only. This configuration provides the highest safety and most
flexibility for installation wiring.
*
The active
A
and neutral
N
of the AC output are electrically isolated from
the solar input and earth connections.
*
The earth
E
is connected internally to the Inverter case.
*
The Inverter is fitted with a Circuit Breaker for disconnection of the AC
grid in the case of installation, fault or service. Ensure the AC breaker is
switched OFF when working on AC wiring.
*
Suitable for
MEN
connection wiring.
WARNING:
The Inverter output is connected to mains electricity,
thus it is important that all AC wiring complies with the requirements of the
relevant wiring standards, (AS 3000, AS4777).
Any work carried out on AC/Mains wiring is to be performed by
Qualified and Licensed personnel only.
5
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