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Reducing RF interference
To reduce the effect of radiated interference, twist the DC side cables. To furthur reduce RF
interference, shield the cables with sheathing /copper foil / braiding..
Taping battery cables together to reduce inductance.
Do not keep the battery cables far apart. In case it is not convenient to twist the cables, keep
them taped together to reduce their inductance. Reduced inductance of the battery cables helps
to reduce induced voltages. This reduces ripple in the battery cables and improves perfor-
mance and efficiency.
AC SIDE CONNECTIONS
Preventing paralleling of the AC output
The AC output of the inverter cannot be synchronised with another AC source and hence, it is
not suitable for paralleling. The AC output of the inverter should never be connected directly
to an electrical breaker panel / load center which is also fed from the utility power / generator.
Such a connection may result in parallel operation of the different power sources and AC
power from the utility / generator will be fed back into the inverter which will instantly
damage the output section of the inverter and may also pose a fire and safety hazard. If an
electrical breaker panel / load center is fed from an inverter and this panel is also required to
be powered from additional alternate AC sources, the AC power from all the AC sources like
the utility / generator / inverter should first be fed to a manual selector switch and the output
of the selector switch should be connected to the electrical breaker panel / load center.
To prevent possibility of paralleling and severe damage to the inverter, never use a simple
jumper cable with a male plug on both ends to connect the AC output of the inverter to a
handy wall receptacle in the home / RV.
Connecting to multi-wire branch circuits
Do not directly connect the hot side of the 120 VAC of the inverter to the two hot legs of the
120 / 240 VAC electrical breaker panel / load centre where multi-wire ( common neutral )
branch circuit wiring method is used for distribution of AC power. This may lead to overload-
ing / overheating of the neutral conductor and is a risk of fire.
A split phase transformer ( isolated or autotransformer ) of suitable wattage rating ( 25 % more
than the wattage rating of the inverter ) with primary of 120 VAC and secondary of 120 / 240
VAC ( Two 120 VAC split phases 180 degrees apart) should be used. The hot and neutral of
the 120 VAC output of the inverter should be fed to the primary of this transformer and the 2
hot outputs ( 120 VAC split phases ) and the neutral from the secondary of this transformer
should be connected to the electrical breaker panel / load centre.
