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Reducing RF interference
To reduce the effect of radiated interference, twist the DC side cables. To further
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 performance 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 overloading / 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.
