Samlexpower PST-15S-12A Owner's Manual page 23

NOTE: When using cigarette lighter receptacle in a 12V vehicle, limit the power
to less than 100 watts as the cigarette lighter receptacle wiring in a 12V vehicle is
normally fused for 8 to 10A
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 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.
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