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SECTION 3 |
cold conditions (will build up sulfation) or will be overcharged during hot
conditions (will boil and lose excessive water) .
benefit 8: The Battery Charger Section is able to operate in parallel
with another external charging source like Solar Charge Controller / AC
Charger of up to 50A capacity. The output of the external charging source
is routed through the unit. Please note that Lead Acid batteries should
not be charged at very high charging currents to prevent adverse effects
like reduction in returned capacity, excessive surface charge, overheating,
excessive pressure build up in sealed batteries (generation of Oxygen and
Hydrogen will be > recombination) etc. Normally, the maximum charging
current is limited to 10% of the Ah capacity of the battery unless the
battery manufacturer allows higher charging current. When a battery is
charged simultaneously by multiple charging sources, all the charging
currents will add up and may result in very high charging current with
respect to the Ah capacity of the battery. The charging current fed from
the external source is measured and the charging current generated by
the internal charger is automatically controlled to ensure that the net
charging current fed to the battery does not exceed the net programmed
Bulk Charge Current.
benefit 9: The Inverter Section has a powerful surge power capacity -
3 times the continuous power capacity that lasts for 1 millisecond and
2 times the continuous power capacity that lasts for 100 milliseconds. The
higher surge power enables use of lower powered inverter for powering
of devices like air-conditioners, refrigerators, compressors, sump and
well pumps etc. that require very high starting surges. Hence, lack of
adequate surge capacity will demand use of a higher powered and higher
priced inverter. Further, all inverters consume power for running their
internal circuitry – called "No Load Power" or "Self Consumption". As
the efficiency is a ratio of the output power versus the input power, the
optimum efficiency is obtained at or near full rated power of the inverter.
The very high surge rating of the G4 Series enables operation of this
Series near its full load and hence, this Series is able to operate in the high
efficiency region when powering such devices.
benefit 10: The inverter design incorporates "Soft Start" feature with the
following advantages and protections:
-
When the inverter is turned on, the output voltage ramps up
gradually from around 40 vAC to 120 vAC in around 350 ms. This
reduces otherwise very high starting inrush current drawn by AC
loads like Switched Mode Power Supplies (SMPS) and motor driven
loads like fans, pumps, compressors etc. This will result in lower
motor inrush current (which typically can be up to 650% of the full
load current of the motor), which means lesser mechanical stresses,
wear and tear and increased lifetime of the motor, coupling and
fan. Additionally, the impact on the load side components is greatly
reduced, meaning less likelihood of causing problematic voltage drops
during starting.
-
When high power load or load with high starting / inrush surge is
switched ON when the inverter is running and supplying the full rated
voltage, the output voltage will momentarily dip and ramp up again
gradually. This will have the same effect as described above
-
Reduction in output voltage and consequent reduction in output current
due to high inrush surge conditions imposed by certain loads prevents
the inverter from premature failure due to excessive overloading
benefit 11: A detachable LCD Panel has been provided that can function
General description &
Principles of Operation
both as a local control (fits snugly on the top of the unit) or a remote
control, if desired. This saves the cost of purchasing an optional Remote
Control.
benefit 12: When an inverter is operating without any load connected to
it, it requires some minimum input power from the battery to keep all the
sections inside the unit alive and ready to deliver power to the AC load as
soon as the load is switched on. This power is called the "No Load Power
Draw" or the "Idle Power" or "Self Power Consumption" (We will call this
as the "No Load Power Draw"). If the unit is on and is not powering any
load, this "No Load Power Draw" is wasted as it unnecessarily drains the
battery and hence, should be minimized, if possible. The "No Load Power
Draw" of this unit in the Normal Mode is around 35W to 45W.
This unit has a provision to minimize this "No Load Power Draw", if
required (applicable only when the unit is in "Inverter Mode"). This is
achieved by enabling the "Power Save Mode". When "Power Save
Mode" is enabled, the unit does not provide continuous output power
but discontinuous and pulsing output power consisting of only 2 to 3
cycles of reduced 40 vAC output voltage that are made available every
2.8 seconds and are used to sense if a minimum load is present or not.
As continuous power is not being supplied, the "No Load Power Draw"
is reduced to less than 5W. If a load > 60W is sensed, the unit starts
providing continuous normal output power (will now consume the full
35W to 45W of "No Load Power Draw" of the Normal Mode in addition
to the power consumed by the load). If the load drops to < 10W, the unit
once again reverts to a discontinuous output of 2 to 3 cycles of reduced
voltage of 40v every 2.8 seconds and the "No Load Power Draw" once
again drops to 5W.
benefit 13: Heavy duty 80A SPDT Transfer Relay (2 x 40A relays in
parallel) provides reliable handling of up to 300% surge power and Crest
Factor of up to 3 for typical non-Power Factor corrected AC loads.
benefit 14: Neutral to Ground bond switching is carried out
automatically. The SPDT Transfer Relay switches both the Hot and
Neutrals. AC output Neutral is bonded to Chassis Ground in Inverter
Mode and is isolated in Utility/Generator Modes, ensuring Single Point
Ground System for Rv and marine applications to prevent possibility of
electric shock and nuisance tripping of GFCIs.
benefit 15: Higher upper DC input voltage limit of 16v (12v battery) and
32v (24v battery) is able to accommodate higher than normal operating
and charging voltages for optimim charging of Lead Calcium batteries in
automotive and marine applications.
benefit 16: Complies with the following safety and EMI/EMC standards:
Safety
Intertek- ETL listed – Conforms to ANSI /
compliance
UL STD. 1741
Intertek- ETL listed – Certified to CAN /
CSA STD. C22.2 No. 107.1-01
Intertek –ETL listed – Conforms to ANSI /
UL STD. 458
EMI / EMC
Certified to FCC Part 15(B), Class A
compliance
Certified to ISO 7637-2 for immunity against
conducted electrical transients in vehicles
SAMLEX AMERICA INC. | 13
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