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2.5.3 Transfer
While in the Standby Mode, the AC input is continually monitored. Whenever AC power falls below the
VAC Trip voltage 90VAC for 120VAC, the inverter automatically transfers back to the Invert Mode with
minimum interruption to your appliances - as long as the inverter is turned on. The transfer from Standby
mode to Inverter mode occurs in approximately 10 milliseconds. And it is the same time from Inverter
mode to Standby mode.
Though it is not designed as a computer UPS system, this transfer time is usually fast enough to keep
your equipment powered up.
There is a 15-second delay from the time the inverter senses that continuously qualified AC is present at the
input terminals to when the transfer is made. This delay is built in to provide time for a generator to spin-up
to a stable voltage and avoid relay chattering. The inverter will not transfer to generator until it has locked
onto the generator’s output. This delay is also designed to avoid frequent switching when input utility is
unstable.
2.5.4 Power Saver
There are 2 different working statuses for our Global LF
inverter:
“Power On” and “Power Off”.
When the power switch is in “Unit Off” position, the inverter
is powered off.
When the power switch is turned to either of “Power Saver
Auto” or “Power Saver Off”, the inverter is powered on.
Power saver function is designed to conserve battery power
when AC power is not or rarely required by the loads.
In this mode, the inverter pulses the AC output looking for an
AC
load (i.e. electrical appliance). Whenever an AC load (greater
than 25 watts) is turned on, the inverter recognizes the need for power and automatically starts inverting
and output goes to full voltage. When there is no load (or less than 25 watts) detected, the inverter
automatically goes back into search mode to minimize energy consumption from the battery bank.
In “Power saver on” mode, the inverter will draw power mainly in sensing moments, thus the
idle consumption is significantly reduced.
The inverter is factory defaulted to detect a load for 250ms every 3 seconds with DIP switch 3 to position
1. This can be turned off when in position
Power saver on
Figure 7
Power saver off
Figure 8
Power saver on (Load detected)
Figure 9
Figure 6
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