Operating the AC Bypass Switch
973-0031-01-01 Rev A 3–3
Normal Operation
External AC power passes to the AC Bypass Switch through the inverter to power
the load (Figure 3-2).
In this configuration, power passes from the inverter, through the AC Bypass
Switch, to the connected load. When external AC power is not available, power
from the external DC source is used by the inverter to power the AC loads.
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Bypass Operation
External AC power routed through the AC Bypass Switch directly to the AC loads
(Figure 3-3).
In this configuration, power passes directly to the connected load, bypassing the
inverter (via the AC Bypass Switch). This allows the inverter to be removed from
service without affecting the connected load. If the external source of AC
becomes unavailable while the Bypass Operation is selected, the load will be
dropped.
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Figure 3-2
Normal Operation
OFF
ON
60
60
OFF
ON
BOTH OFF TO DI SCON NEC T AC OUTPU T
INVERTER
Bypass 1
on to bypass
INVERTER
DISCONNECT 1
on for normal operation
Inverter in Circuit
Figure 3-3
Bypass Operation
OFF
ON
60
60
OFF
ON
BOTH OFF TO DISCONNECT AC OUTPUT
INVERTER
Bypas s 1
on to bypass
INVERTER
DISCONNECT 1
on for normal operation
Inverter out of Circuit