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Operation
3–4 973-0031-01-01 Rev A
AC Input/Output Off
No power to the load or inverter (Figure 3-4).
In this configuration, power from both the external sources of AC and the inverter
is removed from the loads. This allows the inverter that is connected to the AC
Bypass breaker to be removed for service.
‘
Dual Inverters: 240 Vac Loads
Figure 3-4
AC Output OFF
WARNING: Fire Hazard
In a series-stacked, inverter installation (120/240 Vac) with an AC Bypass switch for each
inverter, both AC Bypass switches must be in the same position.
If the AC Bypass switches are not in the same position, the resulting AC output of the two
AC Bypass switches may not be 180° out-of-phase from each other. This can result in
excess current on the neutral wire creating a potential fire hazard.
This can also result in less than 240 Vac output. Loads requiring 240 Vac will not run.
Some 240 Vac equipment may also be damaged if one AC “leg” is lost.
OFF
ON
6060
OFF
ON
BOTH OFF TO DISCONNECT AC OUTPUT
INVERTER
By pa s s 1
on to bypass
INVERTER
DISCONNECT 1
on for normal operation
AC Input from
Grid or Gen
Both external AC source and
the Inverter are OFF
AC Output to Loads