©1999 Trace Engineering
AC Disconnect Module
The AC Disconnect is a manual bypass switch that allows the inverter to be removed from the circuit
without de-energizing the connected load. The Power Panel comes with either a single breaker pair for single
inverter applications, or two breaker pairs (L1 and L2) to accommodate two inverters.
The AC Disconnect Module is wired between the primary ac source (utility power or generator) and the
inverters ac input and output. A lockout rocker allows only one breaker to be ON at any given time.
During normal operation, ac power passes from the power utility through the inverter to the ac loads. The
inverter monitors the incoming power and keeps the batteries charged. If utility power fails, the inverter
switches to battery power and continues to power the load. In dual inverter Power Panel installations, a set of
breakers control the bypass function for each inverter independently. If one inverter is bypassed for servicing,
the second inverter will continue to power the loads connected to it.
In the event of an inverter failure, the breakers can be switched to the Inverter Bypass position which
allows the ac loads to be powered directly from utility power. The inverter can then be removed for servicing
without affecting the connected loads.
To de-energize both circuits, switch both breaker pairs to the OFF position.
INV 1
60
OFF
DD
OFF
60
0N
INV 2
60
OFF
D
OFF
D
60
0N
Figure 26
AC Disconnect Breakers (Dual Inverter Model)
AC Disconnect/Bypass
for Inverter 1
AC Disconnect/Bypass
for Inverter 2
3.0 OPERATION
24
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