Outback Power Systems GS Load Center Installation Manual - Manual (Page 45)

Wiring
900-0123-01-00 Rev C 43
In Figure 39, when Switch 1 is on (normal operation), the inverter’s output sends power to the loads.
Switch 2 is off, preventing the inverter from sending power back to the AC source (backfeeding).
When Switch 2 is on (bypass operation), the AC source sends power directly to the loads. Switch 1 is
off, removing the inverter’s output from the loads. This also prevents the AC source from backfeeding
the inverter. With the inverter removed from the circuit, maintenance can be performed as necessary.
Figure 39 Bypass Switches
The GSLC can be ordered with bypass circuit breakers for this purpose, or it has a bypass option (the
GS-IOB-120/240VAC or GS-IOB-230VAC) which can be installed.
Figure 40 OutBack Bypass (split-phase)
IMPORTANT:
If multiple Radian inverters are stacked in a single system, then these devices
cannot be used. The bypass function must be simultaneous for all inverters. The
GSLC bypass kits operate independently, not simultaneously.
In a new system with multiple Radian inverters, the basic GSLC should be used in conjunction with an
external assembly of this kind, as shown in Figure 41. The GS-IOB kits should not be installed, or if
previously installed, should be removed and all wires disconnected.
OutBack does not offer a solution for bypassing multiple inverters. However, electrical suppliers offer
both manual and automatic double-pole, double-throw bypass switches in a range of sizes and
options. These are highly recommended for systems larger than a single inverter.
WARNING: Shock Hazard or Equipment Damage
Using independent bypass devices on multiple inverters can result in power being routed
to inappropriate places. This could lead to an electric shock or to equipment damage.
AC Loads
Switch 1
Switch 2
Inverter Output
Bypass AC Source
Switch 1 and Switch 2 are prevented
from being on at the same time by the
Mechanical Interlock. Although both
switches can be off, only one can be on.
In OutBack bypass assemblies, circuit
breakers are used instead of standard
switches.
The inverter may use an AC
source which powers the
inverter’s output. The bypass
assembly does not disconnect
the inverter’s input.
AC Source
AC Loads
GSLC Bypass
Disconnected
Radian
Inverter
Input Wiring Output Wiring