Outback Power Systems GS8048 - Manual (Page 18)

Planning
16 900-0021-01-00 Rev A
Maintenance Bypass Switching
Inverter systems are often equipped with AC maintenance bypass switches or interlocks. If the
inverter system ever needs to be shut down or removed, the AC sources and loads must be
disconnected. A bypass device allows the AC source to deliver power directly to the loads, bypassing
the inverter. This can minimize disruption to the system and avoids the need for extensive rewiring.
Figure 4 Bypass Switching
The GSLC (see page 12) can be equipped with bypass circuit breakers for this purpose. However, if
multiple Radian inverters are stacked in a single system, then the bypass function must be
simultaneous for all inverters. The GSLC bypass kits operate independently, not simultaneously, and
should not be installed in this kind of application. Both manual and automatic double-pole,
double-throw bypass switches are commonly available in a range of sizes and options. These are
highly recommended for systems with more 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 create an electric shock hazard or damage the
equipment.
Figure 5 Bypass Switching for Multiple Inverters
AC Source
AC Loads
GSLC Bypass
Inoperative
Radian
Inverter
Input Wiring Output Wiring
AC Source AC Loads
Output Wiring
Inactive Radian Inverters
Input Wiring
GSLC Bypass Devices
(not to be used)
External Bypass Device