Ac sources, Installation – Outback Power Systems GS8048 Installation Manual User Manual
Page 29
Installation
27
The Radian cannot take voltage other than 120/240 Vac. If wires are 120 Vac each, but do not measure
240 Vac from one to the next (such as two legs of a 3-phase source), it will not accept the power.
The AC source(s) can power both battery charger and loads if sized correctly. Use the source
amperage to determine actual maximum draw. Size input circuit breakers accordingly.
The terminals labeled
L1 and L2 Out are used to connect the Radian inverter to the load circuits.
These terminals also transfer power from an input source if it is available. They can carry up to 55
amps using the inverter’s transfer relay. Size load circuit breakers accordingly.
Three
Neu terminals are available. These terminals are electrically common. Any of them can be used
to connect to neutral wires from various parts of the system. The most common connections are to
the neutral bus on the main panel or utility grid service, the neutral bus on the output load panel, the
neutral bus in the GSLC, and the neutral wire from a generator.
A Ground TBB is also available if multiple ground connections are needed (see
AC Sources
The inverter’s transfer relay is normally set to provide inverter power to the output. When an AC
source is present and accepted, the transfer relay switches to transfer the AC source power to the
loads. (See the Radian Series Inverter/Charger Operator’s Manual for the inverter’s acceptance criteria.)
The Radian inverter has connections for two AC sources for ease of installation. Each source is
transferred with a separate relay. However, internally it can only connect to one AC source at a time. It
cannot use both utility grid and generator power at the same time. If presented with two sources of
power, its default setting is to accept utility grid. (See the MATE3 manual for instructions on changing
the source priority.)
Figure 16 AC Sources
The arrow between the output neutral and ground wires indicates that these two wires have been
bonded together, usually at the main electrical panel. Only one bond should be made between
neutral and ground at any time. See page 26. If a generator is present in a building-based installation,
the generator’s neutral and ground should be isolated.