Product Manual

Operation
12 900-0161-01-01 Rev B
NOTE:
 The input terminals are labeled for grid and generator due to common conventions, not
because of inverter requirements. Each input can accept any AC source as long as it
meets the requirements of the Radian inverter and the selected input mode. If
necessary, the G
EN terminals can accept grid power. The opposite is also true.
 However, if using the Gen Alert or AGS functions, the generator must use the G
EN
terminals. See page 39 for details on Gen Alert and the system display literature for
details on AGS.
When multiple inverters are stacked together in parallel, the master inverter’s input mode is
imposed on all slaves. (See the stacking section in the
Installation Manual
.) The slave settings
are not changed; they retain any mode that was previously programmed. However, the slave
will ignore its programmed mode and use that of the master. This also applies to any
parameters in the mode menu (
Voltage Limit
,
Connect Delay
, and so on).
The following pages compare the various features of each input mode.
Generator
The
Generator
mode allows the use of a wide range of AC sources, including generators with a
rough or imperfect AC waveform. In other modes, a “noisy” or irregular waveform may not be
accepted by the inverter. (Self-excited induction generators may require this mode when used
with the Radian.)
Generator
allows these waveforms to be accepted. The charging algorithm
of this mode is designed to work well with AC generators regardless of power quality or
regulation mechanism. The generator must still comply with the inverter’s nominal input
specifications. (See page 25.)
BENEFITS
:

This mode enables the battery charging function to tolerate a wider range of generator performance
and waveform irregularities than other modes. See page 26 for recommended parameters for sizing
a generator.

Generator
mode can also be used to accommodate grid variability or irregularities. The inverter will
not export power to the grid in this mode.

A programmable delay timer is available which will allow a generator to stabilize before connection.
In MATE3-class system displays, this menu item is
Connect Delay
. It is available in both the
Grid
AC Input Mode and Limits
and the
Gen AC Input Mode and Limits
menus, depending on which
input is being programmed.
NOTES
:

Any AC fluctuations that are accepted by the inverter will be transferred to the output. The loads
will be exposed to these fluctuations. It may not be advisable to install sensitive loads under
these conditions.

The name of
Generator
mode does not mean that the inverter requires a generator input when
using this mode. The use of this mode does not require the use of the
G
EN
input terminals; either
input can be used. Conversely, the inverter is not required to be placed in this mode just because a
generator is installed.