Product Manual

900-0145-01-01 Rev B 13
Operation
Inverter Functionality
The inverter is capable of being used for many applications. Some of the inverter’s operations occur
automatically. Others are conditional or must be enabled manually before they will operate.
Most of the inverter’s individual operations and functions can be programmed using the system
display. This allows customization or fine tuning of the inverter’s performance.
The Radian inverter has two sets of input connections, which are labeled
Grid
and
Gen
. Two different
AC sources can be connected during inverter installation.
Before operating the inverter:
The operator needs to define the application and decide which functions will be needed. The Radian
inverter is programmed with seven AC input modes. Each mode has certain advantages which make it
ideal for a particular application. Some modes contain functions unique to that mode.
The modes are described in detail following this section. To help decide which mode will be used, the
basic points of each mode are compared in Table 1 on page 21.
Apart from the input modes, Radian inverters possess a set of common functions or operations. These
operations are described in detail beginning on page 22. Most of these items operate the same
regardless of which input mode is selected; however, this is not always true. The exceptions are noted
where appropriate.
NOTE:
The Radian’s battery charger uses the same programming and settable limits regardless of
which input is used. It does not have independent charger settings on each input.
Each distinct mode, function, or operation is accompanied by a symbol representing the inverter and
that operation:
The symbols may have other features depending on the operation.
Description of AC Input Modes
These modes control aspects of how the inverter interacts with AC input sources. Each mode is
intended to optimize the inverter for a particular application. The names of the modes are
Generator
,
Support
,
Grid Tied
,
UPS
,
Backup
,
Mini Grid
, and
GridZero
. The modes are summarized and compared
in Table 1.
Both of the Radian’s inputs,
Grid
and
Gen
, can be programmed for separate modes.

The
Grid
input can be set in the
Grid AC Input Mode and Limits
menu.

The
Gen
input can be set in the
Gen AC Input Mode and Limits
menu.
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
Gen
terminals can
AC IN
AC OUT
DC
T
RANSFER
These items represent the input from the AC
source, the output to the AC loads, DC functions
(inverting, charging, etc), and the transfer relay.
Arrows on each symbol represent power flow.