Product Manual

Operation
900-0145-01-01 Rev B 23

Low Battery Cut-In
: The recovery point from Low Battery Cut-Out. When the DC voltage rises above this
point for 10 minutes, the error will clear and the inverter will resume functioning. This item is adjustable.
 Connecting an AC source for the Radian to charge the batteries will also clear a low battery error.

Output Voltage
: The AC output voltage can be adjusted. Along with small changes, this allows the inverter
to be used for different nominal (single-phase) voltages such as 220 Vac, 230 Vac, and 240 Vac.
IMPORTANT:
The output voltage can adjusted to a different nominal value for a particular region.
Making this change will not affect the default input voltage range accepted by the
inverter from an AC source. The input range must be adjusted manually. These changes
should be made at the same time. (See AC Source Acceptance on page 24.)

The inverter is also controlled by a high battery cut-out limit. If the DC voltage rises above this limit, the
inverter will immediately stop functioning and give a
High Battery V
error. This is one of the error messages
described on page 57. The shutdown occurs to protect the inverter from damage due excessive DC voltage.
It appears as an event on the MATE3 system display.
 For the Radian inverter, the high battery cut-out voltage is 68 volts. It cannot be changed.
 If the voltage drops below this point, the inverter automatically recovers.
AC Frequency
CAUTION: Equipment Damage
Setting the inverter’s output frequency to deliver 50 Hz to 60-Hz loads, or setting it to
deliver 60 Hz to 50-Hz loads, could damage sensitive devices. Make certain the
inverter’s output frequency matches the installation.
The inverter’s output can operate at a frequency of either 50 or 60 Hertz. This output frequency (and
the AC acceptance frequency) can be changed with the
Operating Frequency
menu item. This
requires high-level access. Due to the possibility of damage, access to this setting was restricted by
placing it in the
Grid Interface Protection
menu.
The installer password must be changed from the default in order to get access to this menu. Once
this password has been changed, the
Grid Interface Protection
menu can only be accessed by using
the installer password. This password can be changed in the system display.
See page 17 for more information on the
Grid Interface Protection
menu. See Table 17, which begins
on page 67, for the location of the
Operating Frequency
menu item.
Search
An automated search circuit is available to minimize the power draw when no loads are present.
When enabled, the inverter does not always deliver full output. The output is reduced to brief pulses
with a delay between them. These pulses are sent down the output lines to see if a resistance is
present. Basically, the pulses “search” for a load. If a load is detected on the output, the inverter’s
output increases to full voltage so that it can power the load. When the load is turned off, the inverter
“goes to sleep” and begins searching again.
The sensitivity of Search mode is in increments of approximately 0.1 Aac. The default is 6 increments,
or about 0.6 Aac. A load which draws this amount or greater will “wake up” the inverter.
Hz