Outback Power Systems GS4048A Operators Manual - Manual (Page 26)

Operation
24 900-0161-01-00 Rev A
AC Current Settings
The AC current settings, Grid Input AC Limit and Gen Input AC Limit, control the amount of current
that the inverter draws from the source(s). When using either of the Radian’s AC inputs, the
appropriate setting limits the input. Adjust these settings to match the input circuit breakers.
 The adjustment is meant to protect a generator or source that cannot supply enough current for both
charging and loads. If the combined charging and loads exceed the setting, the inverter will reduce its
charge rate and give priority to the loads. If the loads exceed this number on their own, the charge rate will
be reduced to zero.
 The Radian’s battery charger and grid-interactive function have individual settings. However, the AC
Limit settings can also limit the charging or selling current.
 The Support input mode allows the Radian to support the AC source with battery power. See page 14.
 The AC input current is used to power both loads and battery charging. The combined amount should not
exceed the size of the AC overcurrent device or AC source. These devices should be sized appropriately
during planning and installation of the inverter system.
 If multiple parallel inverters are installed with an AC source of limited amperage, the total combined
amperage settings for all units must be less than the AC input circuit. The Configuration Wizard in the
MATE3 can perform this calculation. However, the inverters do not perform this calculation. If the MATE3 or
the Configuration Wizard are not used, divide the input size by the number of inverters and assign an equal
part of the amperage to each port.
AC Source Acceptance
The input source must meet the following specifications to be accepted. This is true in all modes
except
Grid Tied:
 Voltage ( GRID input): 108 to 132 Vac (default for both L1 and L2)
 Voltage ( GEN input): 108 to 140 Vac (default for both L1 and L2)
 Frequency (both inputs): If the output frequency is set to 60 Hz (default), the input acceptance range is 54 to
66 Hz. If output frequency is set to 50 Hz, the input range of acceptance is 45 to 55 Hz.
 See Table 16 on page 65 for the available selections for these items.
When these conditions are met, the inverter will close its transfer relay and accept the input source.
This occurs after a delay which is specified below. If the conditions are not met, the inverter will not
accept the source. If it was previously accepted and then rejected, the inverter will open the relay and
return to inverting power from the batteries. This occurs after a specified transfer delay, which is an
adjustable menu item.
IMPORTANT:
The Radian’s output voltage can adjusted to a different nominal value for a particular
region. (See page 23.) If this occurs, the source acceptance range should be adjusted to
match this nominal value or the inverter may not accept the new source normally.
 The voltage limits can be adjusted to allow (or exclude) a source with weak or irregular voltages.
These items are adjustable in the appropriate menu of the MATE3 (
Grid AC Input Mode and Limits or
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