Summary Of Operating Limits; Limiting Charge Current (Multiple Inverters); Table 19 Operating Limits For All Fxr Models - Outback Power Systems FXR2012E Operator's Manual

Summary of Operating Limits

Severe conditions cause the inverter to limit its output or shut down for protection. The most
common conditions are high voltage, low voltage, and temperature. The limits for these conditions
are summarized in Table 19. See pages 62 and 64 for more information on these conditions and the
warning or error messages which accompany them.
Voltage Limits
Limit
High Battery
Low Battery (default)
Temperature Limits
Limit
Over Temperature error
Reduced charging or selling
Internal Fan

Limiting Charge Current (Multiple Inverters)

It is not advisable to set Charger AC Limit less than 6 Aac in a stacked system. The Power Save
function requires the master to activates the slave chargers in sequence only when the charge current
exceeds 5 Aac. If the setting is less than 6, Power Save will not activate any other chargers. For more
information on this function, see the Power Save section beginning on page 46.
When the Charger AC Limit setting is 6 Aac or more, other active chargers add the same amount to the
total. The total current equals the Charger AC Limit setting times the number of active chargers. In
some systems, lower currents may be required due to battery bank size or other reasons. To achieve
lower currents, chargers can be individually set to Off so that the master inverter does not activate them.
(The global Charger Control On only enables inverters not individually set to Off.) Combining the
charger limit settings with a reduced number of chargers allows better control over the current.
In Table 20, Max Charge Adc shows examples of DC charging values which may be recommended for
a battery bank. Aac converts these values into AC amperes.
On provides recommendations for the smallest number of chargers in operation. Set recommends
the inverter Charger AC Limit setting. Note that this table specifies the number of chargers to leave
on . All other chargers should be turned off using the Charger Control menu item. (See the menu
tables beginning on page 76 to locate this command in the menu structure.)
The lowest Adc figures in this table allow for a single inverter to perform all charging. All other
inverters would be turned off. The highest Adc figures are for the maximum of ten stacked chargers.
The recommended settings ensure the charging will not exceed a designated current. The amount is
likely to be less.
900-0169-01-00 Rev A
Table 19 Operating Limits for all FXR Models
12-Volt Model
Adjustable Off
No >17 Vdc
Yes >10.5 Vdc
Transformer
<125°C
<50°C
24-Volt Model
On Off
<17 Vdc >34 Vdc
<12.5 Vdc >21.0 Vdc
Output FETs
>125°C <95°C
>120°C >90°C
>60°C <50°C
Specifications
48-Volt Model
On Off
<34 Vdc >68 Vdc <68 Vdc
<25.0 Vdc >42.0 Vdc <50.0 Vdc
Capacitors
>95°C <95°C >95°C
>90°C
>60°C <50°C >60°C
On
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