Outback Power Systems GS4048A Operators Manual - Manual (Page 19)

Operation
900-0161-01-00 Rev A 17
∼ Before operating in Grid Tied mode, contact the utility company that provides power to the installation.
They can provide information regarding the rules that must be followed in order to export power back
to the utility. The items in the following list are the selectable Grid Interface Protection options. The
utility company may need to review these items to make certain their standards are met.
The utility may simply name a standard to be followed, as with UL1741 for the United States. It may be
necessary to look up the requirements for a local standard and program them accordingly.
STAGE 1 Voltage (basic settings)
 Over Voltage Clearance Time (seconds)
 Over Voltage Trip (AC Voltage)
 Under Voltage Clearance Time (seconds)
 Under Voltage Trip (AC Voltage)
STAGE 2 Voltage (if required by utility)
 Over Voltage Clearance Time (seconds)
 Over Voltage Trip (AC Voltage)
 Under Voltage Clearance Time (seconds)
 Under Voltage Trip (AC Voltage)
See Table 16 on page 65 for the default settings and ranges.
UPS
In UPS mode, the Radian’s parameters have been optimized to reduce the response time. If the utility
grid becomes unstable or is interrupted, the Radian can transfer to inverting with the fastest possible
response time. This allows the system to support sensitive AC loads without interruption.
BENEFITS:
 Constant power is provided to the loads with virtually no drop in voltage or current.
NOTES:
 Due to the need for the Radian inverter to react quickly to AC source fluctuations, it must remain fully active
at all times. The inverter requires a continuous consumption of 42 watts.
 For this reason, the Search function does not operate in this mode. (See page 23.)
Backup
The Backup mode is intended for systems that have utility grid available as the primary AC source.
This source will pass through the Radian inverter’s transfer circuit and will power the loads unless
utility power is lost. If utility grid power is lost, then the Radian inverter will supply energy to the loads
from the battery bank. When the utility power returns, it will be used to power the loads again.
BENEFITS:
 This mode will continuously maintain the batteries in a fully-charged state, unlike the Support mode. It
does not have the overhead consumption of the UPS mode.
Failure
Failure
Frequency Trip
 Over Frequency Clearance Time (seconds)
 Over Frequency Trip (Hertz)
 Under Frequency Clearance Time (seconds)
 Under Frequency Trip (Hertz)
NOTE: The Frequency Trip settings are
dependent on the inverter’s operating frequency,
which must be set correctly. See pages 9 and 67.
Mains Loss
 Clearance Time (seconds)
 Reconnect Delay (seconds)