Product Manual

Operation
900-0145-01-01 Rev B 17
 If the inverter stops selling or disconnects due to Grid Interface Protection, the MATE3 will show the
reason. Sell Status messages are listed on page 61. Disconnect messages are listed on page 60. Often
these messages will be the same.
 Due to varying requirements in different locations around the world, the grid-interactive settings are
adjustable. However, this is only available to operators with installer-level access. There are firm rules
concerning the acceptable voltage range, frequency range, clearance time during power loss, and
reconnect delay when exporting power back to the utility. Generally it is expected that the settings
cannot be altered by the end user. For this reason, it is necessary to change the installer password from
the default in order to get access to these settings. Once this password has been changed, the settings
can only be accessed by using the installer password. See pages 67 and 69 for more information.
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 below are the selectable options for Grid Interface Protection. It may be
necessary to provide these options to the utility company to make certain their standards are met.
The utility may simply name a standard to be followed, as with AS 4777.3 for Australia. 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 17 on page 67 for the default settings and ranges.
UPS
In
UPS
mode, the Radian’s parameters have been optimized to reduce the response and transfer
times. If the utility grid becomes unstable or is interrupted, the Radian can transfer to inverting in
minimal 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.)
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 69.
Mains Loss

Clearance Time (seconds)

Reconnect Delay (seconds)