OutBack Power GS-IOB-230VAC, Руководство оператора

Страница: 16 / 76

Operation
12
900-0145-01-00 Rev A

When power is returned to the utility grid, it may be possible to make the utility meter run backwards. The
net result would be to sell power to the utility company. However, this depends on whether there are other
loads in the system. Loads on the main panel (not on the inverter’s output) may consume this power as fast
as it is generated, preventing the meter from running backwards. In this case, the result of selling would be
to reduce the consumption of AC power, not reverse it.

The amount of power an inverter can sell is not equal to its specified output wattage. Its maximum selling
current is 30 Aac. The overall power will depend on the utility grid voltage. For example, if the voltage is
231 Vac, the inverter will sell 6.93 kVA. If the voltage is 242 Vac, the inverter will sell 7.26 kVA. Additionally,
output will vary with inverter temperature, battery type, and other conditions.

A good guideline is that the renewable source should be sized to continuously deliver no more than
85% of the inverter’s specified wattage (per inverter, in a multi-inverter system).

This recommendation is specifically for the inverter’s grid-interactive function. In some cases, the
source may be sized larger to account for environmental conditions or the presence of DC loads. This
depends on individual site requirements.

The grid-interactive function can only operate while the utility grid power is stable and within specific limits.

In Grid Tied mode, the inverter will operate in accordance with the Grid Interface Protection settings.
The default settings and ranges are listed in Table 10, which begins on page 47.
If the AC voltage or frequency vary outside the Grid Interface Protection limits, the inverter will
disconnect from the utility grid to prevent selling under unacceptable conditions. These limits override
the AC source acceptance limits described on page 17, which are used in other input modes.

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 43. Disconnect messages are listed on page 42. 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 47 and 49 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 in AS 4777.3 for Australia. If this is the case, it
may be necessary to look up the requirements for this standard and program them accordingly.
STAGE 1 Voltage (basic settings) Frequency Trip

Over Frequency Trip (Hertz)

Over Frequency Clearance Time (seconds)

Under Frequency Trip (Hertz)

Under Frequency Clearance Time (seconds)
NOTE: The Frequency Trip settings are dependent on
the inverter’s operating frequency, which must be set
correctly. See pages 7 and 49.
Mains Loss

Clearance Time (seconds)

Reconnect Delay (seconds)

Over Voltage Trip (AC Voltage)

Over Voltage Clearance Time (seconds)

Under Voltage Trip (AC Voltage)

Under Voltage Clearance Time (seconds)
STAGE 2 Voltage (if required by utility)

Over Voltage Trip (AC Voltage)

Over Voltage Clearance Time (seconds)

Under Voltage Trip (AC Voltage)

Under Voltage Clearance Time (seconds)
See Table 10 for the default settings and ranges.