Operation
16
900-0198-01-00 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. Adjust these settings to match the input circuit breakers.
The adjustment is meant to protect a generator or shore supply 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 inverter’s battery charger has individual settings. However, the
AC Limit
settings can also limit the charging
or selling current.
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 MATE3 Configuration Wizard can perform this
calculation. However, the inverters do not perform this calculation. If the Wizard or similar tools 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.
Voltage: 108 to 140 Vac
Frequency: 54 to 66 Hz
See the menu tables which begin on page
48
for voltage programming information.
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.
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
Gen AC Input Mode and Limits
). The settings are titled
Voltage Limit Lower
and
Upper
. There can be side
effects to changing the range of allowed voltages.
Each of the AC input selections has a settable
Connect Delay
. This is intended as a warmup period which allows
an input source to stabilize before connection.
The default setting for the
Grid
selection is 0.2 minutes (12 seconds).
The default setting for the
Gen
selection is 0.5 minutes (30 seconds).
These items are adjustable in the appropriate menu of the MATE3 (
Grid AC Input Mode and Limits
or
Gen AC Input
Mode and Limits
).
NOTE:
Several items external to the inverter may prevent the inverter from accepting AC
power even if electrical conditions are met. An example is the MATE3’s AC
INPUT
hot
key menu, which can disconnect all inverters when set to
Drop
.
A
A
A
