3.0 Setup
31
© 2020 Sensata Technologies
• SETUP:
06
VAC
Dropout
–
03B VAC Dropout
– Selects the minimum
AC voltage that must be present on the input before the inverter connects to
the AC input and switches from Inverter mode to Standby mode. This setting
also determines the lowest AC voltage that is allowed before the charger
disengages and the inverter (if enabled) resumes powering the AC loads
from the inverter’s battery power—to protect AC loads during utility outages.
Setting for all models except dual-source inverters:
◊
Set VAC Dropout
(AC1 only) – Sets at what AC voltage—from
the HOT IN 1 to NEUT IN 1 terminals—will connect to or disengage
from the incoming AC.
Default setting:
80 VAC (150 VAC for export models)
Range:
60-100 VAC, UPS Mode
Press to save
SETUP
Press
Status...
06 VAC Dropout
Rotate to
Press to select
Rotate to
desired
selection:
Range: 60-100 VAC, UPS Mode (increments by 5 VAC)
Figure 3-16, SETUP: 06 VAC Dropout Selections
Setting for dual-source inverters (i.e., MSH4024RE):
Info:
Some Magnum inverters have two AC source inputs (AC1/
GRID and AC2/GEN), with
VAC Dropout
settings for each input. The
Set VAC Dropout
menu only displays both the
VAC Dropout
and
VAC
Dropout2
settings if connected to a dual-source model.
◊
Set VAC Dropout
(AC1 and AC2 inputs) – The
VAC Dropout
setting
determines at what AC voltage—from the AC1 to NEUT terminals—will
connect to or disengage from the incoming AC. The
VAC Dropout2
setting
determines at what AC voltage—from the AC2 to NEUT terminals—will
connect to or disengage from the incoming AC.
Default setting:
VAC Dropout=80 VAC
,
VAC Dropout2=80 VAC
Range:
60-100 VAC, UPS Mode
Where do I set my VAC Dropout?
It depends on the application and what
you are using as the AC source. The settings not only look at the incoming
voltage level to determine when to transfer, but also determine how quickly
the charger disconnects and starts inverting.
Use a VAC dropout setting from 60 VAC to 100 VAC (export models—dropout
from 110 VAC to 190 VAC) when the AC source may have
fl
uctuations in RMS
voltage. These settings attempt to prevent the charger from disengaging
unnecessarily due to poor quality voltage, and are highly recommended if
using a generator for charging. The transfer time from Standby mode to
Inverter mode is >16 milliseconds when using these settings.
Use the
UPS Mode
setting when the AC source is well regulated above 105
VAC (200 VAC for export inverter models) and the inverter loads are sensitive
to voltage
fl
uctuations. This setting is intolerant of voltage
fl
uctuations, so
the
UPS Mode
setting is not recommended when using a generator as your
AC source. The transfer time from Charge mode to Inverter mode is
≤
16
milliseconds when using this setting.
