Setup
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2017 Sensata Technologies
Page 31
SETUP: 03 Charger Setup
• 03A AC Input Amps:
This setting ensures that the combined current draw from the battery
charger and the AC loads does not exceed the maximum input current that is available from
the incoming AC power. This setting is used to set that maximum input current level. Whenever
the incoming AC is connected and passing thru the inverter, the current from the incoming
AC used to power the AC loads and charge the batteries is monitored. If this current begins
to approach the
AC Input Amps
setting, the charger current is automatically reduced. This
ensures the AC loads have all the available current from the incoming AC power when needed.
If using a MSH-M or MSH-RE (Hybrid) inverter, the AC input settings also determine when
the battery current begins to operate in parallel with the incoming AC power to support the
inverter loads, known as Load Support. The Load Support feature uses additional power from
the inverter’s battery to run loads greater than what the incoming AC power can run alone,
and prioritizes the power of any external DC source (e.g., solar, wind, etc.,) over the incoming
AC power to run inverter loads. For more information, see the Load Support Mode section in
the MSH-M or MSH-RE Series Owner’s Manual.
Setting for all models except MSH4024RE:
◊
Set AC Input Amps
Default setting:
30 Amps
Range:
5-60 Amps
Settings for MSH4024RE:
◊
Set AC Input Amps (AC1 and AC2)
Default setting:
AC1 =
30 Amps, AC2 = 20 Amps
Ranges:
5-60 Amps
CAUTION:
Unless you have an MS Hybrid Series inverter/charger—which has the Load
Support feature—the
AC Input Amps
setting only limits the current to the battery, it
does not limit the current to the inverter loads. If the current from the loads on the
output of the inverter is greater than the circuit breaker rating on the incoming AC
source, you will experience nuisance tripping.
Where should I set AC Input Amps?
This setting needs to be set differently depending on your
inverter/charger model—as described below:
ME, MS, and RD Series:
These models connect to a single AC source and have two inputs (HOT
IN 1 and HOT IN 2), but the current is only monitored on HOT IN 1. On these models—when wired
as a dual-in con
fi
guration or as a single-in con
fi
guration with only the HOT IN 1 connected—the
AC Input Amps
setting should be set to the size of the AC circuit breaker that feeds the HOT IN
1 input. On these models, when wired as a single-in con
fi
guration with HOT IN 1 and HOT IN 2
jumped together, set the
AC Input Amps
setting to half (x½) the input breaker size—as half the
current passes through HOT IN 1 and the other half through HOT IN 2 simultaneously.
MS-AE and MS-PAE Series:
These models connect to a single AC source and have two inputs
(HOT IN 1 & HOT IN 2), with the current monitored on both inputs at the same time. Since the
input is from a single AC source, both of the input currents are added, then divided in half to
determine the
AC Input Amps
setting. If the input breaker is a dual-pole (120/240 VAC input), set
the
AC Input Amps
setting to the value of only one of the breaker poles (i.e., 30A dual-pole = 30A
setting). If the input breaker is a single-pole (120 VAC input) and connected to only one input, set
the
AC Input Amps
setting to one-half the input breaker size (i.e., 30A single-pole = 15A setting).
MS-E, MS-PE, MSH-M and RD-E Series:
These models connect to a single AC source and have
one input. Set the
AC Input Amps
setting to match the input AC circuit breaker size.
MSH-RE Series:
This model can connect to two AC sources and have two inputs (AC1 & AC2),
with the current monitored on each input separately. AC1 is set to the size of the utility breaker
feeding the AC1 input, and AC2 is set to the size of the generator’s breaker feeding the AC2 input.
MM, MM-AE and MMS Series (and any export version of these models):
These models
do not monitor current on the input, therefore cannot bene
fi
t from the
AC Input Amps
setting
or feature. On these models, even though the
AC Input Amps
setting may display and allow
selection/adjustment, this setting does not do anything to reduce the battery charger current.
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