Brochures and Data Sheets

NetSure
™
ACU+ Controller (Advanced Control Unit Plus)
User Instructions, UM1M820BNA (Issue AK, March 3, 2014)
Spec. No: 1M820BNA, 1M820DNA Code: UM1M820BNA
Model No: M820B, M820D Issue AK, March 3, 2014
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1. Navigate to Main Menu / Settings / Battery / Test.
2. Navigate to and set the “Test End Volt” to the same value
as the end voltage of the existing power system.
3. Navigate to and set the “Test Volt Lmt” to the same value
as the test voltage of the existing power system.
4. Using the Web Interface (Maintenance / Edit PowerSplit),
select the ACU+ digital input connected to the existing
systems battery test control circuit.
Note:
Other settings in this menu regarding “Battery Test” are
inactive.
Note:
Battery test is controlled by the existing power system via an
incoming digital signal. The system will remain at battery test
as long as this signal is active.
LOW VOLTAGE DISCONNECT SETUP
If low voltage disconnect functions are to be used, they must be
implemented in the existing power system and signals from its
control unit must be connected to the ACU+.
1. Using the Web Interface (Maintenance / Edit PowerSplit),
select the ACU+ digital inputs connected to the low
voltage disconnect control circuits.
TEMPERATURE COMPENSATED BATTERY CHARGE
There is no possibility to activate the “Temperature Compensated
Battery Charge” function when the ACU+ power system is
configured for “Power Split” mode.
However, the possibility to change the “Delta Voltage” enables the
ACU+ power system to follow the existing power system that has
the functionality to a certain limit.
Example: The “Delta Voltage” in the ACU+ power system is set to
1.0V. The existing power system is set to compensate 3.0
mV/cell/°C. This means that the ACU+ power system can follow the
temperature compensation of the existing ;power system in the
range of ±14°C from the set normal battery temperature (3.0 mV x
24 cells x 14°C = 1.008 V).
Verifying the Operation of the Power Split Feature
After programming the “Power Split” feature, verify its operation
as follows.
1. In a Power Split application where the ACU+ power
system is taking all of the load and the rectifiers in the
existing power system are all in the standby mode, use an
external dry load bank of sufficient capacity to increase
the load on the ACU+ power system over the “SLAVE
CURRENT LIMIT” value.
a. Verify that the ACU+ power system limits the total
output of its rectifiers to the current equivalent to
this programmed percentage.
b. Verify that the ACU+ power system lowers its output
voltage by the value of the programmed “DELTA
VOLTAGE”.
c. Verify that the rectifiers in the existing power system
take the additional load as the load increases pass
the “SLAVE CURRENT LIMIT” value.
d. Further increase the load in order to exceed the total
capacity of the rectifiers in the existing power
system (or shut down some of the rectifiers in the
existing power system if the capacity of the external
dry load bank is not sufficient). Verify that the ACU+
power system starts taking the additional load as
soon as the total capacity of the rectifiers in the
existing power system is exceeded.
2. In a Power Split application where the ACU+ power
system is taking only part of the load (operating
continuously at the current level equivalent to the
programmed “SLAVE CURRENT LIMIT” percentage) and
the rectifiers in the existing power system are taking the
rest of the load, use an external dry load bank of sufficient
capacity to increase the load in order to exceed the total
capacity of the rectifiers in the existing power system (or
shut down some of the rectifiers in the existing power
system if the capacity of the external dry load bank is not
sufficient).
a. Verify that the ACU+ power system starts taking the
additional load as soon as the total capacity of the
rectifiers in the existing power system is exceeded.