Installation, Operation and Technical Manual Rectifier Technologies
158-1872-01 66 19-Feb-14
This screen is available only when BTC is active. Set
temperature level at which System Voltage is not corrected.
Range 18C to 27C. Note Compensation range is 10-35°C
The physical number of 2V cells in the battery. A typical
value range for a 48V system is between 22 and 24 cells.
This function is used for battery temperature compensation.
Please Note:
a) If there are no temperature sensors connected or if BTC is set to 0, the compensation function is
disabled. In this instance, the status message in the MCSU-4 home screen is FL or EQ instead of FLC or
EQC.
b) If the Battery temperature sensor is not connected, compensation is then based on the ambient
temperature sensor;
c) If both Ambient and Battery temperature sensors are connected, the compensation is based only on the
battery sensor.
d) If temperature compensation is activated, the SMR voltage setting is automatically adjusted by the
MCSU-4 on a regular basis.
Battery Charging Current Limit applicable for voltages below
Vdd. This parameter sets the maximum current which flows
into the batteries when the voltage across the two batteries
is less than Vdd, the deep discharge voltage.
Battery deep discharge voltage - Vdd.
Battery Charging Current Limit when the battery voltage is
between Vdd and the float voltage Vfl. This limit is normally
higher than the one for a deeply discharged battery.
System Float Voltage; this sets the system output voltage at
the output busbar terminals.
System Voltage Drop. This parameter is used to set the
maximum voltage that the individual rectifiers can output
over and above the programmed System Float voltage.
The System Voltage Drop parameter is calculated by summing the resistive voltage drop in each rectifier due
to output connector, output relay and passive current sharing output “slope” and the expected drop of the
busbars of the system. A typical value is 0.6V. For digital control, set the value for the drop to that expected
at nominal load.
Enable/disable equalisation charging. If Equalisation is
disabled, the following screens (up to the comment “End of
equalisation section”) will not appear.
Battery Charging Current Limit for battery voltages greater
than the float voltage. This applies when the batteries are
being equalised.
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