Emerson Lorain CIP 4890 AP6C55CB User Manual page 86

86 Configuring and operating the system
Important parameters need to be entered in the General Battery Test Settings
box of screen 18 for the tests to be valid:
Clicking on Battery Test in the submenu screen for Battery Functions will
display the following screen.
UM6C55C (P7000597)
Standard 10.00 (March 2008)
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Note: A battery test cannot be activated if there is an ongoing major or
minor alarm.
The "End Voltage (V)": this is the expected battery voltage at the end
of the programmed test time (discharge duration), for the actual load
current on the system, according to the battery manufacturer's
discharge curve. If the battery capacity is lower and/or the load on
the system higher than expected, this voltage will be reached before
the end of programmed test time and the test will be terminated.
The "Rectifier Voltage During Test (V)": this is the voltage at which
the rectifiers are placed in standby during the test, in order to take
over should the battery voltage lower beyond the "End Voltage (V)"
for any reason (ex.: very bad battery). This value must be lower than
the "End Voltage (V)" value.
The "Test Time (min)": this is the maximum duration of the test in
minutes. It is the expected time period to reach the programmed "End
Voltage (V)", for the actual load current on the system, according to
the battery manufacturer's discharge curve.
The "Battery Capacity Discharge Limit (%)" is the percentage of the
nominal capacity to which the battery should be discharged during
the test. This value is obtained by using the formula % = I x T
where I is the actual load current on the system, T is the discharge
time to 1.75 V pc, and NC is the nominal capacity of the battery. For
example, in screen 18, a load of 50 A was used for a 60 minute test
time on a 100 Ah battery, thus giving 50 x 60 = 30.
The "Nominal Capacity (Ah)" is the capacity of the battery, in
ampere-hour, for the calculated discharge time (ex.: 3 hours or 8
hours), according to the battery manufacturer's specifications.
NC
100
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