6.34 Battery test
This function gives the possibility to test the condition of the battery. The battery test can be initiated with a digital input and is
available when the genset is in semi-auto and auto mode.
If a mains failure occurs during the battery test sequence, the test will automatically be interrupted, and the automatic mains failure
start up sequence will be activated.
During the test, the battery voltage will decrease and an alarm will occur if it drops to the set point that has been configured in
Battery test (parameter 6411).
t
BAT TEST
t
BAT TEST
Cancel test
U
BATTERY
t
Alarm
Test 2Test 1
The drawing shows that test #1 is carried out without a large voltage drop of the battery voltage, whereas test #2 reaches the alarm
set point. As there is no reason to wear the battery down even more, the test stops when the battery test alarm occurs.
The test is typically used at periodical intervals, for example, once every week. The engine must be at a standstill when the test is
started. Otherwise, the test command will be ignored.
The stop relay will act depending on the coil type:
• Stop coil: The stop relay activates during the test.
• Run coil: The stop relay stays deactivated during the test.
The drawing below shows that when the test is started, the start relay activates, making the engine turn. The engine will turn in the
time period that has been configured in Battery test (parameter 6412).
Start relay
Run coil
Stop coil
or
Start test
Battery test “X + Start sequence”
If the set point in Battery test (parameter 6413) has been configured to X + Start sequence, the genset will run the defined start
attempts (without activating run coil). This function is used to test that the battery can withstand more than one start attempt.
DESIGNER'S HANDBOOK 4189341275A EN Page 153 of 196
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