Murphy EMS-GC10, Operator'S Manual

Page: 77 / 183

Section 75 00-02-0878
2013-03-07 - 71 -
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 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.
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.