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Ascend Single Phase Charger Operation Manual
common alarm relay will go the de-energized alarm state. Many of the alarm set points and delays can
be modified via the Setup -> Alarm Setup screen.
7.5.1. Low DC Voltage
If the DC output voltage goes below the set point threshold (factory default 120Vdc), the Low DC alarm
will be activated. The Low DC voltage alarm set point may be configured between 100Vdc and 130Vdc
with a delay up to 250 seconds. An alarm relay may be configured for remote annunciation. normal
operation the alarm relay is energized.
7.5.2. Pos/Neg DC Ground Detect
The control senses a leakage path from DC
bus to earth by monitoring the DC voltage
from positive and negative to earth ground.
When the DC voltage to ground increases
above the set point (factory default 30Vdc)
the Positive or Negative Ground detect
alarm will be activated. The Positive and
Negative to ground alarm set points may be
adjusted between 20Vdc and 90Vdc with a
delay up to 250 seconds. An alarm relay for
both the Positive and Negative Ground
detect may be configured for remote
annunciation, under normal operation the
alarm relay is energized.
The DC Ground Detect circuit may be disabled by removing the J4 connector on PCB3 located on the
inside top left of the enclosure.
7.5.3. High DC Voltage
If the DC output voltage goes above the set point threshold (factory default 144Vdc), the High DC alarm
will be activated. The High DC voltage alarm set point may be configured between 120Vdc and 150Vdc
with a delay up to 250 seconds. An alarm relay may be configured for remote annunciation, under
normal operation the alarm relay is de-energized.
7.5.4. Battery Near Exhaustion
If the DC output voltage goes below the set point threshold (factory default 110Vdc), the Battery Near
Exhaustion alarm will be activated. The Battery Near Exhaustion voltage alarm set point may be
configured between 99Vdc and 130Vdc with a delay up to 250 seconds. An alarm relay may be
configured for remote annunciation, under normal operation the alarm relay is energized.
7.5.5. AC Input Failure
If power is not available to all modules, an AC Input Failure alarm is activated. The main display will
indicate the failure and the Fault Indicator will be on. The AC Input Failure alarm has factory set delay of
5 seconds, the delay may be configured up to 250 seconds. An alarm relay may be configured for remote
annunciation, under normal operation the alarm relay is energized.
If the AC Input breaker position option is included the AC Input breaker must be closed for the alarm to
activate.
37
95-100167 Rev A
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