Alpha Technologies Cordex CXCRF 48-300W - Manual (Page 37)

0300072-J0 RevA Page 33 of 46
Figure 30: Battery setup
Battery pre-alarms
Alarms are generated when the DC Bus voltage reaches one of the pre-set alarm levels. In this case, no action
is initiated other than an alarm (major, minor or battery) being generated on the MCU LEDs and the
corresponding relay.
4.3.5 LVD Trip Level
During a battery discharge the internal LVD opens when the battery low voltage trip level is reached. The factory
settings for this are the following:
Description MCU settings Comments
Factory setting trip level 43.2Vdc LVD opens when the value is reached after
the time given in seconds
Factory setting delay 0 second
LVD when MCU removed CLOSED opens at typ. 42Vdc
Table 6: LVD Trip level
NOTE:
When the MCU is removed from the shelf (e.g. for adjustment or replacement), the LVD
remains CLOSED and when the mains is absent (shelf working on the battery) the LVD will
open at approximately 42 V. The LVD will re-close automatically when the mains is restored.
4.3.6 Rectifier Settings
It is recommended that the minimum quantity of rectifiers needed in the system is defined in the MCU in order to
generate an alarm, if one or more rectifiers are missing.
Select the Edit Mode and go to the configuration tab of the DC System, change the number of rectifiers, click on
“Modify” and save the new settings. The default setting is “0”.
Figure 31: Remote off – Rectifiers menu