GE Industrial Solutions Galaxy Vector Rack Mounted Controller J85501M-1 - Manual (Page 29)

Galaxy Rack-Mounted Vector Controller J85501M-1
Issue 2 January 2008 Operation 3 - 1
3 Operation
Office Alarm
Contacts
The J85501M-1 Vector Controller issues PMJ, PMN, MJF, BD,
ACF and HV/2ACF/VLV office alarms from the BUJ board.
Refer to Table 2-G for a description of their output terminals.
Refer to Table 3-A for a listing of the various available alarms.
Refer to Table 3-B for a listing of alarm relays and their
associated front panel LEDs.
Alarm
Descriptions
To see active alarms, press the Active Alarm softkey, then use
the
∧ or ∨ keys to page through alarms. See Tables 3-A and 3-B.
The alarms are listed in order of severity. Some abbreviations are
required to fit the LCD screen.
Very Low Voltage
Alarms and Battery
on Discharge
When system voltage drops below the battery voltage, the
batteries start providing current to the load. Any time that the
plant voltage is below the threshold selected for BD, the Battery
on Discharge alarm activates. If the plant voltage continues to
drop, a second, lower threshold can be reached, activating a Very
Low Voltage alarm. These thresholds can be changed in the
configuration menu. S1.5 set to “1” will allow the relay
dedicated for HV/ACF/VLV to be asserted for the VLV
condition.
Note that a BD alarm does not necessarily mean that the batteries
are discharging, only that the present voltage is lower than the
set point for this alarm. This alarm may be activated by an
incorrectly set BD threshold or plant voltage set point.
Following the restoration of ac power after a battery discharge of
significant depth, this alarm remains active for some time during
the recharge period, until the batteries have recharged to a level
which allows the plant voltage to rise above the BD threshold.