GE Industrial Solutions Galaxy Vector Rack Mounted Controller J85501M-1 - Manual (Page 30)

Galaxy Rack-Mounted Vector Controller J85501M-1
3 - 2 Operation Issue 2 January 2008
BD threshold default is set at 25.54V standard in 24V systems,
and 51.1V in 48V systems with slope thermal compensation
disabled. In systems with slope thermal compensation, the BD
threshold should be 0.5V below the slope upper temperature
voltage for 24V systems, and 1.0V below the slope upper
temperature voltage for 48V systems. The slope upper
temperature equals:
Float Set Point - (number of cells) · E · (F-D)
See Figure 3-1 for system settings E, F, and D
These levels generally avoid nuisance alarms from transient
conditions yet provide alarm indications early in a true BD
event, so that sufficient time is provided for maintenance
personnel to respond before battery reserve is exhausted. VLV
should be activated towards the end of the battery reserve
voltage to indicate a critical service condition.
Table 3-A: Alarm Identification Standard Assignments
Alarm Description Alarm Status Front Panel LED GCM Relay
No active alarms present Norm Green None
Very low voltage Major Red None
Battery on discharge Major Red BD
High float voltage Minor Yellow None
Very high voltage Major Red HV
Voltage sense fuse alarm Major Red None
AC fail Minor Yellow ACF
Multiple AC fail Major Red ACF
Rectifier fail Minor Yellow None
Multiple rectifier fail Major Red None
Rectifier ID conflict Major Red None
Rectifier manual off alarm Minor Yellow None
Rectifier AC phase alarm Minor Yellow None
Converter fail Minor Yellow None
Multiple converter fail Major Red None
Converter ID conflict Minor Yellow None
Converter distribution alarm Major Red MJF
Converter fan fail minor Minor Yellow None
Converter fan fail major Major Red None
Fuse alarm major Major Red MJF
Auxiliary input major Major Red None
Load Share imbalance Minor Yellow None
Contactor 1 open Major Red None
Contactor 1 failed Major Red None
Contactor 2 open Major Red None
Contactor 2 failed Major Red None
High battery temperature Major Red None
Temperature probe failure Minor Yellow None
Maintenance open alarm Major Red None