GE Industrial Solutions Galaxy Vector Controller GCM3 - Manual (Page 42)

Galaxy Vector Controller GCM2, GCM3
3 - 8 Operation Issue 4 January 2008
The operation of an output distribution fuse or circuit breaker
places battery voltage onto the FAJ input of the BLJ3 or
BTJ2/BTJ3 board, activating the Major Fuse alarm.
Auxiliary Major on the BLJ3 board can be user-assigned for any
supplemental alarm monitoring for which a battery voltage
signal (through 1K ohms) can be obtained, which is asserted by
a signal to the AMJ terminal on the BLJ3 board. Auxiliary Major
on the BTJ2/BTJ3 board is usually reserved for an open battery
fuse alarm or for a major alarm generated by the environmental
controller for the cabinet, and is generated by a closure between
the two pins of J27 of the BTJ2/BTJ3.
Auxiliary Minor is only available on the BLJ3 board and can be
user-assigned for any supplemental alarm monitoring for which
a battery voltage signal (through 1K ohms) can be obtained,
which is asserted by a signal to the AMN terminal on the BLJ3
board.
Load Share Imbalance Alarm
This alarm is generated when the current share function is
enabled and the rectifiers do not share the current equally or
within the current share boundaries. The controller monitors the
current (I
rect
) delivered by each of the rectifiers and determines
the total current delivered by the plant as the sum of all rectifier
currents. The average rectifier current (I
avg
) is calculated by
dividing the total current by the number of active rectifiers in the
plant. If, for any rectifier, actual rectifier current I
rect
is different
from the average rectifier current I
avg
by 10A or more for 5
minutes, then the controller issues a Rectifier Current Imbalance
Alarm. This alarm retires when the difference between the I
rect
and I
avg
drops below 10A.
Contactor 1 Open, Contactor 2 Open, Contactor 1 Failure,
Contactor 2 Failure Alarm
A Contactor Open alarm is reported whenever the Vector senses
that a contactor is open. This alarm is processed as a PMJ.
A Contactor Fail alarm is reported whenever the Vector senses
that a contactor that should be open or closed is in the opposite
state (closed or open). This alarm is also processed as a PMJ.
High Battery Temperature Alarms