GE Industrial Solutions Galaxy Vector Rack Mounted Controller J85501M-1 - Manual (Page 35)

Galaxy Rack-Mounted Vector Controller J85501M-1
Issue 2 January 2008 Operation 3 - 7
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
Temperature Probe Failure
See Figure 3-1. The Vector reports a High Battery Temperature
Alarm when the temperature rises above the configured set
point. See Section 4, “Installation, Configuration and
Operation,” for information on battery thermal compensation
settings. It reports a Thermal Probe Alarm when thermal
compensation is enabled and a temperature probe is
disconnected or returns a grossly inaccurate reading to the
Thermal Compensation circuit.
Open Maintenance Alarm
Input Number 4 (MAINT) of the BUJ1 terminal connection
board should be connected to battery voltage during normal
operating conditions. This connection may be looped through
one or more circuit packs so that if the connection path is
interrupted, the Open Maintenance Alarm is activated.