GE Industrial Solutions Galaxy Vector Controller GCM3 - Manual (Page 43)

Galaxy Vector Controller GCM2, GCM3
Issue 4 January 2008 Operation 3 - 9
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 BLJ3 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.
System
Features
Load and Battery Contactor Features and Alarms
The Vector has two distinct circuits for controlling the state of
external Load and Battery Disconnect Contactors. Terminals
LVD1 and LVD2 on the BLJ3 board, or J23 and J4 on the
BTJ2/BTJ3 board provide the interface from the controller to
separate contactor driver circuits which must be furnished as
part of the plant circuitry.
Each contactor can be configured as none, load, or battery.
When configured as a battery contactor:
• The contactor is open when the plant voltage is less than the
respective low voltage battery disconnect threshold.
• The contactor is closed when the plant voltage is greater
than the respective low voltage battery reconnect threshold.
At power up, the contactor is closed and there is an 18
second delay before the controller determines the correct
state of the contactor.
When configured as a load contactor:
• The contactor is open when the plant voltage is less than the
respective low voltage load disconnect threshold.
• The contactor is closed when the plant voltage is greater
than the respective low voltage load reconnect threshold.