GE Industrial Solutions Galaxy Vector Controller GCM3 User Manual
Page 46
Figure 3-2: Battery Thermal Compensation Set Points (Flexent)
0
– 0.17
65
75
53
25
– 5
Temperature
Compensation
Voltage Adjustment
(volts per cell)
Cell Temperature (°C)
Default Settings
A - Battery Low Temperature Voltage
Increase Threshold (-5 to +20 °C)
G -High Battery Temperature
Alarm Threshold (30 to 85 °C)1
H - High Battery Temperature
Step Down At (45 to 85 °C)2
F - High Battery Temperature Voltage
Decrease Upper Threshold Limit (30 to 55 °C)
D - Battery Temperature At Which There
Is No Voltage Compansation (15 to 30 °C)
B - Battery Low Temperature Compensation
Voltage Increase (Enable/Disable)
C - Battery Low Temperature Voltage
Increase (1mV to 5mV / Cell / °C)
E - High Battery Temperature Decrease
Voltage Rate (1mV to 5mV / Cell / °C)
C
(D – A)
•
E
(F – D)
•
B - Low Temperature Voltage
Compensation Disabled
1. The Battery High Temperature Alarm occurs when the temperature rises above the High Battery
Temperature Alarm Threshold ( ) set point. It retires when the temperature decreases to 10 °C below
this set point set point (65 °C default).
2. Plant voltage decreases 0.17 volts per cell when the temperature increases above the High Temperature
Voltage Step Down At ( ) set point. It is increased 0.17 volts per cell when the temperature decreases to
10 °C below this set point, as indicated by the dashed line (65 °C default).
G
H
Galaxy Vector Controller GCM2, GCM3
3 - 12 Operation
Issue 4 January 2008
Note: Any time that Battery Thermal Compensation is actively
changing the plant voltage above or below that set by the FSP
parameter during configuration, the LCD indicates the mode by
displaying the message “Float - Compensated”. This is not an
alarm condition, only an indication to the user that plant voltage
is different than that set by the FSP parameter.
Rectifier Sequencing
Rectifier Sequencing is a feature which allows the Vector to
bring the plant rectifiers back on line one at a time following an
ac power interruption. This serves to minimize their impact on