Allen-Bradley 1407-CGCM, User Manual, Page: 81 / 252

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
CGCM Unit Configuration #HAPTER
•
Loss of Excitation Current Setpoint - Establishes the level of excitation
current that is considered to be a minimum needed to maintain generator
synchronization when in parallel with other power sources such as a utility
grid. This setpoint is stored in tag
LossExc_I_Setpt in the configuration
table and scaled in amperes. Excitation current in excess of the loss of
excitation current setpoint enables loss of sensing protection.
•
Loss of Excitation Current Delay - Establishes the amount of time in
seconds that the excitation current must be continually below the Loss of
Excitation Current Setpoint before the CGCM unit annunciates a loss of
excitation fault. This setpoint is stored in tag
LossExc_I_TimeDly in the
configuration table
•
Rotating Diode Fault Main Pole - Indicates the number of poles of the
main field of the generator. Stored in tag
MainPole in the configuration
table.
•
Rotating Diode Fault Exciter Pole – Indicates the number of poles of the
exciter field of the generator. Stored in tag
ExciterPole in the
configuration table.
•
Rotating Diode Fault Open Diode Level - Establishes the percent ripple at
which the rotating diode monitor alarm turns on when an open diode
condition occurs. This parameter is stored in tag
OpenDiodeMonitorLevel in the configuration table and is expressed in
percent of maximum ripple current.
•
Rotating Diode Fault Shorted Diode Level - Establishes the percent ripple
at which the rotating diode monitor alarm turns on in the event a shorted
diode condition occurs. Tag
ShortedDiodeMonitorLevel in the
configuration table stores this value, expressed in percent of maximum
ripple current.