Redundancy; Redundancy Inputs To Cgcm-Dlr Unit - Allen-Bradley 1407-CGCM-DLR User Manual

Appendix E Detailed CGCM-DLR Unit Tag Descriptions

Redundancy

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• ExcRipple – This tag reports the Ripple Current component of the
Excitation Current.
• kW_Hrs – This tag reports the cumulative kWHours produced by the
Generator.
• kVAR_Hrs – This tag reports the cumulative kVARHours produced by
the Generator.
• kVA_Hrs – This tag reports the cumulative kVAHours produced by the
Generator.
• GenFreq – This tag reports the Generator frequency.
• BusFreq – This tag reports the Bus frequency.
• V_AdjustOffset – This tag reports the voltage on the VREF terminals of
the CGCM-DLR unit.
• BusV_Present - This tag indicates if there is voltage present on the
reference bus.
• GenV_Present - This tag indicates if generator voltage is being developed.
• FreqLessThan10Hz - This tag indicates that the generator frequency is
less than 10 Hz.
This section describes the redundancy inputs and outputs for the CGCM-DLR
unit.

Redundancy Inputs to CGCM-DLR Unit

• RedndtTrackRate - This tag configures the rate at which the Tracking
mode of the redundant CGCM-DLR units matches the primary
CGCM-DLR unit active excitation control mode
• RedndtTrackDly - This tag changes the initial delay of the tracking
function of the redundant CGCM-DLR unit to prevent the Tracking
mode from adjusting the non-active modes into an undesirable condition.
For example, while the unit is operating in AVR mode, the sensing VT fails
to open. If the redundant CGCM-DLR unit Tracking mode is allowed to
track instantly the full-on condition that is created by the loss of sensing,
the transfer to the redundant CGCM-DLR unit in an undesirably high
generator voltage. The addition of a tracking delay enables the unit to
transfer to a redundant CGCM-DLR unit without letting the redundant
CGCM-DLR unit follow into a potentially undesirable operating point.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019