Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 79)

Rockwell Automation Publication 1407-UM001G-EN-P - April 2013 79
CGCM Unit Configuration Chapter 4
• Cross Current CT Secondary Current - The secondary current rating of
the cross current generator current transformer connected to the CGCM
unit terminals ID (+) and ID (-).This parameter is stored in tag
CCCT_Sec_I
in the configuration table. It is used for monitoring
generator reactive current in paralleling applications.
Excitation Tab
The Excitation tab is used to configure the unit’s settings related to operation and
protection of the exciter.
• Soft Start Initial Voltage - The generator voltage setpoint that is applied
immediately after enabling the CGCM unit excitation output. This
parameter is stored in tag SoftStart_InitLevel in the Configuration table.
Its value is a percentage of the nominal generator rated voltage. Take care
to set this parameter higher than the generator residual voltage.
EXAMPLE
As an example, consider a generator rated at 12,470V and 450 A. VTs
with ratios of 100:1 and CTs with ratios of 500:5 are used. The
appropriate settings for this configuration are:
• Generator VT Primary Voltage = 12,000
• Generator VT Secondary Voltage = 120
• Generator CT Primary Current = 500
• Generator CT Secondary Current = 5