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Simulate AC Gen and Bus Inputs and Verify Metered Parameters
Follow these steps to simulate the AC Gen and Bus inputs and verify the metered
parameters.
1. Disconnect Generator VT and CT inputs, and Bus VT inputs, in a
manner that lets you verify as much of the system wiring as practical.
Ideally, disconnect at the VTs for voltage inputs and at the CT shorting
blocks for the CT inputs (after suitably shorting the CTs).
2. Apply known signals to each of the VT and CT inputs by using the test
current and voltage source.
Apply the signals one at a time or simultaneously depending upon the
source available.
3. Observe the scheduled and unscheduled data that is returned to the
controller from the unit with the Logix Designer application.
4. Verify that the metered values correctly reflect the simulated signal inputs.
If errors are found, make the necessary wiring or configuration corrections.
Static Tests of Protective Functions
These tests can be performed to verify the applicable protective functions of the
CGCM-DLR unit. These tests can require the use of the test current and voltage
source. Some tests can require a load on the exciter output. This load can be either
the generator exciter field or a simulated load.
Loss of Excitation Current (40)
Follow these steps to test that the Loss of Excitation current function is working
properly.
1. Connect a suitable load to the excitation output terminals of the
CGCM-DLR unit.
2. Set the loss of field current setpoint to a level that causes an alarm.
3. Enable excitation in FCR mode with an FCR setpoint less than the loss of
field current setpoint.
4. Verify that a field loss alarm is annunciated following the expected delay by
viewing the appropriate controller tag.
5. Reset the loss of field setpoint to the desired level.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
CGCM-DLR Unit Startup
Chapter 5
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