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Recommended Start-up
Procedure
Test Current and Voltage Source
An appropriately calibrated 3-phase voltage and 3-phase current source is
recommended to simulate generator and system power conditions at known
operating points of interest. These sources can be connected to the VT and CT
input terminals in place of system VT and CT instruments.
WARNING: Never open a current transformer (CT) secondary circuit with
primary current applied. Wiring between the CTs and the CGCM-DLR unit
must include a shorting terminal block in the CT secondary circuit.
Shorting the secondary with primary current present lets you remove
other connections if needed. An open CT secondary with primary current
applied produces a hazardous voltage, which can lead to personal injury,
death, property damage, or economic loss.
Perform the following static and dynamic redundancy tests.
Perform recommended start-up procedures on each unit when commissioning
redundant CGCM-DLR systems. Remove control power from the other unit
before start-up procedures.
Initial Checkout
Follow these steps to perform the initial checkout.
1. Inspect physical installation of the unit and associated hardware.
2. Inspect all related wiring interconnections.
3. Verify that grounding wiring is correctly installed and that CT wiring has
been correctly installed by using shorting terminal blocks or test switches
you provided.
4. Verify that all safety-related measures have been properly taken; such as
locking and tagging out power interconnections and prime mover
capability.
Apply Power to the CGCM-DLR Unit (24V DC)
Follow these steps to apply power to the unit.
1. Apply control power (24V DC) to the unit.
2. Verify that following the CGCM-DLR unit initial power self-test, the
Power status indicator illuminates and both EtherNet/IP port link status
indicators flash and then become solid green.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
CGCM-DLR Unit Startup
Chapter 5
121
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