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Chapter 2
Installation
32
Figure 17 - Current Connections for 3-phase Delta Generator with Two CTs
The connections that are shown in this diagram can be used if only two CTs are
available in the generator circuit. Two CTs can be used only with a three-wire
delta generator. The circuit that is shown in this diagram can be substituted for
the CT connections that are shown in Figures 9, 11, 14, and 16.
B
A
C
G
Auxiliary Input
The auxiliary input is a +/- 10V DC input. The auxiliary input terminals are on
TB7 and are labeled VREF(+) and VREF(-). SHLD3 is provided for landing the
cable shield. Twisted, shielded cabling is required for the VREF connections.
Remote Excitation Enable Input
The remote excitation enable input is a 24V DC input. The remote excitation
enable input terminals are on TB7 and are labeled EX-D(+) and EX-D(-).
Discrete Outputs
There are two types of discrete outputs: Fault relay outputs and redundancy relay
outputs.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
Customer Supplied CT
Shorting Switch or Test
Block
I3 (+) 1 A
I3 (+) 5 A
I3 ( -)
I2 (+) 1 A
I2 (+) 5 A
I2 ( -)
I1 (+) 1 A
I1 (+) 5 A
I1 ( -)
TB 3
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