Allen-Bradley 1407-CGCM, User Manual, Page: 33 / 252

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
Installation #HAPTER
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The load sharing terminals connect to a 0…5V DC, internally powered circuit.
The load sharing terminals are on TB7 and are labeled LS(+) and LS(-). Terminal
SHLD4 is provided to land the cable shield. Twisted, shielded cabling is required
for the load sharing connections.
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#ROSSCURRENT#OMPENSATION
The Cross-current (reactive differential) Compensation Connection Diagram on
page 34 shows a typical connection diagram for three paralleled generators using
the 5 A sensing input range on the AC current input.
Make connections with 2.6 mm (10 AWG) copper wire for CT inputs.
The resistance of the cross-current CT wiring must be as low as possible. A loop
resistance less than 10% of the internal cross -current burden resistance of
1.0 7
(1)
enables cross-current operation with negligible voltage droop. If the
CCCT loop resistance must be higher, adjust the CCCT gain or increase the
cross-current burden resistance. You can do those things by adding external
resistance to each CGCM unit in the loop.
The cross-current compensation terminals are on TB3 and are labeled ID(-) and
ID(+). One and five ampere range terminals are provided.
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(1) Series C devices have internal 1
7
resistor. Earlier devices can require an external resistor.