Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
35
Installation
Chapter
2
Real-power Load Sharing
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.
Figure 23 - Real-power Load Sharing
Cross-current Compensation
The
Cross-current (Reactive Differential) Compensation Connection Diagram
shows a typical connection diagram for three paralleled generators
that use the 5 A sensing input range on the AC current input.
Make connections with 2.6 mm
2
(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
Ω
(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-DLR unit in the loop.
The cross-current compensation terminals are on TB3 and are labeled ID(-) and
ID(+). One and 5 ampere range terminals are provided.
TB7
LS (+)
LS (-)
SHLD 4
TB 7
LS (+)
LS (-)
SHLD 4
TB 7
LS (+)
LS (-)
SHL D 4
CGCM 1
CGCM2
CGCM3
Ground shield at
only one point.
(1) Series C devices have internal 1
Ω
resistor. Earlier devices can require an external resistor.