DECS-200 Installation 4-9
A single bus sensing voltage input connects from phase A to phase C. The bus voltage sensing input has
four automatically selected ranges which are identical to the generator sensing voltage ranges.
Generator and bus voltage sensing terminals are listed in Table 4-5.
Table 4-5. Generator and Bus Voltage Sensing Terminals
Terminal Description
A1 (E1) A-phase generator sensing voltage input
A2 (E2) B-phase generator sensing voltage input
A3 (E3) C-phase generator sensing voltage input
A4 (B1) A-phase bus sensing voltage input
A5 (B3) C-phase bus sensing voltage input
Generator Current Sensing
A single current sensing input connects to a CT monitoring generator current on phase B. Two terminals
are provided to accommodate 1 Aac or 5 Aac CTs.
An input is also provided for sensing the current in a cross-current (reactive differential) compensation
loop. Two or more paralleled generators can operate in cross-current compensation mode. Figure 4-7
illustrates a typical connection diagram for two paralleled generators using the 5 Aac sensing range on
the DECS-200 cross-current input. The 1 Ω resistor is a typical value that can be used to set the burden.
(Ensure that the resistor power rating is adequate for the installation.) Like the generator current sensing
input, the cross-current input has two terminals to accommodate 1 Aac or 5 Aac CTs.
Generator current sensing terminals are listed in Table 4-6.
Table 4-6. Generator Current Sensing Terminals
Terminal Description
B1
(CTB 1 AMP)
B-phase generator current input for 1 Aac sensing
B2
(CTB 5 AMP)
B-phase generator current input for 1 Aac sensing
B3
(CTB COM)
B-phase generator sensing current common terminal
B4
(CT CC 1A)
Cross-current input for 1 Aac sensing
B5
(CT CC 5A)
Cross-current input for 5 Aac sensing
B6
(CT CC COM)
Cross-current common terminal
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