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WIRING
CT inputs system side
16
The protection response to the residual current is
For those models that uses Core Balance (Zero Sequence) CT only in the DGP relay, where
the conductor cables pass through the center hole of the core balance CT (Figure 15), the
GE application team can verify customer requirements and modify the default
configuration of the DGPR. This type of connection is considered a custom order.
Figure 16 shows DGPR CT connections for the system side. BH1, BH3, and BH5 are for
current inputs, while BH2, BH4, and BH6 are for common return. BH7 and BH8 are used for
INS in the DGP, but they are not used in the DGPR.
Figure 16: DGPR CT connections system side (drawing GPRP000002)
Figure 14: DGP 50/51N element
In = 3I_0 = Ia + Ib + Ic
Figure 15: Custom configuration
MULTILIN DGPR – INSTRUCTION MANUAL
CHAPTER 3: INSTALLATION
Eq. 1
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