Difference Between Ct Connections Of Dgp And Dgpr - GE Multilin DGPR Instruction Manual

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CHAPTER 3: INSTALLATION

Difference between CT connections of DGP and DGPR

MULTILIN DGPR – INSTRUCTION MANUAL

Although the DGPR is a retrofit solution for the DGP and the attempt was made to maintain

as much similarity as possible, there are some differences. Figure 13 shows the difference

in the CT connections.

DGPR and DGP use residual connections. DGP uses a hard-wire approach to sum all of the

current in INS or INR, while the 51N element in the DGPR is connected in the common

neutral connection of the current transformer, which is the most common connection

arrangement. On four-wire circuits, the fourth current transformer is connected in the

neutral circuit, shown with a dotted line in the Figure 14.

Figure 13: Typical CT connections

WIRING

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