Process Bus Modules - GE D60 Instruction Manual

CHAPTER 3: INSTALLATION
CT connections for both ABC and ACB phase rotations are identical, as shown in the Typical Wiring Diagram.
The exact placement of a zero-sequence core balance CT to detect ground fault current is shown as follows. Twisted-pair
cabling on the zero-sequence CT is recommended.
The phase voltage channels are used for most metering and protection purposes. The auxiliary voltage channel is used as
input for the synchrocheck and volts-per-hertz features, which are optional features available for some UR models.
Substitute the tilde "~" symbol with the slot position of the module in the following figure.

3.3.5 Process bus modules

The D60 can be ordered with a process bus interface module. The module interfaces with the HardFiber Process Bus
System, or HardFiber Brick, allowing bidirectional IEC 61850 fiber optic communications with up to eight HardFiber Bricks.
The HardFiber system integrates seamlessly with the existing UR-series applications, including protection functions,
FlexLogic, metering, and communications.
This process bus system offers the following benefits:
• Reduces labor associated with design, installation, and testing of protection and control applications using the UR by
reducing the number of individual copper terminations
D60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 3-11: Zero-sequence core balance CT installation
Figure 3-12: CT/VTmodule wiring
WIRING
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