GE D90 Plus Instruction Manual page 161

Line distance protection system

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CHAPTER 6: COMMUNICATIONS

LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL

Figure 126: Interlocking busbar protection scheme via direct inputs and outputs

The following settings should be applied to implement this application. For IED 1, set the

inter-relay application for both channels as follows in the Settings > Communications >

Inter-Relay menu. If there are more than two IEDs in a ring configuration, then one device

(for example, IED 1) must have it's protocol encoding set as an internal clock and the

remaining devices have their protocol encoding set as external clock if no multiplexer is

Figure 127: Inter-relay communications settings for IED 1

For IEDs 2 through 4, set the inter-relay application for both channels as follows in the

Settings > Communications > Inter-Relay menu.

Figure 128: Inter-relay communications settings for IEDs 2 through 4

-series IED 1:

DIRECT INPUTS AND OUTPUTS