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GE Multilin D60 Line Distance Protection System 5-359

5 SETTINGS 5.8 INPUTS AND OUTPUTS

DIRECT OUT 2 OPERAND: "HYB POTT TX1"

DIRECT OUT 3 OPERAND: "DIRECT INPUT 5" (forward a message from 1 to 3)

DIRECT OUT 4 OPERAND: "DIRECT INPUT 6" (forward a message from 3 to 1)

Signal flow between the three IEDs is shown in the figure below:

Figure 5–179: SIGNAL FLOW FOR DIRECT INPUT AND OUTPUT – EXAMPLE 3

In three-terminal applications, both the remote terminals must grant permission to trip. Therefore, at each terminal, direct

inputs 5 and 6 should be ANDed in FlexLogic and the resulting operand configured as the permission to trip (HYB POTT RX1

setting).

5.8.11 TELEPROTECTION INPUTS AND OUTPUTS

a) OVERVIEW

The relay provides sixteen teleprotection inputs on communications channel 1 (numbered 1-1 through 1-16) and sixteen

teleprotection inputs on communications channel 2 (on two-terminals two-channel and three-terminal systems only, num-

bered 2-1 through 2-16). The remote relay connected to channels 1 and 2 of the local relay is programmed by assigning

FlexLogic operands to be sent via the selected communications channel. This allows the user to create distributed protec-

tion and control schemes via dedicated communications channels. Some examples are directional comparison pilot

schemes and direct transfer tripping. It should be noted that failures of communications channels will affect teleprotection

functionality. The teleprotection function must be enabled to utilize the inputs.

b) TELEPROTECTION INPUTS

PATH: SETTINGS  INPUTS/OUTPUTS  TELEPROTECTION  TELEPROT INPUTS

 TELEPROT INPUTS



TELEPROT INPUT 1-1

DEFAULT: Off