5-256 D30 Line Distance Protection System GE Multilin5.8 INPUTS AND OUTPUTS 5 SETTINGS5DIRECT 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 5–129: SIGNAL FLOW FOR DIRECT INPUT AND OUTPUT – EXAMPLE 3In three-terminal applications, both the remote terminals must grant permission to trip. Therefore, at each terminal, directinputs 5 and 6 should be ANDed in FlexLogic and the resulting operand configured as the permission to trip (HYB POTT RX1setting).5.8.11 TELEPROTECTION INPUTS AND OUTPUTSa) OVERVIEWThe relay provides sixteen teleprotection inputs on communications channel 1 (numbered 1-1 through 1-16) and sixteenteleprotection 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 assigningFlexLogic 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 pilotschemes and direct transfer tripping. It should be noted that failures of communications channels will affect teleprotectionfunctionality. The teleprotection function must be enabled to utilize the inputs.b) TELEPROTECTION INPUTSPATH: SETTINGS INPUTS/OUTPUTS TELEPROTECTION TELEPROT INPUTS TELEPROT INPUTSTELEPROT INPUT 1-1DEFAULT: OffRange: Off, On, Latest/Off, Latest/OnMESSAGE TELEPROT INPUT 1-2DEFAULT: OffRange: Off, On, Latest/Off, Latest/On↓MESSAGE TELEPROT INPUT 1-16DEFAULT: OffRange: Off, On, Latest/Off, Latest/OnMESSAGE TELEPROT INPUT 2-1DEFAULT: OffRange: Off, On, Latest/Off, Latest/OnMESSAGE TELEPROT INPUT 2-2DEFAULT: OffRange: Off, On, Latest/Off, Latest/On↓MESSAGE TELEPROT INPUT 2-16DEFAULT: OffRange: Off, On, Latest/Off, Latest/On842717A1.CDRUR IED 3UR IED 2UR IED 1DIRECT OUT 2 = HYB POTT TX1DIRECT INPUT 5DIRECT INPUT 6DIRECT OUT 2 = HYB POTT TX1DIRECT INPUT 5DIRECT INPUT 6DIRECT OUT 2 = HYB POTT TX1DIRECT INPUT 6DIRECT OUT 4 = DIRECT INPUT 6DIRECT OUT 3 = DIRECT INPUT 5DIRECT INPUT 5
