5-42 F60 Feeder Management Relay GE Multilin5.2 PRODUCT SETUP 5 SETTINGS5Figure 5–11: SINGLE-CHANNEL OPEN LOOP CONFIGURATIONIn the above application, the following settings should be applied:UR IED 1: DIRECT OUTPUT DEVICE ID: “1” UR IED 2: DIRECT OUTPUT DEVICE ID: “2”DIRECT I/O RING CONFIGURATION: “Yes” DIRECT I/O RING CONFIGURATION: “Yes”UR IED 3: DIRECT OUTPUT DEVICE ID: "3"DIRECT I/O RING CONFIGURATION: "Yes"In this configuration the following delivery times are expected (at 128 kbps):IED 1 to IED 2: 0.2 of power system cycle; IED 1 to IED 3: 0.5 of power system cycle;IED 2 to IED 3: 0.2 of power system cycleIn the above scheme, IEDs 1 and 3 do not communicate directly. IED 2 must be configured to forward the messages asexplained in the Inputs/Outputs section. A blocking pilot-aided scheme should be implemented with more security and, ide-ally, faster message delivery time. This could be accomplished using a dual-ring configuration as shown below.Figure 5–12: DUAL-CHANNEL CLOSED LOOP (DUAL-RING) CONFIGURATIONIn the above application, the following settings should be applied:UR IED 1: DIRECT OUTPUT DEVICE ID: “1” UR IED 2: DIRECT OUTPUT DEVICE ID: “2”DIRECT I/O RING CONFIGURATION: “Yes” DIRECT I/O RING CONFIGURATION: “Yes”UR IED 3: DIRECT OUTPUT DEVICE ID: "3"DIRECT I/O RING CONFIGURATION: "Yes"In this configuration the following delivery times are expected (at 128 kbps) if both the rings are healthy:IED 1 to IED 2: 0.2 of power system cycle; IED 1 to IED 3: 0.2 of power system cycle;IED 2 to IED 3: 0.2 of power system cycleThe two communications configurations could be applied to both permissive and blocking schemes. Speed, reliability andcost should be taken into account when selecting the required architecture.842714A1.CDRUR IED 1TX1RX1UR IED 2RX2TX2RX1TX1UR IED 3RX1TX1842715A1.CDRUR IED 1TX1RX2TX2RX1UR IED 2RX2TX1RX1TX2UR IED 3RX1TX2TX1RX2
