5-188 B30 Bus Differential System GE Multilin5.8 INPUTS AND OUTPUTS 5 SETTINGS5EXAMPLE 1: EXTENDING INPUT/OUTPUT CAPABILITIES OF A B30 RELAYConsider an application that requires additional quantities of contact inputs or output contacts or lines of programmablelogic that exceed the capabilities of a single UR-series chassis. The problem is solved by adding an extra UR-series IED,such as the C30, to satisfy the additional inputs/outputs and programmable logic requirements. The two IEDs are con-nected via single-channel digital communication cards as shown below.Figure 5–82: INPUT AND OUTPUT EXTENSION VIA DIRECT INPUTS AND OUTPUTSAssume contact input 1 from UR IED 2 is to be used by UR IED 1. The following settings should be applied (Direct Input 5and bit number 12 are used, as an example):The Cont Ip 1 On operand of UR IED 2 is now available in UR IED 1 as DIRECT INPUT 5 ON.EXAMPLE 2: INTERLOCKING BUSBAR PROTECTIONA simple interlocking busbar protection scheme can be accomplished by sending a blocking signal from downstreamdevices, say 2, 3 and 4, to the upstream device that monitors a single incomer of the busbar, as shown in the figure below.Figure 5–83: SAMPLE INTERLOCKING BUSBAR PROTECTION SCHEMEAssume that Phase Instantaneous Overcurrent 1 is used by Devices 2, 3, and 4 to block Device 1. If not blocked, Device 1would trip the bus upon detecting a fault and applying a short coordination time delay.The following settings should be applied (assume Bit 3 is used by all 3 devices to send the blocking signal and Direct Inputs7, 8, and 9 are used by the receiving device to monitor the three blocking signals):UR IED 2: DIRECT OUT 3 OPERAND: " PHASE IOC1 OP "UR IED 3: DIRECT OUT 3 OPERAND: " PHASE IOC1 OP "UR IED 4: DIRECT OUT 3 OPERAND: " PHASE IOC1 OP "UR IED 1: DIRECT INPUT 7 DEVICE ID: "2"DIRECT INPUT 7 BIT NUMBER: "3"DIRECT INPUT 7 DEFAULT STATE: select "On" for security, select "Off" for dependabilityDIRECT INPUT 8 DEVICE ID: "3"DIRECT INPUT 8 BIT NUMBER: "3"DIRECT INPUT 8 DEFAULT STATE: select "On" for security, select "Off" for dependabilityUR IED 1: DIRECT INPUT 5 DEVICE ID = “2”DIRECT INPUT 5 BIT NUMBER = “12”UR IED 2: DIRECT OUT 12 OPERAND = “Cont Ip 1 On”UR IED 1TX1RX1UR IED 2TX1RX1842711A1 CDR842712A1.CDRUR IED 1UR IED 2 UR IED 4UR IED 3BLOCK
