Question: For the system shown below. Find a proper coordination for the relays from R1 to R4. You can use TDS (American system) or TMS(British System).

For the system shown below. Find a proper coordination for the relays from R1 to R4. You can use TDS (American system) or TMS(British System). (hint: note the difference in load current) LR h 50A 100A 50A 500A Fig 16.1 Radial system for Primary and Back up Overcurrent Protection The maximum and minimum fault current seen by each relay are below Table 1 : Data for Phase Relay Setting and Coordination Bus Maximum Load Minimum Fault Current Maximum Fault Current bus A 5 0 250 500 bus B 50 6 50 1200 bus C 100 1100 2000 | bus DL 50 1600 3500 For the system shown below. Find a proper coordination for the relays from R1 to R4. You can use TDS (American system) or TMS(British System). (hint: note the difference in load current) LR h 50A 100A 50A 500A Fig 16.1 Radial system for Primary and Back up Overcurrent Protection The maximum and minimum fault current seen by each relay are below Table 1 : Data for Phase Relay Setting and Coordination Bus Maximum Load Minimum Fault Current Maximum Fault Current bus A 5 0 250 500 bus B 50 6 50 1200 bus C 100 1100 2000 | bus DL 50 1600 3500
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