Overcurrent and earth fault relay setting calculation pdf

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The customer shall provide document/calculation sheet to show that the earth fault relay, separate sets of C.T.s can be used for overcurrent.5. Chalk out which type of documents are agreed to submit to. consultant/client. 6. Arrange the content/index sheet of the relays, need to settings' Calculation of phase fault overcurrent relay settings. 9.13. Directional phase fault overcurrent relays. 9.14. Ring mains. 9.15. Earth fault protection. Earth fault protection (50N) The pickup is set percentage of single phase fault current. It acts as a backup protection. (a) Minimum available settings are For the purpose of setting and coordination, only single line to ground faults are considered. Consider a radial system as shown in fig 17.1. For a fault near