7SR18 Commissioning & Maintenance Guide
3.8 Undercurrent (37) ............................................................................................................................ 40
3.8.1
Element Blocking ............................................................................................................... 41
3.8.2
3.9 Thermal Overload (49) .................................................................................................................... 42
3.9.1
Element Blocking ............................................................................................................... 43
4.1 CB Fail (50BF) ................................................................................................................................ 44
4.1.1
Element Blocking ............................................................................................................... 45
4.3 Broken Conductor (46BC) ............................................................................................................... 47
4.3.1
Element Blocking ............................................................................................................... 48
4.4 Trip/Close Circuit Supervision (74T/CCS)........................................................................................ 49
5.1 Quick Logic ..................................................................................................................................... 51
6.1 Periodic Tests ................................................................................................................................. 52
6.2 Maintenance ................................................................................................................................... 52
6.3 Troubleshooting .............................................................................................................................. 53
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