Related Products: |
EGMA-004, EGMA-005, EGMA-006, EGMA-007, EGMA-008, EGMA-013, EGMA-015, EGMA-016, EGMA-019 |
Related Documents: |
EZDP-2020 and EZDP-2038 |
Type: |
Troubleshooting |
Keywords/Labels: |
Premium Monitoring System, Troubleshooting, Rope Faults |
Summary: |
This article contains considerations to investigate a possible fault indication involving the grounding current stepping down. |
If you notice an unusual step down in grounding current, it may be a significant event. Has something else contacted the shaft, or has a bearing lost insulation allowing alternate paths to ground? Is the rope-to-shaft contact of good integrity to allow current to flow freely when voltage is present? When grounding current is markedly different from what is normally seen on the generator and there is no correlating operating condition to explain it, the grounding system should be investigated to assure that grounding is still taking place properly. Here again, it is good to be familiar with what values are normal for your generator when it is online, on turning gear, offline, and at varying load levels.
Average or Peak-to-Peak Shaft Voltages or Grounding Currents Step Up
Grounding Current Steps Down and Shaft Voltage Steps Up
Average or Peak-to-Peak Shaft Voltages or Currents Trending Up or Down Over Time
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