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: |
Technical information |
Keywords/Labels: |
Premium Monitoring System, Ground Current, Shaft Voltage, |
Summary: |
The following article contains information and a table regarding monitoring the Premium Monitoring System for any significant changes in scan rate or attenuation ratio that may require maintenance. |
Monitored Line |
Scan Rate in Monitoring Mode |
Scan Rate for 6-Hour Snapshots |
Attenuation Ratio |
|---|---|---|---|
Ground current |
1 MS/second |
20 MS/second |
50 A : 10 V |
Shaft voltage |
1 MS/second |
20 MS/second |
100 V : 10 V |
|
Exciter shaft voltage (EZDP-2038) |
50 MS/second |
100 V : 10 V |
|
Shaft metering rope wear indicator |
100 kS/second |
100 kS/second |
100 V : 10 V |
Ground rope wear indicator |
100 kS/second |
100 kS/second |
100 V : 10 V |
|
Exciter shaft metering rope wear indicator (EZDP-2038) |
100 kS/second |
100 V : 10 V |
When live, hourly, and daily values trend outside the norm of the longer-term averages. This indicates that changes are taking place in the generator’s operation. Changes in trending values may be an indicator to manually record and download a new set of waveform snapshots for comparison against past waveforms collected. The information and ratios revealed in these waveforms can potentially assist in identifying the root cause of the change and can be used by trained individuals to identify potentially significant changes taking place in the generator’s bearings, windings, insulation, or other key components.
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