© 2008 Siemens Energy & Automation, Inc. All Rights Reserved.
PMCM-9340D-0208 ACCESS 9340 and 9360 Meters
2/2008 Chapter 10—Disturbance Monitoring (ACCESS 9360)
EN–109
With the information obtained from the ACCESS 9360 during a
disturbance, you can solve disturbance-related problems, including
the following:
• Obtain accurate measurement from your power system
— Identify the number of sags, swells, or interruptions for
evaluation
— Accurately distinguish between sags and interruptions, with
accurate recording of the time and date of the occurrence
— Provide accurate data in equipment specification (ride-
through, etc.)
• Determine equipment sensitivity
— Compare equipment sensitivity of different brands (contactor
dropout, drive sensitivity, etc.)
— Diagnose mysterious events such as equipment malfunctions,
contactor dropout, computer glitches, etc.
— Compare actual sensitivity of equipment to published
standards
— Use waveform capture to determine exact disturbance
characteristics to compare with equipment sensitivity
— Justify purchase of power conditioning equipment
— Distinguish between equipment malfunctions and power
system related problems
Figure 10–2: Waveform showing voltage sag caused by a remote fault
and lasted five cycles
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