Transient Detection, Metering And Capture - Allen-Bradley Powermonitor 3000 User Manual

8-18 Advanced Features
Transient Detection,
Metering and Capture
Publication 1404-UM001D-EN-E - October 2004
• Peak demand current: expressed in VARs. Range 0.0 to
21
999.9*10
• Average demand current: expressed in VARs. Range 0.0 to
21
999.9*10
• Load factor current: expressed in per cent. Range 0.0 to 100.0
• Elapsed time: hours that have elapsed since the last automatic or
manual clear/reset operation
• Ending date: for this load factor record. Range 0 to 123199
(mmddyy). 0 if the selected record is blank
Transient detection functionality, available only in the M8 model,
continuously monitors your choice of voltage or current inputs for the
occurrence of a transient. Transients such as voltage spikes and
momentary dropouts can disrupt equipment connected to the power
source, but can be difficult to detect. Use communications to
configure transient capture parameters and retrieve the data for
display and/or processing. The Display Module does not support an
interface for transient detection. Transient detection:
• Continuously monitors all 3 voltage or 3 current channels
• Identifies transients at least 200 microseconds in duration
• Triggers a transient oscillogram capture when it detects a
transient
• Records captures each containing 12 cycles; 6 cycles preceding
and 6 cycles following the transient
• Stores up to six transient captures of all 7 voltage and current
channels in non-volatile memory
• Calculates RMS voltage and current values for each cycle in each
capture
• Stores each data point in the capture with 13-bit plus sign
resolution
• Monitors for transients on your choice of voltage channels or
current channels
• Automatically or manually adjusts transient detection thresholds
You may configure a detected transient to trigger a setpoint, which
may then trigger an oscillogram capture, providing "zoom" capability.
All communications options support transient configuration, metering
and capture.
Use RSPower32 or RSEnergyMetrix software, or create a custom
application, to configure and read transient data. The following
information provides details of the data table interface for transient
detection.