Swell”: instantaneous voltage rise, Inrush current”: instantaneous current rise, Example of swell/ inrush current detection – KYORITSU 6315 Instruction Manual User Manual
Page 69
Threshold setting for Power quality (Event)
KEW6315
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KEW6315
“SWELL”: Instantaneous voltage rise
Set the threshold value (rms voltage in one cycle) for swell in percentage of the nominal voltage.
The following selection range varies depending on the selected VT ratio. The preset hysteresis has an
effect on this threshold value.
Selection
100 - 200% against the nominal voltage (110%)
* Default setting is highlighted in gray.
Move the blue highlight to “SWELL”.
Show the value entry window.*
Set the percentages against the nominal voltage.
“Inrush Current”: Instantaneous current rise
Set the threshold value (rms current in one cycle) for inrush current in percentage of the max value
of the Current range. The following selection range varies depending on the selected CT ratio. The preset
hysteresis has an effect on this threshold value.
Selection
0 - 110% against the nominal voltage (100%)
* Default setting is highlighted in gray.
Move the blue highlight to “InrushCurrent”.
Show the value entry window.*
Set the percentages against the nominal voltage.
Example of Swell/ Inrush current detection:
The details are described in “Displaying recorded events” (P. 116).
* A pop-up appears and show the effective range.
* A pop-up appears and show the effective range.
rms value(1)
rms value(2)
rms value(3) rms value(5) rms value(7) rms value(9)
rms value(4) rms value(6) rms value(8)
Measured
waveform
(5)
RMS waveform
(4)
(6)
(7)
(8)
(9)
(1)
(2)
(3)
Threshold
Hysteresis