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Power Quality
44
PEM735_D00084_02_M_XXEN/06.2020
The display shows:
6.3.3
Rapid voltage changes
Rapid voltage changes are rapid variations of the r.m.s. value between two consecutive
voltage values. These changes are characterised by a definable but unspecified dura-
tion.
Rapid voltage changes can be due to load variations or switching operations in the us-
er's system, or faults in the supply system.
If, in the case of rapid voltage changes, the conditions for voltage sags or swells are also
fulfilled, the occurring events are often regarded as voltage sags or swells rather than
rapid voltage changes.
Display text
Description
Note
Limit (%)
Permissible deviations from the
nominal voltage
U
n
(tolerance band)
Left column
: max. ±10 % per-
missible deviation for 95 % of
the measured values (narrow
limits)
Right column
: -15/+10 % for all
measured values (wide limits)
Partial result
Limits complied with?
Specifications com-
plied with
Specifications not com-
plied with
Tolerance (%)
Number [%] of measured values,
which must be within the tolerance
band during a measurement period
U1…3 Actual (%)
Number of measured values [%]
within the tolerance band during a
measurement period
U1…3 Measured
Range
Range of measured values for
U
L1…3
Absolute values in V
X
Summary of Contents for B93100735
Page 18: ...Device description 18 PEM735_D00084_02_M_XXEN 06 2020...
Page 34: ...Commissioning and operation 34 PEM735_D00084_02_M_XXEN 06 2020...
Page 66: ...Voltage 66 PEM735_D00084_02_M_XXEN 06 2020...
Page 68: ...Current 68 PEM735_D00084_02_M_XXEN 06 2020...
Page 72: ...Waveform 72 PEM735_D00084_02_M_XXEN 06 2020...
Page 76: ...Harmonics 76 PEM735_D00084_02_M_XXEN 06 2020...
Page 80: ...Metering 80 PEM735_D00084_02_M_XXEN 06 2020...
Page 84: ...System 84 PEM735_D00084_02_M_XXEN 06 2020...
Page 91: ...Settings 91 PEM735_D00084_02_M_XXEN 06 2020 Fig 15 6 Settings display Ethernet change settings...
Page 98: ...Settings 98 PEM735_D00084_02_M_XXEN 06 2020...
Page 112: ...Glossary and terms 112 PEM735_D00084_02_M_XXEN 06 2020...
Page 115: ......