Peak Values Of The Instantaneous Values For Voltage - Siemens Simatic ET 200SP Manual

The following table shows the parameter assignment for the example:
Table 14- 11 Parameter assignment
Parameter
Power quality analysis functions
Number of cycles for analysis
Diagnostics power quality
Determination of voltage swell and dip
Nominal voltage
Voltage dip limit
If the module detects that the "Voltage dip limit" has been undershot:
● The module reports the diagnostics "Power quality" from "Number of cycles for analysis"
as long as there is a voltage dip.
● The module sets the qualifier bit 5 from "Number of cycles for analysis" as long as there
is a voltage dip.
● After the module has reset the diagnostics "Power quality" and reset the qualifier bit
again, bit 0 is set.
As long as bit 0 is set, the module returns the minimum value and the duration of the voltage
dip, e.g. in data record 160.
You reset Bit 0 with the bit "Reset status "power quality"".
14.4.1.4

Peak values of the instantaneous values for voltage

Introduction
The AI Energy Meter HF determines the maximum instantaneous value for the voltage for up
to three phases.
The function "Detect peak value voltage" returns the largest voltage value and the
associated phase. The module sets the qualifier bit 2 ("Power quality voltage peak") for the
phase in question. You can read the maximum voltage value, for example, in the data record
DS 160 (Page 259).
Voltage peak detection is based on the function for recording swells of the supply voltage in
accordance with IEC 61000-4-30. This function is used to record the maximum voltage value
in the supply network. In three-phase systems this function is only useful if the system is
symmetrical and when all phases show the same voltage transformers.
Accordingly, measurement always records only the peak value over all phases. In addition to
the requirements of IEC 61000-4-30, the phase on which the peak value voltage occurred is
detected.
For metrological reasons, only the phase concerned that shows this maximum value can be
returned. This may mean that the maximum voltage values of the other phases remain "0".
With a "reset power quality analysis" the analysis starts afresh and the current results are
discarded.
Analog input module AI Energy Meter 480VAC/CT HF (6ES7134-6PA00-0CU0)
Manual, 07/2018, A5E42674880-AA
Enable
4
Enable
Enable
230 V
50%
Interrupts/diagnostic alarms
14.4 Diagnostics response
121