Siemens Sicam P850 7KG85 Series - Recording of Measurands and Events

4 Measurands and Recording
4.1 Measuring and Recording System
35SICAM P850/P855, 7KG85xx, Device Manual
E50417-H1040-C482-A6, Edition 10.2018
4.1.2 Recording of Measurands and Events
4.1.2.1 Recorder Types
SICAM P850/P855 provides various recording options to monitor and analyze the power quality.
The respective measuring interval of the recording is time-stamped to enable a correct time evaluation.
Table 4-2 Recording Measured Values
Recording Measurands Storage interval/storage
method
Application
Measurement
recorder
Frequency 10 s
(fixed)
Long-time monitoring of the
power quality for example
according to EN50160
Mains voltage level
10 min
(30 s, 1 min, 10 min, 15 min,
30 min, 1 h, 2 h)
Unbalance of the
mains voltage
Harmonics of the
mains voltage
Additional data
(for example power
values, min/max
values etc.)
Flicker
(only SICAM P855)
Pst determined over 10 min;
Plt over 2 h (12 Pst values)
Monitoring of the power
quality according to
IEC 61000-4-15
Event recorder
(only
SICAM P855)
Voltage dips,
Voltage interruptions
Residual voltage V
rms
(1/2) and
time stamp (duration) Long-time monitoring of the
power quality according to
EN50160, classification of
voltage events, for example
ITIC curve
Voltages swells Maximum voltage amplitude
V
rms
(1/2) and time stamp
(duration)
Trend recorder
(only
SICAM P855)
V
rms
(1/2) For measured value changes
(in percent or absolute) and
cyclic (time interval)
Subsequent analysis of the
power quality with any grid
codes
Fault recorder Voltages,
Currents
Voltage/current variation
triggers,
acquisition of sampled values
Analyzing the causes of
power quality problems