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SICAM Q80 7KG8080
Power Quality Recorder SICAM Q80 7KG8080, System manual
E50417-H1076-C420-A2, Release 12.01.2015
The numbered items in the figure above are explained as follows:
Nr
Trigger
Description
1
Voltage
Trigger settings for the voltage inputs. The grid frequency is defined at the
. Find an explanation for the hysteresis
.
If yourSICAM Q80 7KG8080 comes with a second voltage measurement system, a
selection for the voltages U1..U4 and U5...U8 appears here. By this means it is
possible to to set parameters 1 through 9, as described here, for each voltage
system separately.
2
Limits in %
Selection of the specified cutoff limit
Absolute values (not activated)
% of operating voltage (activated)
With the cutoff limit specified in % of the operating voltage, these settings can be
applied to any voltage system, since they are independent of the absolute operating
voltage.
3
Curve comparison
trigger for the voltage
This setting is only visible if it has not been disabled using
nicht gesperrt wurde.
The discrepancy between instantaneous values at the same position in two periods
must not exceed the specified value. Select either monitoring of the Phase-Neutral
(PN) voltage or Phase - Phase (PP) voltage.
Be certain to observe the notes on the data volume,
.
4
Threshold value trigger
for the voltage
The signal's RMS-value may not sink below the lower threshold in a negative slope,
and may not pass the upper threshold in a positive slope (range trigger).
In 4-wire configuration, the Phase-Neutral and Phase-Phase voltages can be
monitored in parallel:
Phase-to-Neutral (RMS)
Phase-to-Phase (RMS)
5
Transient monitoring
Voltage peaks having durations > 20µs and an amplitude of more than 150% of the
line voltage are detected. In a Y- (star-) configuration, the voltage measurement is
Phase - Neutral (PN); for delta configuration, Phase - Phase (PP), see picture below.
Fault recording is always at 50 kHz. This also applies to the curve comparison and
threshold value triggers.
Attention: The memory demands are increased! for 4U/4I and 1s recording duration,
the data volume amounts to approx. 1 MByte per fault!
6
Signal frequency
The amplitude of the modulated signal may not exceed the specified threshold. Each
checkbox activates signal capture for one of the three conductors. (PN for Y- or PP
for delta configuration). The frequencies to be monitored are set under
.
7
Curve comparison
trigger for the current
The discrepancy between instantaneous values at the same position in two periods
must not exceed the specified value.
Be certain to observe the notes on the data volume,
.
8
Threshold trigger for the
current
The boundaries can be stated either in % of the measurement range or in absolute
terms of A. In contrast to the case of the voltage, the deviation is NOT entered here!
When 0 is entered, this boundary is ignored, which provides a way to activate only
one of the two boundaries.
The signal's RMS-value may not sink below the lower threshold in a negative slope,
and may not pass the upper threshold in a positive slope (range trigger).
9
Frequency trigger
Resolution of a trigger if the network frequency found either exceeds or falls below
the respective limits.
10
Pretrigger
Recording duration preceding the event
11
Data capture duration
following the trigger event
min minimum recording duration
max maximum contiguous recording duration
block Blocking time after event detection. During this time, there is no new
trigger release.
Example 1: Setting of a fixed recording duration of one second
min = max = block = 1s
Example 2: Variable recording duration
Upon detection of an event, there is to be at least 0.5 seconds of data recording.
Multiple releases from one event are to be prevented by means of a blocking time
of 0.3 seconds (e.g. chatter of the digital input). The recording is to be extended
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