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5.2. INRUSH CURRENT MODE
The
Inrush Current sub-mode lets you capture (record) inrush currents (voltage and current waveforms, network frequency,
half-cycle RMS voltages and currents except for the neutral), view, and delete the recordings.
When you open Inrush Current mode:
■
If no capture has been made, the Capture Schedule screen (Figure 5-6) is displayed.
■
If a capture has been made, then the Capture Parameters screen (Figure 5-7) is displayed.
5.2.1. CONFIGURING THE CAPTURE
Sub-mode indicator.
Capture parameters (see §5.2.2).
Rapid configuration and starting of
Shortcut to the Configuration
menu to set triggering thresholds
Press the
button to start recording immediately with a current threshold of 0 A and a hysteresis of 100%.
NOTE: The rapid starting of an inrush current modifies the configuration of the current threshold.
To configure a capture, enter the triggering filter (3A, A1, A2, or A3), the start date and time, and the recording mode (RMS +
PEAK
or RMS only).
■
RMS + PEAK recording mode produces a trend recording of the half-period RMS values and a trend recording of the
samples (envelopes and waveforms). The maximum duration of the recording depends on the frequency network and
is on average about one minute.
■
In RMS only recording mode, recording of samples is eliminated in favor of a longer maximum capture duration.
This mode records only the half-period RMS values and its maximum duration is about ten minutes.
To modify an item, move the yellow cursor to it using the and buttons, then validate with the button. Change the value
using the , , and buttons, then validate again.
NOTE: You cannot configure an alarm campaign if an inrush current capture is in progress.
After configuration, start the capture by pressing the
The
button replaces the
NOTE: To achieve a valid measurement, the voltage must be present and stable before starting an InRush current
measurement.
The message "capture pending" is displayed until the start time is reached and the triggering conditions are satisfied. It is then
replaced by the message "capture in progress." The memory status indicator appears at the top of the screen. This indicator
disappears when the capture is completed.
If the capture is completed with a stop event or if instrument recording memory is full, the capture stops automatically.
NOTE: The instrument can store only a single inrush current capture in memory. To make another capture, delete the
previous one.
To return to the Waveform capture screen, press
a capture.
(§4.8).
button and can be used to stop the capture before it is finished.
.
Figure 5-6
button. The
status bar icon blinks to indicate that the capture has started.
43
If the triggering filter appears in red, it is
not available due to an incompatibility
with the configuration (connection, type
of sensors, or current ratio).
Configure capture.
Start capture.
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