Man. NVIP3 – Rel 1.3 EN (UK)
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5.2.10.1 - Transients Setup
This page allows the user to set the thresholds that the instrument will use to identify the transient event (i.e.
the instant swell or overcurrent of peak). The following parameters must be set:
•
Channels to be measured (Sect. 5.2.10.1.1).
•
The voltage peak threshold (Sect. 5.2.10.1.2).
•
The phase current peak threshold (Sect. 5.2.10.1.3).
•
The neutral current threshold - which obviously is not present if the
"Inputs" field is set to "Auxiliary" (Sect. 5.2.10.1.4).
•
The capturing mode (Sect. 5.2.10.1.5).
5.2.10.1.1 - Input Selection
The two options available are "Three-phase and neutral inputs" (3PH and N) or "Auxiliary input".
NOTE
: This field does not indicate the electrical connection; therefore, the channels will always be identified as
3PH and N, even if a single phase, two-phase or three-phase without neutral connection is being used.
5.2.10.1.2 - Voltage Threshold
This value indicates the
peak
voltage threshold over which the instrument will identify the presence of a
transient. Set "0" to disable this transient search function.
5.2.10.1.3 - Current Threshold
This value indicates the
peak
phase current threshold over which the instrument will identify the presence of a
transient. Set "0" to disable this transient search function.
5.2.10.1.4 - In Threshold
This value indicates the
peak
In current threshold over which the instrument will identify the presence of a
transient. Set "0" to disable this transient search function.
5.2.10.1.5 - Transient Detecting Mode
Transients can be detected in 4 different modes:
•
SINGLE TRIGGER
: only one transient (the first to occur) will be detected and displayed, but not
stored.
•
SINGLE TRIGGER + MEM
: same as single trigger, but the transient will also be stored on the uSD
card (Sect. 5.2.11)
•
AUTO TRIGGER
: the instrument will detect all transients and display the last one.
•
AUTO T MEM
: same as auto trigger, but all transients will also be stored on the uSD card
(Sect. 5.2.11)
NOTE
: do not set thresholds lower than the nominal peak value of the signal, as this will result in the
continuous recording of events.
After setting all the parameters, select START to start the transient search. Select "Exit" to return to the
Transient Menu (Sect. 5.2.10).
A waiting page will then appear. The instrument will stay in this state until a transient
actually occurs or the user presses
(Exit) to exit and return to the Transient Setup
page (Sect. 5.2.10).
