Table of Contents
Advertisement
5.7 Inrush Mode
This mode is used to record the waveform of the current on 229,376 samples, at
256 samples per period (17.92s of recording for a 50Hz signal).
Recording is triggered automatically when the starting of a motor is detected. The
beginning of the motor starting search can be triggered in delayed mode (starting
date and time programmed by the user). The search can be stopped manually if
desired.
Once the recording has been done, the PowerPad
the current. The user can then move along the curve using a cursor and zoom in
on features of interest.
The following information is available:
•
Instantaneous value of the current at the time indicated by the cursor.
•
Maximum instantaneous value of the current (over the entire start).
•
RMS value of the half-period (or lobe) of the current on which the cursor
is placed.
•
Maximum half-period RMS value of the current (over the entire start).
•
Starting time and duration of the starting of the motor.
WARNING: The voltage must be present before the motor is switched ON in order
to have a stable and correct frequency synchronization.
5.7.1
Starting an Inrush Recording
1.
Select the Inrush icon
2.
Select the New Inrush line and press Enter.
50
(starting current)
from the recording display using the ► button.
INRUSH MODE
Open last Inrush
New Inrush
Figure 5-22
Jr. displays the waveform of
®
02/25/06 10:26
Power Quality Analyzer Model 8230
Advertisement
Table of Contents
