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Ceiec Electric Technology
manual trigger command has a higher priority. When Waveform Recorder is already in progress,
other Waveform Recorder commands will be ignored until the current recording has completed. The
2 Waveform Recorder Logs have a combined capacity of 6 entries organized in a first-in-first-out basis,
with the newest waveform log replacing the oldest one. The waveform data is stored in the device’s
non-volatile memory and will not suffer any loss in the event of power failure.
The programming of the Waveform Recorder Log is only supported over communications. Waveform
Recorder Log provides the following setup parameters:
1)
Recording Depth
:
0 to 6 (entry)
2)
# of Samples
:
16 / 32 / 64 / 128 (samples)
3)
Number of Cycle:
40 / 20 / 10 / 5 (cycles)
4)
Pre-fault Cycle
:
0 to 5 (cycles)
The total capacity of WFR 1 and WFR 2 is 6. The valid formats (# of samples/cycle x # of cycles) of
WFR include 16x40, 32x20, 64x10 and 128x5.
All waveform recorder logs can be retrieved via communications by our PecStar® iEMS, iEEM, iPQMS
or our free PMC Setup Software for display.
Figure 4-1 Waveform Recording displayed in PecStar®
4.4.6 SOE Log
The PMC-630E’s SOE Log can store up to 64 events such as power-on, power-off, setpoint actions,
relay actions, Digital Input status changes and setup changes in its non-volatile memory. Each event
record includes the event classification, its relevant parameter values and a timestamp in 1ms
resolution.
All events can be retrieved via communications for display. If there are more than 64 events, the
newest event will replace the oldest event on a first-in-first-out basis. The SOE Log can be reset from
the front panel or via communications.
4.5 Power Quality
4.5.1 Harmonics
The PMC-630E provides on-board harmonics analysis for THD, TOHD, TEHD, K-factor and Individual
Harmonics up to the 31
st
order. All harmonics parameters are available through communications,
and individual harmonics from 2
nd
to 31
st
are available through the front panel LCD display.
There are two ways to calculate the individual harmonic distortion:
UA
UB
UC
