CET Electric Technology
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4.6.4
Waveform Recorder (WFR) Log
The iMeter 6 provides 2 independent groups of Waveform Recorders (
WFR
) with 128 entries each. Each WFR
can simultaneously capture 3-phase Voltage and Current signals at a maximum resolution of 256 samples per
cycles. The WFR can be triggered by Setpoints, Dip/Swell and Transient Detection or manually through Front
Panel or communications. The manual trigger command has a higher priority. When the WFR is already in
progress, other WFR commands will be ignored until the current recording has completed.
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 WFR is supported via the Web Interface or communications. The WFR provides the
following setup parameters:
Setup Parameters
Value/Option
Default
WFR 1
WFR 2
Recording Depth
128 (Fixed)
128
128
Format
256x20, 128x40, 64x80, 32x160, 16x320
256x20
256x20
Pre-fault Cycles
0 to 20 Cycles
4
6
Table 4-19 WFR Setup Parameters
The recording depth for WFR 1 and WFR 2 is fixed at 128 each. The valid formats (# of samples/cycle x # of cycles)
of WFR include 16x320, 32x160, 64x80, 128x40 and 256x20. When the WFR format is 256 samples/cycles, the
“
Pre-fault Cycle
” can only be set between 0 and 20.
The WFR logs can be retrieved in COMTRADE file format via the Web Interface or communications with our
PecStar® iEMS or free PMC Setup Software for display.
Figure 4-4 WFR Log displayed on iMeter 6’s Web Interface
4.6.5
PQ Log
The iMeter 6’s
PQ Log
can store up to 512 PQ events such as Dips/Swells and Transients. Each event record
includes the event classification, its relevant voltage values and a timestamp in 1ms resolution.
All events can be retrieved via Front Panel, Web Interface or through communications for display. If there are
more than 512 events, the newest event will replace the oldest event on a First-In-First-Out basis. The PQ Log
can be reset from the Front Panel,
Web Interface
or via communications.
4.6.6
SOE Log
The iMeter 6’s SOE Log can store up to 512 events such as Dips, Swells, Interruptions, Transients, 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 Front Panel, Web Interface or through communications for display.
If there are more than 512 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, Web Interface or via communications.
4.6.7
Data Recorder (DR) Log
The iMeter 6 comes equipped with 1GB of memory and provides 4 High-Speed Data Recorders (
HS DR
) as well
as 12 Standard Data Recorders (
DR
) capable of recording 16 parameters each. The recorded data is stored in the
device’s non-volatile memory and will not suffer any loss in the event of power failure.
