SATEC EM920 Operation Manual - Manual (Page 123)

Chapter 5 Configuring the EM920
Configuring the EN50160 Recorders
EM920 Power Quality and Revenue Meter 123
Option Range Default Description
PQ Log
Threshold, % 0-200.0% Defines the operating threshold for a PQ
trigger in percent of the nominal
(reference) value
Hysteresis, % 0-50.0% 5.0 Defines the hysteresis for a PQ trigger in
percent of the threshold
Enabled Checked
Unchecked
Enables recording PQ events for a specific
voltage characteristic
Waveform Log
On Start Checked
Unchecked Checked Enables waveform log when a PQ event
starts
On End Checked
Unchecked Unchecked Enables waveform log when a PQ event
ends
Log No. 1-2 Specifies the waveform log file used for
waveform recording on a PQ event
Data/RMS trend – Time envelopes and Maximum Durations
Enabled Checked
Unchecked
Unchecked Enables recording of the RMS profile during
a fault event
1/2-cyc, cycles 0-1000 cycles 30 Maximum duration of the RMS profile log at
a 1/2-cycle rate.
0.2-s, seconds 0-1000 s 3 Maximum duration of the RMS profile log at
a 0.2-second rate.
3-s, minutes 0-1000 minutes 3 Maximum duration of the RMS profile log at
a 3-second rate.
10-min, hours 0-1000 hours 3 Maximum duration of the RMS profile log at
a 10-minute rate.
Before, Cycles 0-20 cycles 4 The number of cycles to be recorded prior
to the event
After, Cycles 0-20 cycles 4 The number of cycles to be recorded after
the event
Log No. 14 14 Specifies the data log file used for data
recording on the fault event
Waveform log options allow recording waveforms both at the
start and at the end of an event. Since voltage variations can
last from some seconds to minutes, this allows recording
voltage transitions at the beginning and at the end of a
voltage dip or overvoltage using shorter waveforms.
RMS profiling options allow long-duration recording of RMS
voltages and currents while the event continues, using a
variable recording rate and variable averaging intervals.
NOTES
1. The low threshold for detecting transient overvoltages
is specified in percent of the nominal voltage amplitude
(1.414 Un), either as a peak value (from 120%), or as
the impulse amplitude (from 20%), depending on the
option you selected in the
EN50160 Advanced Setup .
2. In meters with the fast transient recorder option, the
low threshold for transient overvoltages is limited to
40V. Although you can specify lower values, the meter
will automatically limit it at 40V.
3. With the fast transient recorder, a one-cycle transient
voltage waveform is automatically recorded to
Waveform log #3. If you enable recording conventional
waveforms to Waveform log #1 or #2, then a second