SATEC SA300 ezPAC Operation Manual - Manual (Page 93)

Chapter 8 Configuring Recorders Configuring the IEEE 1159 Power Quality Recorder
SA300 Substation Automation Unit 93
PQ Events Evaluation
The events are classified in accordance with the IEEE 1159 power quality categories.
The table below shows the categories recorded by the device, the metering data used
to detect voltage and frequency faults, their typical triggering thresholds and event
durations.
Impulsive transients. Impulsive transients are detected as impulses with a rise time
less than 0.5 ms and duration from 150 us to ½ cycle. The impulse magnitude is
measured as the overshoot voltage magnitude above the normal voltage waveshape.
It is referenced to the nominal peak voltage (1.414 Un).
Sags and swells. A voltage sag or swell is classified as one polyphase event
regardless of the shape and of the number of phases affected (as per IEC 61000-4-
30). An event can begin on one phase and end on another phase. The fault
magnitude is recorded separately for each phase involved. The event duration is
measured from the instant at which the voltage falls/rises below/above the start
threshold on one of the phases to that at which it becomes greater/lower than the end
threshold on all affected phases including a threshold hysteresis.
Voltage Interruptions. The voltage interruption is detected when the voltages on all
phases fall below the interruption threshold (as per IEC 61000-4-30).
Flicker. The flicker is evaluated according to IEC 61000-4-15. The 10-min Pst values
are used to follow and indicate the flicker faults.
Event ID IEEE 1159 category Trigger parameter Reference
value
Typical
thresholds,
% Event
duration
PQE11 Impulsive transients Instantaneous
overshoot voltage
Un peak
voltage 20-200% 150 us–10 ms
PQE211 Instantaneous sag ½ cycle RMS voltage Un RMS 80-90% < 30 cycles
PQE212 Instantaneous swell ½ cycle RMS voltage Un RMS 110-120% < 30 cycles
PQE221 Momentary interruption ½ cycle RMS voltage Un RMS 0-10% < 3 sec
PQE222 Momentary sag ½ cycle RMS voltage Un RMS 80-90% < 3 sec
PQE223 Momentary swell ½ cycle RMS voltage Un RMS 110-120% < 3 sec
PQE231 Temporary interruption ½ cycle RMS voltage Un RMS 0-10% < 1 min
PQE232 Temporary sag ½ cycle RMS voltage Un RMS 80-90% < 1 min
PQE233 Temporary swell ½ cycle RMS voltage Un RMS 110-120% < 1 min
PQE31 Sustained interruption ½ cycle RMS voltage Un RMS 0-10% > 1 min
PQE32 Undervoltage ½ cycle RMS voltage Un RMS 80-90% > 1 min
PQE33 Overvoltage ½ cycle RMS voltage Un RMS 110-120% > 1 min
PQE4 Voltage unbalance 3-sec negative
sequence unbalance No 1-5% Steady state
PQE52 Harmonics THD 3-sec harmonic THD No 5-20% Steady state
PQE53 Interharmonics THD 3-sec interharmonic
THD No 2-8% Steady state
PQE6 Voltage fluctuations
(flicker)
10-min Pst No 1-5 Steady state
PQE7 Frequency variations 3-sec frequency Nominal
frequency
1-6% Steady state
Un – nominal device voltage
PQ Recorder Setup
The IEEE 1159 PQ recorder setup allows you to adjust thresholds and hysteresis for
PQ triggers, to define the waveform and data log options for PQ events, and to
enable or disable the PQ recorder in your device.
To configure the PQ recorder:
1. Select Memory/Log from the Meter Setup menu, then click on the
PQ Recorder tab.
2. If you want to change the default settings, adjust thresholds and
hysteresis for PQ triggers
3. Select the waveform and data logging options for PQ events
4. Download your setup to the device.