SATEC SA300 ezPAC Operation Manual - Manual (Page 95)

Chapter 8 Configuring Recorders Configuring the EN50160 Power Quality Recorder
SA300 Substation Automation Unit 95
You can specify for each PQ trigger how much time to record data using one or more
time envelopes.
To enable or disable the PQ recorder:
1. Check or uncheck the “Recorder Enabled” checkbox.
2. Send your setting to the device.
Power Quality Event Indication and Cross Triggering
When the PQ recorder detects a power quality fault, it generates the specific internal
event PQ EVENT that can be monitored through a control setpoint to give a fault
indication via relay contacts. The event can be found under the STATIC EVENTS
group in the setpoint trigger list.
The power quality fault signal is used for cross triggering multiple recorders through a
dedicated digital input in order to simultaneously record disturbances at different
locations. External triggering of the Waveform and Data recorders for recording
disturbance data can be done through a setpoint programmed to monitor the status of
a digital input. For more information on cross triggering, see
Fault Indication and
Cross Triggering .
Configuring the EN50160 Power Quality Recorder
EN50160 Background
The EN50160 European standard “Voltage characteristics of electricity supplied by
public distribution systems” issued by CENELEC defines the main physical
characteristics of electric energy supplied by low and medium voltage public
distribution systems under normal operating conditions.
The voltage characteristics are evaluated using a statistical approach. The standard
and its referenced publications specify for each voltage characteristic:
- Method of evaluation
-
Integrating interval for a single measurement
- Observation period
-
Statistical indication of the probability of not exceeding a specified limit
- Standard compliance limits or indicative values within which any
customer can expect the voltage characteristics to remain
Compliance Limits
For some voltage characteristics, the standard provides definite limits that can be
complied with for most of the time considering the possibility of relatively rare
excursions beyond these limits. Limits are set with a view to compliance for a
percentage of the observation time, e.g. 95% of the observations in any period of one
week.
The following table gives the characteristics for which definite limits have been
specified by the standard.
Voltage characteristic Compliance with stated
limits, % of time
Observation
period
Power frequency ±1% for 95% of a week
±1% for 99.5% of a year
+4/-6% for 100% of time
Week, year
Voltage variations (supply
voltage magnitude) ±10% Un for 95% of time Week
Rapid voltage changes ≤4-5% Un (up to 10% Un) Day
Flicker (fluctuations of
voltage magnitude) Plt ≤ 1 for 95% of time Week
Voltage unbalance ≤2-3% for 95% of time Week
Harmonic voltage THD ≤ 8 for 95% of time Week
Interharmonic voltage To be defined Week
Mains signaling voltage Within “Meister-curve” for
99% of time Day