SATEC SA300 ezPAC Operation Manual - Manual (Page 96)

Chapter 8 Configuring Recorders Configuring the EN50160 Power Quality Recorder
96 SA300 Substation Automation Unit
Indicatives Values
For the remaining characteristics of the voltage, by their unpredictable nature, the
standard gives only indicative values, which are intended to provide users with
information on the expected order of magnitude.
The following table gives the characteristics for which indicative values have been
specified by the standard.
Voltage Characteristic Indicative values Observation
period
Voltage dips Less than 1 s, 60% depth Year
Short interruptions 70% less than 1 s Year
Long interruptions 10 to 50% less than 3 min Year
Temporary overvoltages Less than 1.5 kV RMS Year
Transient overvoltages Less than 6 kV peak Year
Resources
CENELEC publications:
EN 50160:1999 Voltage characteristics of electricity supplied by public distribution
systems
IEC publications:
IEC 61000-4-7:2002 Electromagnetic compatibility (EMC) – Part 4-7 Testing and
measurement techniques – General guide on harmonics and interharmonics
measurements and instrumentation, for power supply systems and equipment
connected thereto,
IEC 61000-4-15:2003 Electromagnetic compatibility (EMC) – Part 4 Testing and
measurement techniques – Section 15: Flickermeter – Functional and design
specifications
IEC 61000-4-30:2003 Electromagnetic compatibility (EMC) – Part 4-30 Testing and
measurement techniques – Power quality measurement methods
Eurelectric (Union of the Electricity Industry) publications:
Application guide to the European Standard EN 50160 on Voltage characteristics of
electricity supplied by public distribution systems, Ref: 23002 Ren9530, July 1995
Measurement guide for voltage characteristics, Ref: 23002 Ren9531, July 1995
Evaluation Techniques
EN50160 Evaluation Counters
Evaluation Counters and Evaluation Period
The SA300 uses a set of the evaluation counters for collecting EN50160 statistics
within a specified evaluation period.
The evaluation period is the period of time within which the device collects statistical
evaluation data. Supply voltage characteristics can be evaluated on a weekly or daily
basis. The evaluation period normally preset in your device is a week; this can be
changed via the EN50160 Advanced setup.
At the end of the evaluation period, the device records collected statistical evaluation
data to a log file, then clears the evaluation registers and counters so that each
evaluation period’s statistics is stored in a separate record.
You can upload and view the online statistics data via PAS reports, using data
collected since the beginning of the present evaluation interval. You can also
manually clear the present contents of the counters though PAS before starting your
EN50160 evaluation.