Evaluation Techniques - Satec expertmeter EM720 Operation Manual

Appendix E EN50160 Evaluation and Recording
Resources

Evaluation Techniques

206
values, which are intended to provide users with information
on the order of magnitude which can be expected.
The following table gives the characteristics for which
indicative values have been specified by the standard.
Voltage Characteristic
Voltage dips
Short interruptions
Long interruptions
Temporary overvoltages
Transient overvoltages
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
distribution systems, Ref: 23002 Ren9530, July 1995
Measurement guide for voltage characteristics, Ref: 23002
Ren9531, July 1995
Evaluation Counters and Evaluation Period
The EM720 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
meter collects statistical evaluation data. Supply voltage
characteristics can be evaluated on a weekly or daily basis.
The evaluation period being normally preset in your meter to
a week can be changed via the EN50160 Advanced setup.
At the end of the evaluation period, the meter records
collected statistical evaluation data to a log file, and then
EM720 Power Quality and Revenue Meter
Indicative values
Less than 1 s, 60% depth
70% less than 1 s
10 to 50% less than 3 min
Less than 1.5 kV RMS
Less than 6 kV peak
electricity supplied by
Observation
period
Year
Year
Year
Year
Year
public