Appendix E En50160 Evaluation And Recording; En50160 Background - Satec Expertmeter EM720 Operation Manual

Appendix E EN50160 Evaluation and Recording

Appendix E EN50160 Evaluation and
Recording

EN50160 Background

Compliance Limits
202
The EN50160 European standard "Voltage characteristics
of electricity supplied by public distribution systems"
issued by CENELEC
characteristics of electric energy supplied by low and
medium voltage public distribution systems under normal
operating conditions.
The voltage characteristics
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
For some voltage characteristics, the standard provides
definite limits that can be complied with for most of the
time considering
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
Power frequency
Voltage variations
(supply voltage
magnitude)
Rapid voltage changes
Flicker (fluctuations of
voltage magnitude)
Voltage unbalance
Harmonic voltage
Interharmonic voltage
Mains signaling voltage
EM720 Power Quality and Revenue Meter
defines the
are evaluated
the possibility of
Compliance with stated
limits, % of time
±1% for 95% of a week
±1% for 99.5% of a year
+4/-6% for 100% of time
±10% Un for 95% of time
≤4-5% Un (up to 10% Un) Day
Plt ≤ 1 for 95% of time
≤2-3% for 95% of time
THD ≤ 8 for 95% of time
To be defined
Within "Meister-curve" for
99% of time
main physical
using a
relatively rare
Observation
period
Week, year
Week
Week
Week
Week
Week
Day