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8-5
CH 8/ Reports
EN50160 Compliance Limits
Compliance
limits
The table below indicates the limit numbers or range of values required for each
parameter to pass QOS compliance and satisfy EN50160 standard.
Continued on next page
Parameter Limits for QOS Compliance to Pass
Un = Low Voltage (LV) Supply nominal voltage, upper limit 1kV
Uc = Medium Voltage (MV) Supply Characteristics - declared voltage, range 1kV to 35kV
Power frequency with
synchronous connection to an
interconnected system Mean value over 10 seconds
•
±
1% during 95% of one week
•
±
4% during 100% of one week
Power frequency with no
synchronous connection to an
interconnected system Mean value over 10 seconds
•
±
2% during 95% of one week
•
±
15% during 100% of one week
Magnitude of the supply voltage
(In low voltage systems, declared
and nominal voltage are equal) Mean rms over 10 minutes
•
±
10% of Un or Uc during 95% of one week
•
±
10% to 15% of Un during 100% of one week
Supply voltage variations (Under
normal operating conditions,
excluding situations arising from
faults or voltage interruptions) Mean rms over 10 minutes
•
±
0% of Un or Uc during 95% of one week
• ±10% to 15% of Un during 100% of one week
Flicker Plt < 1 for 95% of the time
Also 5% normal, 10% infrequent for LV, 4 &6
for MV
Supply voltage dips No criteria specified, just reported in DISDIP
table
Short interruptions of the supply
voltage <1 second for 70% of the short interruptions
Temporary power-frequency
overvoltage between live
conductors and earth 1.5kV for LV
170% for solid or impedance earth,
200% unearthed of resonate earth
Transient overvoltages between
live conductors and earth Short duration surges: <1 us
Medium duration surges: >1 to <100 us
Long duration surges: >100 us
Supply voltage unbalance
(Under normal operating
conditions) 10 minute mean rms values of the negative phase
sequence component/positive phase sequence
component
• <2% during 95% each period of one week