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8-3
CH 8/ Reports
EN50160 Measurement Parameters
EN50160
parameters
Statistical data is calculated based on the parameters required by EN50160 for
determining QOS compliance. PowerVisa displays the parameters in the form of a
Compliance Statistical Bar Chart. From the Reports screen, press EN50160.
The bar chart indicates the percentage of the intervals passing the specified compliance
criteria. The color of the bar indicates the compliance status. A green bar indicates that
the parameter is within compliance. A red bar indicates that the parameter does not
comply with EN50160 Standard. See below for the description of each measurement
parameter. For the QOS compliance limit values of EN50160 parameters, refer to the
table of Compliance Limits on page 8-5.
Power Frequency: In case of a fault operation, parts of an interconnected system may
become isolated. Compliance will be assessed over an observation period of one week,
by a statistical analysis carried out over the sequence of 10 seconds measurement.
Frequency is represented by a single value and a single bar. The bar is a hyperlink to
the Power Frequency Graph (see page 8-8).
Supply Voltage Variations: Under normal operating conditions, load changes cause
variations of the 10 minute average supply voltage. Generally this is compensated by
automatic voltage regulation within a period of a few tenths of seconds. Supply Voltage
Variations display a cluster of bars, one for each phase. The color of each bar indicates
the compliance status for its phase. A green bar indicates that the parameter is within
compliance. A red bar indicates the parameter does not comply with EN50160.
Flicker: Typical rapid voltage changes or flicker do not exceed a magnitude of +5% or
-5% of the nominal or declared voltage. This limitation is possible because connection
of loads capable of creating rapid voltage changes is usually subjected to regulations.
However under certain conditions, higher values of up to 10% may occur. These higher
values can occur for instance in areas where high power motor equipment (blower,
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