Parameter description
Parameter name
Variation Ph B start time stamp (phase B variation
start time moment)
Var Dur Ph B time
Variation duration Ph C
Variation Dur Ph C
Variation Ph C start time stamp (phase C variation
start time moment)
Var Dur Ph C time
Current magnitude Ph A preceding variation
Var current Ph A
Current magnitude Ph B preceding variation
Var current Ph B
Current magnitude Ph C preceding variation
Var current Ph C
Table 927:
Enumeration values for the recorded data parameters
Setting name
Enum name
Value
Variation type
Swell
1
Variation type
Dip
2
Variation type
Swell + dip
3
Variation type
Interruption
4
Variation type
Swell + Int
5
Variation type
Dip + Int
6
Variation type
Swell+dip+Int
7
10.3.6
Application
Voltage variations are the most typical power quality variations on the public electric
network. Typically, short-duration voltage variations are defined to last more than half of
the nominal frequency period and less than one minute (European Standard EN 50160 and
IEEE Std 1159-1995).
These short-duration voltage variations are almost always caused by a fault condition.
Depending on where the fault is located, it can cause either a temporary voltage rise
(swell) or voltage drop (dip). A special case of voltage drop is the complete loss of voltage
(interruption).
PQSS is used for measuring short-duration voltage variations in distribution networks.
The power quality is evaluated in the voltage waveform by measuring the voltage swells,
dips and interruptions.
Section 10
1MAC059074-MB A
Power quality measurement functions
1054
615 series ANSI
Technical Manual
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