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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