P/Q scatter plot

The P/Q scatter plot is a specialised chart used in electrical engineering that illustrates the relationship between active power P and reactive power Q in an X/Y coordinate system. Pairs of values from a given time range can thus be analysed in the four quadrants.

NOTICE

Only one metering point containing the P+ and Q+ measured variables may be selected. The P- and Q- measured variables are optional.

The measured variables are automatically assigned once the metering point has been selected.

Chart properties

Axis font	Selection – Select the colour, font and size for the axis labels.
Points
Colour	Colour selection – If the “Function lines visible” option is disabled, this property determines the display colour of the individual points.
Colour inside	Colour selection – If the “Function lines visible” option is enabled, this property determines the display colour of the individual points within the permitted range.
Colour outside	Colour selection – If the “Function lines visible” option is enabled, this property determines the display colour of individual points outside the permitted range.
Size	Number – 0.1 to 10 – Allows you to adjust the point size.
Function line
Visible	Yes / No – Enables or disables the permitted cos phi range.
Quadrant I	cos – Specifies the permitted cos phi for the first quadrant Colour – Select the background colour for the permitted area in the first quadrant.
Quadrant IV	cos – Specifies the permitted cos phi for the fourth quadrant Colour – Select the background colour for the permitted area in the fourth quadrant.
Show tooltip from zoom level	Tooltips showing the values can be displayed when the mouse hovers over a data point. However, this can be distracting when the zoom level is high and there are a great many data points. Select a suitable value here as required.
Legend	Specifies which columns are displayed in the chart legend.

Toolbar

Chart
	Refresh	Reloads the data from the database and updates the chart. Please note: any unsaved changes will be overwritten by the most recent version stored in the database.
	CSV download	Generates a CSV data file and enables the browser’s download/save function.
	Properties	Opens a dialog box containing the chart properties. Here, you can, among other things, show or hide the columns in the legend.
Display (not available for all chart types)
	Time chart view	Values for the current time range are displayed in a level (x)–time (y) view. Depending on the measured variable, the level can be displayed as a line, a bar or point.
	Value table view	The values for the current time range are displayed as a table.
	Frequency distribution view	Values in the current time range are sorted by value rather than chronologically by time.
Time range
	Day view	The time range is scaled to one day.
	Week view	The time range is scaled to one week.
	Month view	The time range is scaled to one month.
	Quarter view	The time range is scaled to a quarter.
	Year view	The time range is scaled to one year.
	Display entire time range	The entire time range available in the database is loaded and the view is scaled accordingly.
	Custom time range	The display range can be customised by specifying a start and end date.
Navigation
	Go to the first record	The first available data is loaded and displayed within the currently selected time range.
	Go to the previous range	Displays the previous range.
	Go to the next range	Displays the next time range.
	Go to the last record	The most recent available data are loaded and displayed within the currently selected time range.
Show legend
Allows you to show or hide the legend.