User's Manual

PC Software for 1740 Series

PQ Log Feature Reference

Note

If one of the files is selected, the presentation of current harmonics bars is

suppressed because EN 50160 does not deal with current harmonics. To see

graphs for the current harmonics, save the limit value file under another

specific name. Filename 50160_61000-2-2.gwd provides harmonics limits

up to the 50th order according to IEC 61000-2-2. Default GWD60Hz.gwd

is for applications in 60 Hz systems.

Application Oriented Analysis File

Select a user defined application oriented analysis file, which can be modified according

to your experience and knowledge.

Serial Port

Set COM port (COM1.9) and Baud rate. The Logger automatically recognizes the Baud

rate. The standard Baud rate is 115200 Baud. If there are problems with data download,

select a lower Baud rate and close other applications (example, virus scanners).

Number of Harmonics for THD Calculation

This option is used to select whether 40 harmonics (as per EN 50160) or 50 harmonics

are taken into account for the calculation of voltage and current thd.

Reference Value for Harmonics Presentations

Define the reference for the presentation of voltage and current harmonics. The settings

are global and are applied to the Timeplot and cumulative summary of voltage and

current harmonics.

Limit Value Level File

This screen enables you to load and modify a limit value file. We can define specific

limit value files in addition to the default limit value file. EN 50160-50 Hz.gwd and EN

50160-60 Hz.gwd are according to standard EN 50160. This modified limit value file can

be stored.

Select Software Settings>General. The Limit Value Level File appears. The Limit value

file selected in this screen serves as a limit value table for the analysis of the

measurement data files.

Values within Tolerance

Enter the modified limit value for the occurrence probability. According to the EN 50160

standard, this statistical limit value is 95 %. If you change this value, all limit values will

be in relation to the new value. The new value will be updated in the entire screen.

Slow Voltage Variations

Positive tolerance, 95 % of the time:

Indicates the upper limit value of V

, which, when exceeded, is registered as a slow

voltage variation. The % V

is entered. The limit value is calculated as V

+ x % V

. In

the standard case, this value is 230 V + 10 %, i.e. 253 V.

Negative tolerance, 95 % of the time: