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Dran-View 6 User Guide

Compare harmonics against limits

Advanced

Category

Enterprise

Edition

Only

This option allows you to compare

harmonics against your own or pre-

defined limits. A set of pre-defined

limits is available when installing Dran-

View. These files have the extension

.DLM and can be loaded using the

“Open” button. The current settings can

be saved using the “Save” button.

The Report Writer will create a

PASS/FAIL report for the selected

harmonics.

Description This exit-box should contain a brief description of the limits

entered. The description will be included in the final page.

Cumulative

threshold (1-

100%)

This edit-box should contain a statistical value between 1-

100%. Most power quality standards include information about

this number; usually 95% or 100% is used. If a value other

than 100% is used, some fluctuations are filtered out. A 95%

value means that the worst (highest) 5% is excluded.

Planning level

(1-500%)

This edit-box allows you to scale the limits by the percentage

given. Typically this value is set to 100%, which means that

the limits are not modified before comparison.

Unit This combo-box contains the selection of “I” (current

harmonic) or “V” (voltage harmonic).

Harm This combo-box allows you to select what harmonic number to

analyze. Available selections include THD, DC, FND, H02-

H50.

Limit This edit-box contains the limit to compare against. If this field

is blank or 0.0, the row will not be part of the comparison.

Scale This combo-box allows you to select if the harmonic is in

“Abs” (volts or amps unit) or “%FND” (normalized to

fundamental).

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Dranetz Guide Guide de l'utilisateur Page 61