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4.5.4. PHASE HARMONICS
The %f-%r Phase Harmonic Ratios menu defines the reference for the level of harmonics of the phases.
1.
At the Non-Active Values screen, press the %f-%r function button to display the Phase Harmonic Ratios screen.
2.
Use the arrow buttons (, ) to set the reference for harmonics:
■
%f: the reference is the value of the fundamental.
■
%r: the reference is the total value.
3.
Press to validate the selection and return to the Configuration menu.
For the level of harmonics of the V-h, A-h, and U-h phases, the fundamental and total values are RMS values. For the level of
harmonics of the S-h phases, the fundamental and total values are apparent power values.
NOTE: You cannot change this option when the instrument is recording and/or searching for alarms.
4.5.5. LONG-TERM FLICKER (PLT)
The PLT Long-Term Flicker menu defines the method used to calculate the PLT (long-term flicker).
1.
At the Non-Active Values screen, press the PLT function button to display the Long-Term Flicker screen.
2.
Use the arrow buttons (, ) to choose sliding or non-sliding.
■
Sliding: the PLT is calculated every 10 minutes. The first value is available 2 hours after the instrument is turned ON,
because it takes 12 values of PST to calculate the PLT.
■
Non-sliding: the PLT is calculated every 2 hours.
3.
Validate by pressing the button. The instrument returns to the Configuration menu.
NOTE: You cannot change this option when the instrument is recording and/or searching for alarms.
Figure 4-10
Figure 4-11
27
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