B0431
Emax X1-Tmax T7-Tmax T8
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Doc N°
Mod.
Apparatus
Scale
Page No
1SDH000587R0002
3.7.6. Energy
PR333/P and PR332/P (with module PR330/V) measure total active, reactive and apparent energy of the system. 0.001 MWh,
0.001 MVARh or 0.001MVAh are the minimum values that can be displayed.
The meter can be reset by confirming the “Reset meters” menu item in the page.
Type of measurement range
Range of values
measured by the
protection release
Standard operation
Range
Tollerance %
Active energy
0,02 ... 16 Pn
0,3 ... 6 Pn
± 2,5
Reactive energy
0,02 ... 16 Pn
0,3 ... 6 Pn
± 2,5
Apparent energy
0,02 ... 16 Pn
0,3 ... 6 Pn
± 2,5
3.7.7. Peak factor
The peak factor measurement, a ratio between I
peak
/ I
rms
is available for each current phase.
The measurement is not displayed if the current is less than 0.3xIn and is not available for currents exceeding 6xIn.
Type of measurement range
Range of values
measured by the
protection release
Standard operation
Range
Tolerance %
Peak factor
0,3 ... 6 In
0,3 ... 6 In
± 1,5
3.7.8. Mains frequency
PR333/P and PR332/P (with module PR330/V) measure the mains frequency. This is calculated on the basis of the voltage (if
Umax > 0.1Un).
The measurement is guaranteed after up to 5 s from the frequency variation.
Type of measurement range
Range of values
measured by the
protection release
Standard operation
Range
Tolerance %
Mains frequency
35 ... 80 Hz
45 ... 66 Hz
± 0,2
3.7.9. Contact wear
This sub-menu displays the percentage of wear on the CB contacts.
3.7.10. Wave forms
PR333/P provides a further measurement function, which is useful for the harmonic analysis of phase currents and phase-to-
phase voltages.
The Measurements-Wave forms menu allows the operator to select from amongst 8 measurements (currents L1, L2, L3, Ne, gt,
voltages V12, V23, V31). The graphic representation of the wave form chosen (120 samples) is displayed once the measurement
has been selected:
I1 = - - -
Press ENTER to access the selected wave form menu, where acquisition can be updated (Refresh command) or an area opened
for harmonic analysis of the wave form (Harmonics command).
The Harmonics area gives the graphic representation of the module with the 1st to 40th harmonics (up to the 35th for 60 Hz
network frequency settings) given in percentage of the fundamental harmonic (1st harmonic), thus always indicated at 100%.
Total distorsion
:
150.0 %
Harmonic n. 1/40
:
100.0 %
Ne
Misura selezionata
Rappresentazione grafica delle armoniche
L’armonica selezionata lampeggia
Armonica selezionata
Distorsione armonica percentuale totale
Distorsione percentuale
dell’armonica selezionata
Use the UP and DOWN keys
to move to the required bar and read the corresponding percentage value.
The measuring accuracy is 5%.
B1751
