14-3
IM 760201-01E
Specifications
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App
Index
14.3 Normal Measurement Functions (Measured
Items)
Measurement Functions Determined for Each Input Element
For details about how the measurement function values are computed and determined,
see appendix 1.
Item
Symbols and Meanings
Voltage (V)
Urms: true rms value, Umn: rectified mean value calibrated to the rms value, Udc: simple average,
Urmn: rectified mean value, Uac: AC component
Current (A)
Irms: true rms value, Imn: rectified mean value calibrated to the rms value, Idc: simple average,
Irmn: rectified mean value, Iac: AC component
Active power (W)
P
Apparent power (VA)
S
Reactive power (var)
Q
Power factor
λ
Phase difference (°)
f
Frequency (Hz)
fU (FreqU): voltage frequency, fI (FreqI): current frequency
The two frequencies fU and fI can be measured simultaneously from any installed element.
For signals that are not selected, [--------] (no data) is displayed. On models with the frequency
measurement add-on option, the fU and fI of all elements can be measured simultaneously.
Voltage max. and min. (V)
U+pk: Maximum voltage, U-pk : Minimum voltage
Current max. and min. (A)
I+pk: Maximum current, I-pk : Minimum current
Crest factor
(peak-to-rms ratio)
CfU: Voltage crest factor, CfI : Current crest factor
Integration
Time:
Integration time
WP:
Sum of positive and negative watt hours
WP+:
Sum of positive P (consumed watt hours)
WP–:
Sum of negative P (watt hours returned to the power supply)
q:
Sum of positive and negative ampere hours
q+:
Sum of positive I (ampere hours)
q–:
Sum of negative I (ampere hours)
WS:
Volt-ampere hours
WQ:
Var hours
You can select to integrate the ampere hours using Irms, Imn, Idc, Irmn, or Iac.
